ELECTRICAL GROUP GENERAL DESIGN PROCEDURES

ELECTRICAL GROUP

GENERAL DESIGN PROCEDURES

Prepared by:

M/E Engineering, P.C.

Value-driven solutions.

M/E ENGINEERING, P.C.

ELECTRICAL GROUP DESIGN PROCEDURES

November 7, 2008 TOC - 1

TABLE OF CONTENTS

Pages

Introduction.............................................................................................................................................................1

I. Project Initiation.........................................................................................................................................2

II. Project Schematic Report......................................................................................................................2 - 8

III. Project Design Development Phase ...........................................................................................................9

IV. Contract Document Phase...................................................................................................................9 - 11

V. Miscellaneous Design Guidelines:

A. Elevator Electrical Requirements ........................................................................................11 - 12

B. Fire Pump Electrical Requirements .....................................................................................12 - 37

C. Motor Information Including Circuit Sizing and Short Circuit Protection ..........................38 - 48

D. Conduit, Cable, Cable Derating, Conduit Fill, Grd/Grding Conductor, Voltage Drop .......49 - 55

E. Example One Line Diagrams...............................................................................................56 - 60

F. Transformer Data Including Losses, Protection, Coordination, Etc. ...................................61 - 77

G. Switchboard and Panelboard Schedules ..............................................................................78 - 83

H. Dry Type Transformer Schedule .........................................................................................84 - 85

I. Lighting Calculations...........................................................................................................86 - 87

J. Motor Control Center Design ..............................................................................................88 - 91

K. Electric Equipment and Control Schedules w/ Examples....................................................92 - 96

L. Telephone Memo Form........................................................................................................97 - 98

M. Conversion Factors ............................................................................................................99 - 108



November 7, 2008 Page 1

INTRODUCTION

The following information has been compiled through the years in an effort to assist you in your design and to

standardize our design efforts. The information starts with the project initiation and leads you through the entire

design process. Many items are linked to information on the Intranet and you are encouraged to use these links

in your design.

Although not covered in the design procedures, a peer review should be done on each and every project. The

peer review process can be quite extensive and in the future, a section of this manual may be dedicated to this

process. The most important item to make a peer review process as easy as possible is the use of a common

standard. This manual shows some of the standards that should be followed in the Electrical Group.

An important point to remember is that this design manual is your design manual and any input you may have

for improving the processes would be reviewed and possibly included in the manual.




I. PROJECT INITIATION

A. Project Manager should provide the M/E Project Number, a copy of the Proposal Letter

and any other written documentation outlining the Project Scope of Work, including

Project Schedule.

1. The Scope of Work should include an overview of the subsystems to be included,

an idea of how much the Owner is willing to spend, and other key criteria related

to the design (such as insurance company input, etc.).

2. On larger projects, a “kickoff” meeting should be held, with all trades attending.

B. Project Manager will determine the formal documentation required through the various

phases of project design, such as the scope and format of schematic and design

development submissions, and requirements for other submissions such as preliminary

equipment cut sheets, 50% drawing/specification submission, etc.

C. Project Manager will determine the lines of communication between M/E Engineering,

P.C. staff and the Clients, Architects, and Owners.

D. Documentation:

1. Document all meetings and communications with Clients, Architects, Utilities

Agencies, Insurance Companies, etc. Make up formal meeting notes (have them

typed) and use standard form for documentation of telephone conversations.

2. All documentation should be forwarded to the project correspondence file. If you

require a copy of any correspondence for project design, make your own copy for

your project design file.

II. PROJECT “SCHEMATIC” PHASE

A. Gather all of the facts available for the project, including review of the correspondence

file, studying the site plan and preliminary floor plans; determine the use of the building

and spaces within the building, including special usage of rooms. Remember, the

Schematic Report will be your basis for design and you will be building on this report

throughout the project. Don’t use a Schematic Report from a previous project unless your

project is identical, which is rare.

B. Determine which codes and regulations apply to the project, and perform a “code search”

to determine applicable requirements. Confirm what the current code to follow is.

Building codes sometimes reference previous code editions. The following is a listing of

some of the applicable codes and requirements:

1. NFPA-70 (National Electrical Code)

2. Building Code of New York State




3. Energy Conservation Construction Code of New York State

4. Fire Code of New York State

5. NFPA-101 (Life Safety Code)

6. NFPA-72 (National Fire Code)

7. NFPA-90A (HVAC System)

8. NFPA-99 (Health Care Facilities)

9. New York State Hospital Code (Title 10)

10. New York State Title 10, Article 713 (for Nursing Homes)

11. NFPA-110 (Emergency and Standby Power Systems)

12. NFPA-20 (Fire Pumps)

13. ANSI A17.1 (Elevator Code)

14. New York State Education Department (SED) Manual of Planning Standards

15. Utility Company Requirements

16. Others as applicable

C. Determine Architectural requirements such as lighting, visible equipment, finishes, colors,

etc.

D. Determine Utility Company requirements, with regard to their effect on the project, such

as service voltage, transformer location, primary/secondary metering, service entrance

location, etc. Consider the following:

1. Power Company

2. Telephone Company

3. Fire Department tie for fire alarm.

4. CATV Co.

E. Do Preliminary Systems Layouts:

1. Power Distribution:

a. Determine building loads based on input from HVAC and plumbing

engineers, and based on watts per square foot estimates, such as published

in Means Electrical Costs Data Book.

b. Determine best suitable service voltage for the project based on the loads to

be served. Examples:

1. Large facilities, consider medium voltage and unit substations.

2. Smaller facilities, if there is a call for chillers, large air handlers,

etc. consider 480Y/277 with stepdown transformers for 208Y/120,

otherwise 208Y/120 would suffice.

c. Sketch a preliminary one-line diagram, and determine preliminary

equipment sizing. Consider equipment connections, such as whether motor




control centers could be utilized to serve HVAC equipment. At this stage,

with the cooperation of the Mechanical Group, you should be able to

develop a preliminary Electrical Equipment and Control Schedule.

d. Determine and sketch preliminary equipment layout and space

requirements. Include any required lighting or special systems control

panels, etc. Include code-required clearances on plan with a dashed line.

Consider equipment maintenance (such as changing oil on an emergency

generator, changing lamps in hard-to-reach luminaires such as in atriums,

etc.). Coordinate space requirements with other trades, especially in

combined mechanical/electrical equipment rooms.

e. Determine electronic equipment loads and determine whether special

requirements such as double neutrals (Note: per NEC, paralleled

conductors must be 1/0 or larger; for a 100A double neutral, use one (1)

3/0, not 2-#2 AWG), K-rated transformers, electronic grade panelboards,

etc. are required.

f. Contact the Utility Company Account Representative and write initial

project information letter and include preliminary equipment loads, site

plan, one-line diagram, and Electric Planning Form as applicable. The

following is a recommended procedure to follow:

1. Initial information letter describing requested electric service

characteristics (voltage, phase, ampacity, whether overhead or

underground, primary or secondary), estimated connected loads,

estimated demand, project construction schedule including bid date;

include a preliminary one-line diagram and site plan. Refer to

“Sample Utility Company Information Letter” in the appendix.

2. Whether temporary power for construction will be required. This is

important because a separate request for electric service may have

to be written.

3. Electric planning form (in the appendix).

4. Request for required information, including:

a. Project account representative (list in specifications

for contractor information)

b. Service location and characteristics (pole top or pad

mount transformer, etc.)

c. Customer requirements (pads to be provided by

customer, conduits, switches, etc.)




d. Available short circuit current. Utilities will use 500

MVA or infinite bus.

e. Budget cost to provide electric service.

5. Lighting:

a. Determine preliminary lighting requirements, such as

emergency egress lighting (battery pack or generator

backup?), night lighting, exit lights, site and security

lighting, and building interior lighting (prismatic or

parabolic louvers?), etc.

2. Special Systems:

a. Determine preliminary special system requirements, including:

1. Fire Alarm

2. Security/Access Control

3. Telephone Outlet Locations

4. Computer/Data Outlet Locations

5. Paging/Intercom

6. Nurse Call

7. Media Retrieval

8. Central Clock System

9. Lightning Protection

10. Closed Circuit Television

11. Medical Gas Alarms

12. CATV/MATV

F. “Pull” required specification sections, and compile a drawing list.

G. If required by Project Manager, provide a preliminary cost estimate, or update program

phase estimate.

H. Document the above as required by the Project Manager.

I. Start project design file or notebook. Following is a suggested format:

1. In general, each project shall have a design book in lieu of manila folders, etc.

Design book shall be indexed utilizing the following categories as a guideline:

a. Project Description

Work Plan

Budget

Schedule




b. General Correspondence (in chronological order)

Correspondence

Interoffice Memos

Records of Telephone Conversations

c. Utility Company Correspondence (in chronological order)

Power Company

Telephone Company

d. Calculations (Refer to Contract Document Phase below)

Service

Short-Circuit

Feeder

Voltage Drop

Lighting

e. Equipment Schedules

(Utilize standard M/E forms for every project)

Panelboard Schedules

Panelboard Sizing

Feeder Schedules

Conduit and Cable Schedule

Lighting Fixture Schedules (on Microstation)

Kitchen Equipment Schedule

Transformer Schedules

Motor Control Center Schedule

Electric Equipment and Control Schedules

f. Equipment Selection

Manufacturer’s Cut Sheets

Manufacturer’s Specifications

Mechanical Equipment

g. Cost Estimates

h. Miscellaneous

X-Ray Equipment

Pool Equipment

Site Visitation Notes, etc.

Shop Equipment




Laboratory Equipment

J. Template for a Schematic Report:

III. ELECTRICAL:

A. Design Criteria:

1. Code Standards:

a. Systems shall be designed in accordance with, but not limited to, the following

codes:

- International Building Code or

- Building Code of New York State

- Fire Code of New York State

- Energy Conservation Construction Code of New York State

- NFPA 70, National Electric Code (NEC)

- NFPA 110, Life Safety Code

- NFPA 72, Fire Alarm Code

2. Design Standards:

a. Systems shall be designed in accordance with, but not limited to, the following

standards:

- AEIA, Association of Edison Illuminating Companies

- ANSI, American National Standards Institute

- ASTM, American Society of Testing and Materials

- IEEE, Institute of Electrical and Electronic Engineers

- IES, Illuminating Engineers Society

- ICEA, Insulated Cable Engineers Association

- NEMA, National Electrical Manufacturers Association

- NFPA, National Fire Protection Association

- UL, Underwriters Laboratories

B. Description of Existing Facility Electrical Systems:

1. Electric Service:


3. Emergency Power Distribution:

4. Lighting System:

5. Fire Alarm System:

6. Telephone System:




7. Computer/Data/Network/etc.:

8. Security Systems, CCTV, Door Access:

9. Cable TV (CATV):

10. CCTV:

11. Nurse Call:

12. Sound/PA System:

13. Clock System:

14. Rescue Assistance System:

C. Proposed Facility Electrical Systems:

1. Electric Service:


3. Emergency Power Distribution:

4. Lighting System:

5. Fire Alarm System:

6. Telephone System:

7. Computer/Data/Network/etc.:

8. Security Systems, CCTV, Door Access:

9. Cable TV (CATV):

10. Nurse Call:

11. Sound/PA System:

12. Clock System:

13. Rescue Assistance System:

D. Outline Specifications: [INSERT ALL SPECIFICATIONS SECTIONS AND MATERIAL

MANUFACTURERS PROPOSED TO BE USED]

E. Estimate of Construction:




III. PROJECT “DESIGN DEVELOPMENT” PHASE

A. Determine the final basics for all electrical systems such as electrical service

configuration, emergency power requirements, special system types (fire alarm, nurse call

requirements, etc.).

B. Determine other special Architectural features that affect your work (such as underfloor

duct distribution, smoke and fire barriers, etc.).

C. Determine final electrical and mechanical space requirements, in Mechanical Rooms and

elsewhere (such as coordinating a bus duct or large feeder run with ductwork and piping,

etc.). Coordinate all space requirements with all trades, building structure, etc. Layout

electric rooms in ¼” scale with design make equipment to confirm it will fit. Draw an

elevation of the equipment and submit to manufacturer’s representative to confirm

arrangement.

D. Obtain preliminary equipment data from all trades, including Architect (elevators, smoke

hatches, motor operated doors, etc.).

E. Estimate total connected load and electrical demand.

F. Confirm applicable codes (be sure to check for other applicable codes outside of New

York State, such as IBC, B.O.C.A. codes, etc.).

G. Confirm all vital items with Utility Company, Owner, Architect, Municipality, etc.

H. Make preliminary electric equipment and control schedule, using preliminary loads

furnished by other trades (HVAC, Plumbing and Architectural). Give the preliminary

HVAC schedule to HVAC engineer. Use the link, Preliminary HVAC Schedule.

I. Prepare preliminary site plan, typical room layouts and equipment room layout drawings.

J. Determine format for specifications and drawings, provide Project Manager with

preliminary drawing and specification section lists.

K. Do first draft “red-mark” of specifications.

L. Update costs estimates if required.

M. Compile a list of questions for Architect and Owner, and submit to them as directed by

Project Manager.

N. Document the above as required by Project Manager. Have the above reviewed by

Department Manager.

IV. “CONTRACT DOCUMENT” PHASE




A. Obtain additional building plans, site plans, sections, elevations, room data, room names

and numbers, etc. Coordinate all final equipment/device locations with Architects (such

as marking-up a building elevation to show wall mounted lighting fixtures, etc.).

B. Do final coordination between other trades, including equipment rooms, ceiling plans

(lights, diffusers, sprinkler heads, etc.).

C. Obtain final load data and equipment information and incorporate into final design.

D. Do final calculations. Utilize available computer programs. Calculations which should be

done on all projects:

1. Lighting calculations for each typical or unusual room. Use the following link,

Lighting Calculations.

2. Load calculations, based on panelboard schedules. Use the following links,

Panelboard Sizing, Switchboard Sizing.

3. Short circuit calculations. Use SKM Powertools software. If you are unfamiliar

with the software, contact a Senior Engineer to assist you. For a quick calculation,

use the following link, Fault Current Calculator.

4. Time Current Coordination (TCC). Use SKM Powertools software. If you are

unfamiliar with the software, contact a Senior Engineer to assist you. Our

specifications call for circuit breakers 400 amp frame and above to have adjustable

trips. Trip settings should be determined for design make equipment. Don’t rely

on the electrical contractor to do this. It is the engineer’s responsibility to design a

safe and reliable system, not the electrical contractor’s.

5. Arc Flash. Use SKM Powertools software. If you are unfamiliar with the

software, contact a Senior Engineer to assist you.

6. Voltage drop calculations (Load Flow). Use SKM Powertools software. If you are

unfamiliar with the software, contact a Senior Engineer to assist you. For quick

calculations, use the following link, Voltage Drop Calculator.

E. Select equipment. Show on plans to scale, and finalize in specifications.

F. Finish schedules, specifications and drawings.

G. Do final coordination with other trades, with regard to electric equipment and control

schedule, space requirements and bus duct, feeder and cable tray runs.

H. Update final estimates as required.

I. Check drafting.




J. Provide complete set of drawings/specifications to Department Manager for review.

V. MISCELLANEOUS DESIGN GUIDELINES

A. ELEVATOR ELECTRICAL REQUIREMENTS:

1. Power Requirements:

a. Provide a fused disconnect switch for each elevator, located adjacent to the

door of the Machine Room (possibly so it can be operated from outside the

room), and feeder wiring from source to disconnect, and from disconnect to

the elevator controller. Meet elevator manufacturer’s stringent voltage

drop requirements on elevator starting, verify with Architect whether

reduced voltage or wye-delta starting is specified. Determine whether

emergency power is required. Refer to NEC Article 430-52 “Exceptions”

to select applicable protective device ratings, and apply this exception

fully.

b. Provide a 120 volt, 20 amp single phase power supply to a fused SPST

disconnect switch located in the Machine Room for each elevator, and

branch circuit from switch to elevator controller, for elevator car lights.

Provide emergency power (Life Safety Branch) where available.

c. Provide suitable light and GFI receptacle in Machine Room, with light

switch located within 18 in. of lock jamb side of Machine Room door.

d. Provide GFI receptacle and light fixture in elevator pit with light switch

located adjacent to access door or ladder. Provide additional light fixtures

on alternate floor levels for more than two stories.

e. Provide special power requirements (verify with elevator manufacturer) for

group controllers, which may require a separate single phase power supply

to a DPST disconnect switch.

f. Where generator power is provided, provide two conductors from an

auxiliary contact on the automatic (or manual) transfer switch to the

elevator controller; the contact shall be N.C. and shall open when the

transfer switch is in the “emergency” position.

2. Communication Requirements:

a. Provide telephone service (outlet) at elevator controller for communicating

or signaling to an accessible point outside the hoistway or to a central

exchange system or approved emergency service.




b. Provide a separate 120 volt, 15 amp, single phase power supply to a fused

SPST disconnect switch which shall feed a duplex receptacle in the

Machine Room for intercommunicating system power supply. Provide

emergency power where available.

3. Special Requirements (ANSI A17.16):

a. Means shall be provided to automatically disconnect the main line power

supply to the affected elevator prior to the application of water from a fire

protection (sprinkler) system. Activation of sprinklers outside of the

hoistway or Machine Room shall not cause the main line power supply to

be disconnected (102.2(c)(4)). Refer to Detail No. 228.

b. Smoke detectors shall not be used to activate sprinklers or to disconnect the

main line power supply in these spaces (102.2(c) (5)).

4. Fire Alarm Requirements (ANSI A17.1b):

a. The following used to apply to all elevators having a travel distance of 25’

or more, and now applies to all elevators.

1. The only devices which are to initiate Phase I Operation

(Emergency Recall) besides keyswitches at each level shall be

smoke detectors in elevator lobbies, Machine Room or hoistway

(211.3(a)).

2. Smoke detectors shall be installed in each elevator lobby at each

landing and associated Machine Room. Detectors are not required

at unenclosed landings. Smoke detectors may be installed in any

hoistways, and shall be installed in hoistways that are sprinklered

(211.3(b)). Refer to details which follow.

B. FIRE PUMP ELECTRICAL REQUIREMENTS:

1. Chapters 9 and 10 from NFPA 20 is at the end of this section for informational

purposes.

2. NEMA ICS 14-2007, Application Guide for Electric Fire Pump Controllers is

another good resource to use for fire pump design.

3. The following notes are for the Typical Fire Pump Wiring Schematic, Detail No.

000M at the end of this Section. Balloon note numbers are not the same as the

numbers in the writeup, just remember this is a guide.

1. The notes should be similar to information provided in NFPA 20, Chapters

9 and 10 at the end of this Section.




a. Locate and arrange normal and emergency sources and feeders to

minimize the possibility of damage by fire both directly and

indirectly (such as structural collapse due to fire).

b. Service entrance conductors and/or fire pump feeder conductors

shall be physically routed outside the building and shall be installed

as service-entrance conductors in compliance with Article 230 of

the NEC (NFPA-70) . Exceptions: When installed under

(preferred) or enclosed by not less than two (2) inches of concrete

or brick per Article 230 of the NEC; when feeders used listed

electrical circuit protective methods with a one (1) hour fire

resistance; conductors located in the Pump Room and switchgear

Room. (Note: This refers to use if MI cable; enclosing the feeder

in two layers of type X drywall is not an acceptable alternative.)

c. All Pump Room wiring shall be in rigid, intermediate, or liquid

tight flexible metal conduit or type MI cable.

d. Voltage drop at motor shall not exceed 5% below motor rated

voltage when running at peak power input and rated speed.

e. Voltage drop at controller input terminals shall not exceed 15%

below controller rated voltage under motor starting conditions.

f. Where service voltage is fire pump utilization voltage, there shall be

no disconnecting means or power supply protective devices

between the power supply and the fire pump controller (preferred).

Exceptions: Any power supply protective devices provided under

the exceptions, such as ahead of a power transfer switch, shall be

selected or set to indefinitely carry the sum of the locked rotor

current of the fire pump, the jockey pump and any connected

accessory equipment.

g. Where a transformer serves a fire pump, there shall be no

disconnect means or power supply protective devices between the

transformer and the fire pump controller.

h. Conductors between the power source and the fire pump shall be

sized per Article 430 of the NEC (125% FLA) .

i. Where on-site generators are used, they shall have sufficient

capacity to allow normal starting and running of the fire pump

while supplying all other loads connected to the generator.

j. Automatic load shedding of loads not required for fire protection

shall be permitted immediately prior to starting of the fire pump.




Designer Note: Do not shed life safety loads such as egress

lighting, fire alarm, etc.

k. Transfer of power shall take place within the Pump Room.

l. Protective devices at the generator shall allow instantaneous pickup

of the full Pump Room load.

m. Fire Pump controller and transfer switch shall be suitable for the

available short circuit current (coordinate with Plumbing Designer.

n. Fire pump controller shall be listed as suitable for use as service

equipment (coordinate with Plumbing Designer).

o. Fire pump controller shall be located as close as practical to the fire

pump, and shall not be within sight of it. They shall also be located

so as not to be injured by water escaping from pumps connections.

p. Maintain electrical working clearances per Article 110 of the NEC

around fire pump controllers.

q. Fire pump controllers shall not be used as a junction box. Jockey

pump electrical supply shall not be connected to the fire pump

controller.

r. Provide the following supervised alarms remote from the Fire Pump

Room if the room is not constantly attended:

Motor running

Loss of phase

Phase reversal

Isolating switch open.

s. The above is for electric-drive fire pump not diesel driven pumps.

t. Manual transfer switches shall not be used with fire pump

controllers.

u. A listed combination fire pump controller and power transfer switch

(preferred) shall have an isolating switch located within the transfer

switch enclosure connected ahead of the alternate input terminals of

the transfer switch, and the switch shall be supervised to indicate

when it is open. Supervision shall operate an audible and visual

signal at a remote point when required.

v. Power transfer switch shall not be specifically listed for fire pump

service.




w. Underground feeders for fire pumps are strongly recommended.

x. Where primary service is provided to the building, it is suggested

that a separate transformer be provided to serve the fire pump.

y. Voltage in excess of 600V are not recommended for fire pumps

b. National Electrical Code

1. Equipment tapped to the supply side of the service disconnecting

means shall be service entrance rated (230-82).

2. Where the service to the Fire Pump Room is outside of the building,

the conductors need not have overcurrent protection in accordance

with the ampacity. Overcurrent protection for fire pump services

shall be selected or set to carry locked rotor current of the pump

indefinitely.

3. The supply to fire pump controllers, which is tapped ahead of the

building service overcurrent device, shall be separately provided

with overcurrent protection (230-94 exc 4).

4. Secondary overcurrent protection is not required on a transformer

dedicated to supplying power to a fire pump. The transformer

primary overcurrent protection shall be sufficient to carry the

equivalent of the transformer secondary current sum of the locked

rotor current of the fire pump and accessory equipment (450-3d).

c. Designer Notes:

1. Coordinate with Plumbing Designer:

a. Location of Fire Pump and Controller.

1. Within site of each other.

2. Electrical clearances.

3. Protection from fire/water damage.

b. Specification of Fire Pump Controller

1. Horsepower, voltage, service entrance rated.

2. Include automatic transfer switch.

3. Soft starting as required by generator size.




4. KAIC rating.

5. Alarms

2. Coordinate with Utility Company:

a. Service characteristics and details.

b. Utility company metering arrangement.

c. Lug capacity on transformer secondary (if applicable).

c. Many configurations in addition to that shown on the

schematic may be acceptable. Be sure to review applicable

codes and review proposed configuration with Utility

Company and local authority having jurisdiction.

d. Fire pump feeders to be in GRS conduit, preferably buried,

but at least encased by 2 inches of concrete outside of Fire

Pump and Switchgear Rooms.

B. COORDINATE WITH MECHANICAL

1. During the project Schematic Design Phase, obtain preliminary electric loads from

HVAC designer. Compare loads to watts per square foot estimate as published in

Means Electrical Costs Data Book as a check. Be sure all is included, such as the

compressor portions of PTAC units, the air cooled condenser on split systems, etc.

2. During the project Design Development Phase, obtain actual cuts for major pieces

of equipment from the HVAC and Plumbing designers; this would include chillers,

boilers, cooling towers, fire pumps, etc. Start the Electric Equipment and Control

Schedule, and determine how all equipment will be fed (from distribution panels,

MCC’s, “loose” motor starters, VFD’s, etc.). Also determine what equipment

requires emergency power. Some items which may require emergency power

boilers and circulating pumps to maintain building heat, DDC panels, fin tube

pumps, atrium air handling units, fire pumps, sump pumps, elevators, etc.

3. During the project Contract Document Phase, “circuit” all items to panels. MCC’s,

etc.; fill out panelboard schedules with loads for all equipment. **REVIEW THE

ELECTRIC EQUIPMENT AND CONTROL SCHEDULE ITEM-BY-ITEM

WITH HVAC DESIGNER** with regard to motor hp or kW, voltage, phase,

whether it requires emergency power, etc. ALSO VERIFY STARTER TYPES!

Combination starter versus variable speed drive, two speed starters (may require 6-

pole disconnect switch, to be called for an Electric Equipment and Control

Schedule), etc.




4. Show all VFD’s and major pieces of equipment (starter’s, MCC’s, etc.) on the

plans.

5. When sizing feeder breaker to VFD with bypass, starting across the line (which

occurs in bypass mode) requires larger circuit breaker than may be required on

VFD alone. Use NEC Table 430-152.

6. During Shop Drawing Review phase of the project, again coordinate all motor

starters, VFD’s, motor horsepowers, voltages, etc., with HVAC designer. Be sure

all motors which HVAC requires to be provided with VFD’s have then specified,

and those requiring combination magnetic starters, two speed starters, etc., have

them called out. This is the last chance to coordinate with HVAC; sometimes

motor horsepowers change due to submission of an alternate manufacturer’s

equipment. This must be coordinated at the Shop Drawing Review phase.

Chapter 9 Electric Drive for Pumps –NFPA 20-2007 Revision

9.1 General.

9.1.1 This chapter covers the minimum performance and testing requirements of the sources and

transmission of electrical power to motors driving fire pumps.

9.1.2 This chapter also covers the minimum performance requirements of all intermediate equipment

between the source(s) and the pump, including the motor(s) but excepting the electric fire pump

controller, transfer switch, and accessories (see Chapter 10).

9.1.3 All electrical equipment and installation methods shall comply with NFPA 70, National Electrical

Code, Article 695, and other applicable articles.

9.1.4* All power supplies shall be located and arranged to protect against damage by fire from within the

premises and exposing hazards.

9.1.5 All power supplies shall have the capacity to run the fire pump on a continuous basis.

9.1.6 All power supplies shall comply with the voltage drop requirements of Section 9.4.

9.2 Normal Power.

9.2.1 An electric motor driven fire pump shall be provided with a normal source of power as a

continually available source.

9.2.2* The normal source of power required in 9.2.1 and its routing shall be arranged in accordance with

one of the following:

(1) Service connection dedicated to the fire pump installation

(2) On-site power production facility connection dedicated to the fire pump installation

(3) Dedicated feeder connection derived directly from the dedicated service to the fire pump

installation

(4) As a feeder connection where all of the following conditions are met:

(a) The protected facility is part of a multi-building campus style arrangement.

(b) A back-up source of power is provided from a source independent of the normal source of power.

(c) It is impractical to supply the normal source of power through arrangement 9.2.2(1), 9.2.2(2), or

9.2.2(3).

(d) The arrangement is acceptable to the authority having jurisdiction.




(e) The overcurrent protection device(s) in each disconnecting means shall be selectively coordinated

with any other supply side overcurrent protective device(s).

(5) Dedicated transformer connection directly from the service meeting the requirements of Article

695 of NFPA 70, National Electrical Code

9.2.3 For fire pump installations using the arrangement of 9.2.2(1), 9.2.2(2), 9.2.2(3), or 9.2.2(5) for the

normal source of power, no more than one disconnecting means and associated overcurrent protection

device shall be installed in the power supply to the fire pump controller.

9.2.3.1 Where the disconnecting means permitted by 9.2.3 is installed, the disconnecting means shall

meet all of the following:

(1) They shall be identified as being suitable for use as service equipment.

(2) They shall be lockable in the closed position.

(3)* They shall be located remote from other building disconnecting means.

(4)* They shall be located remote from other fire pump source disconnecting means.

(5) They shall be marked “Fire Pump Disconnecting Means” in letters that are no less than 1 in. (25

mm) in height and that can be seen without opening enclosure doors or covers.

9.2.3.2 Where the disconnecting means permitted by 9.2.3 is installed, a placard shall be placed adjacent

to the fire pump controller stating the location of this disconnection means and the location of any key

needed to unlock the disconnect.

9.2.3.3 Where the disconnecting means permitted by 9.2.3 is installed, the disconnect shall be supervised

in the closed position by one of the following methods:

(1) Central station, proprietary, or remote station signal device

(2) Local signaling service that will cause the sounding of an audible signal at a constantly attended

location

(3) Locking the disconnecting means in the closed position

(4) Sealing of disconnecting means and approved weekly recorded inspections where the

disconnecting means are located within fenced enclosures or in buildings under the control of the owner

9.2.3.4 Where the overcurrent protection permitted by 9.2.3 is installed, the overcurrent protection device

shall be selected or set to carry indefinitely the sum of the locked-rotor current of the fire pump motor(s)

and the pressure maintenance pump motor(s) and the full-load current of the associated fire pump

accessory equipment.

9.3 Alternate Power.

9.3.1 Except for an arrangement described in 9.3.6, at least one alternate source of power shall be

provided when the height of the structure is beyond the pumping capacity of the fire department

apparatus.

9.3.2* Other Sources. Except for an arrangement described in 9.3.3, at least one alternate source of

power shall be provided where the normal source is not reliable.

9.3.3 An alternate source of power is not required where a back-up engine driven or back-up steam

turbine driven fire pump is installed in accordance with this standard.

9.3.4 When provided, the alternate source of power shall be supplied from one of the following sources:

(1) A generator installed in accordance with Section 9.6

(2) One of the sources identified in 9.2.2(1), 9.2.2(2), 9.2.2(3), or 9.2.2(5) when the power is provided

independent of the normal source of power

9.3.5 When provided, the alternate supply shall be arranged so that the power to the fire pump is not

disrupted when overhead lines are de-energized for fire department operations.




9.3.6 Junction Boxes. Where fire pump wiring to or from a fire pump controller is routed through a

junction box, the following requirements shall be met:

(1) The junction box shall be securely mounted.

(2)* Mounting and installing of a junction box shall not violate the enclosure type rating of the fire

pump controller(s).

(3)* Mounting and installing of a junction box shall not violate the integrity of the fire pump

controller(s) and shall not affect the short circuit rating of the controller(s).

(4) As a minimum, a Type 2, dripproof enclosure (junction box) shall be used. The enclosure shall be

listed to match the fire pump controller enclosure type rating.

(5) Terminals, junction blocks, and splices, when used, shall be listed.

9.3.7 Listed Electrical Circuit Protective System to Controller Wiring.

9.3.7.1* Where single conductors (individual conductors) are used, they shall be terminated in a separate

junction box. Single conductors (individual conductors) shall not enter the fire pump enclosure

separately.

9.3.7.2* Where required by the manufacturer of a listed electrical circuit protective system or by NFPA

70, National Electrical Code, or by the listing, the raceway between a junction box and the fire pump

controller shall be sealed at the junction box end as required and in accordance with the instructions of

the manufacturer.

9.3.7.3 Standard wiring between the junction box and the controller is acceptable.

9.3.8 Raceway Terminations.

9.3.8.1 Listed conduit hubs shall be used to terminate raceway (conduit) to the fire pump controller.

9.3.8.2 The type rating of the conduit hub(s) shall be at least equal to that of the fire pump controller.

9.3.8.3 The installation instructions of the manufacturer of the fire pump controller shall be followed.

9.3.8.4 Alterations to the fire pump controller, other than conduit entry as allowed by NFPA 70, National

Electrical Code, shall be approved by the authority having jurisdiction.

9.4* Voltage Drop.

9.4.1 Unless the requirements of 9.4.2 are met, the voltage at the controller line terminals shall not drop

more than 15 percent below normal (controller-rated voltage) under motor-starting conditions.

9.4.2 The requirements of 9.4.1 shall not apply to emergency-run mechanical starting. (See 10.5.3.2.)

9.4.3 The voltage at the motor terminals shall not drop more than 5 percent below the voltage rating of

the motor when the motor is operating at 115 percent of the full-load current rating of the motor.

9.5 Motors.

9.5.1 General.

9.5.1.1 All motors shall comply with NEMA MG-1, Motors and Generators, shall be marked as

complying with NEMA Design B standards, and shall be specifically listed for fire pump service. (See

Table 9.5.1.1.)




Table 9.5.1.1 Horsepower and Locked Rotor Current Motor Designation for NEMA Design B Motors

Rated

Horsepower

Locked Rotor Current Three-Phase

460 V (A)

Motor Designation (NFPA 70, Locked Rotor Indicating Code

Letter) “F” to and Including

5 46 J

7 64 H

10 81 H

15 116 G

20 145 G

25 183 G

30 217 G

40 290 G

50 362 G

60 435 G

75 543 G

100 725 G

125 908 G

150 1085 G

200 1450 G

250 1825 G

300 2200 G

350 2550 G

400 2900 G

450 3250 G

500 3625 G

9.5.1.2 The requirements of 9.5.1.1 shall not apply to direct-current, high-voltage (over 600 V), large-

horsepower [over 500 hp (373 kW)], single-phase, universal-type, or wound-rotor motors, which shall be

permitted to be used where approved.

9.5.1.3 Motors used with variable speed controllers shall additionally meet the applicable requirements of

NEMA MG-1, Motors and Generators, Part 31 and shall be marked for inverter duty.

9.5.1.4* The corresponding values of locked rotor current for motors rated at other voltages shall be

determined by multiplying the values shown by the ratio of 460 V to the rated voltage in Table 9.5.1.1.




9.5.1.5 Code letters of motors for all other voltages shall conform with those shown for 460 V in Table

9.5.1.1.

9.5.1.6 All motors shall be rated for continuous duty.

9.5.1.7 Electric motor–induced transients shall be coordinated with the provisions of 10.4.3.3 to prevent

nuisance tripping of motor controller protective devices.

9.5.1.8 Motors for Vertical Shaft Turbine–Type Pumps.

9.5.1.8.1 Motors for vertical shaft turbine–type pumps shall be dripproof, squirrel-cage induction type.

9.5.1.8.2 The motor shall be equipped with a nonreverse ratchet.

9.5.2 Current Limits.

9.5.2.1 The motor capacity in horsepower shall be such that the maximum motor current in any phase

under any condition of pump load and voltage unbalance shall not exceed the motor-rated full-load

current multiplied by the service factor.

9.5.2.2 The following shall apply to the service factor:

(1) The maximum service factor at which a motor shall be used is 1.15.

(2) Where the motor is used with a variable speed pressure limiting controller, the service factor shall

not be used.

9.5.2.3 These service factors shall be in accordance with NEMA MG-1, Motors and Generators.

9.5.2.4 General-purpose (open and dripproof) motors, totally enclosed fan-cooled (TEFC) motors, and

totally enclosed nonventilated (TENV) motors shall not have a service factor larger than 1.15.

9.5.2.5 Motors used at altitudes above 3300 ft (1000 m) shall be operated or derated according to NEMA

MG-1, Motors and Generators, Part 14.

9.5.3 Marking.

9.5.3.1 Marking of motor terminals shall be in accordance with NEMA MG-1, Motors and Generators,

Part 2.

9.5.3.2 A motor terminal connecting diagram for multiple lead motors shall be furnished by the motor

manufacturer.

9.6 On-Site Standby Generator Systems.

9.6.1 Capacity.

9.6.1.1 Where on-site generator systems are used to supply power to fire pump motors to meet the

requirements of 9.3.2, they shall be of sufficient capacity to allow normal starting and running of the

motor(s) driving the fire pump(s) while supplying all other simultaneously operated load(s) while

meeting the requirements of Section 9.4.

9.6.1.2 A tap ahead of the on-site generator disconnecting means shall not be required.

9.6.2* Power Sources.

9.6.2.1 On-site standby generator systems shall comply with Section 6.4 and shall meet the requirements

of Level 1, Type 10, Class X systems of NFPA 110, Standard for Emergency and Standby Power

Systems.

9.6.2.2 The fuel supply capacity shall be sufficient to provide 8 hours of fire pump operation at 100

percent of the rated pump capacity in addition to the supply required for other demands.

9.6.3 Sequencing. Automatic sequencing of the fire pumps shall be permitted in accordance with

10.5.2.5.

9.6.4 Transfer of Power. Transfer of power to the fire pump controller between the normal supply and

one alternate supply shall take place within the pump room.

9.6.5* Protective Devices. Where protective devices are installed in the on-site power source circuits at

the generator, such devices shall allow instantaneous pickup of the full pump room load.




Chapter 10 Electric-Drive Controllers and Accessories-NFPA 20-2007 REVISION

10.1 General.

10.1.1 Application.

10.1.1.1 This chapter covers the minimum performance and testing requirements for controllers and

transfer switches for electric motors driving fire pumps.

10.1.1.2 Accessory devices, including fire pump alarm and signaling means, are included where

necessary to ensure the minimum performance of the equipment mentioned in 10.1.1.1.

10.1.2 Performance and Testing.

10.1.2.1 Listing. All controllers and transfer switches shall be specifically listed for electric motor–

driven fire pump service.

10.1.2.2* Marking.

10.1.2.2.1 The controller and transfer switch shall be suitable for the available short-circuit current at the

line terminals of the controller and transfer switch.

10.1.2.2.2 The controller and transfer switch shall be marked “Suitable for use on a circuit capable of

delivering not more than ____ amperes RMS symmetrical at ____ volts ac,” or “____ amperes RMS

symmetrical at ___ volts ac short-circuit current rating,” or equivalent, where the blank spaces shown

shall have appropriate values filled in for each installation.

10.1.2.3 Preshipment. All controllers shall be completely assembled, wired, and tested by the

manufacturer before shipment from the factory.

10.1.2.4 Service Equipment Listing. All controllers and transfer switches shall be listed as “suitable for

use as service equipment” where so used.

10.1.2.5 Additional Marking.

10.1.2.5.1 All controllers shall be marked “Electric Fire Pump Controller” and shall show plainly the

name of the manufacturer, identifying designation, maximum operating pressure, enclosure type

designation, and complete electrical rating.

10.1.2.5.2 Where multiple pumps serve different areas or portions of the facility, an appropriate sign shall

be conspicuously attached to each controller indicating the area, zone, or portion of the system served by

that pump or pump controller.

10.1.2.6 Service Arrangements. It shall be the responsibility of the pump manufacturer or its designated

representative to make necessary arrangements for the services of a manufacturer's representative when

needed for service and adjustment of the equipment during the installation, testing, and warranty periods.

10.1.2.7 State of Readiness. The controller shall be in a fully functional state within 10 seconds upon

application of ac power.

10.1.3* Design. All electrical control equipment design shall comply with NFPA 70, National Electrical

Code, Article 695, and other applicable documents.

10.2 Location.

10.2.1* Controllers shall be located as close as is practical to the motors they control and shall be within

sight of the motors.

10.2.2 Controllers shall be located or protected so that they will not be injured by water escaping from

pumps or pump connections.

10.2.3 Current-carrying parts of controllers shall be not less than 12 in. (305 mm) above the floor level.

10.2.4 Working clearances around controllers shall comply with NFPA 70, National Electrical Code,

Article 110.

10.3 Construction.




10.3.1 Equipment. All equipment shall be suitable for use in locations subject to a moderate degree of

moisture, such as a damp basement.

10.3.2 Mounting. All equipment shall be mounted in a substantial manner on a single noncombustible

supporting structure.

10.3.3 Enclosures.

10.3.3.1* The structure or panel shall be securely mounted in, as a minimum, a National Electrical

Manufacturers Association (NEMA) Type 2, dripproof enclosure(s).

10.3.3.2 Where the equipment is located outside, or where special environments exist, suitably rated

enclosures shall be used.

10.3.3.3 The enclosure(s) shall be grounded in accordance with NFPA 70, National Electrical Code,

Article 250.

10.3.4 Connections and Wiring.

10.3.4.1 All busbars and connections shall be readily accessible for maintenance work after installation of

the controller.

10.3.4.2 All busbars and connections shall be arranged so that disconnection of the external circuit

conductors will not be required.

10.3.4.3 Provisions shall be made within the controller to permit the use of test instruments for measuring

all line voltages and currents without disconnecting any conductors within the controller.

10.3.4.4 Means shall be provided on the exterior of the controller to read all line currents and all line

voltages with an accuracy within ±5 percent of motor nameplate voltage and current.

10.3.4.5 Continuous-Duty Basis.

10.3.4.5.1 Unless the requirements of 10.3.4.5.2 are met, busbars and other wiring elements of the

controller shall be designed on a continuous-duty basis.

10.3.4.5.2 The requirements of 10.3.4.5.1 shall not apply to conductors that are in a circuit only during

the motor starting period, which shall be permitted to be designed accordingly.

10.3.4.6 Field Connections.

10.3.4.6.1 A fire pump controller shall not be used as a junction box to supply other equipment.

10.3.4.6.2 No undervoltage, phase loss, frequency sensitive, or other sensor(s) shall be installed that

automatically or manually prohibit electrical actuation of the motor contactor.

10.3.4.7 A fire pump controller shall not be used as a junction box to supply other equipment.

10.3.4.8 Electrical supply conductors for pressure maintenance (jockey or make-up) pump(s) shall not be

connected to the fire pump controller.

10.3.5 Protection of Control Circuits.

10.3.5.1 Circuits that are necessary for proper operation of the controller shall not have overcurrent

protective devices connected in them.

10.3.5.2 The secondary of the transformer and control circuitry shall be permitted to be ungrounded.

10.3.6* External Operation. All switching equipment for manual use in connecting or disconnecting or

starting or stopping the motor shall be externally operable.

10.3.7 Electrical Diagrams and Instructions.

10.3.7.1 An electrical schematic diagram shall be provided and permanently attached to the inside of the

controller enclosure.

10.3.7.2 All the field wiring terminals shall be plainly marked to correspond with the field connection

diagram furnished.

10.3.7.3* Complete instructions covering the operation of the controller shall be provided and

conspicuously mounted on the controller.




10.3.8 Marking.

10.3.8.1 Each motor control device and each switch and circuit breaker shall be marked to plainly

indicate the name of the manufacturer, the designated identifying number, and the electrical rating in

volts, horsepower, amperes, frequency, phases, and so forth, as appropriate.

10.3.8.2 The markings shall be so located as to be visible after installation.

10.4 Components.

10.4.1* Voltage Surge Arrester.

10.4.1.1 Unless the requirements of 10.4.1.3 or 10.4.1.4 are met, a voltage surge arrester complying with

ANSI/IEEE C62.1, IEEE Standard for Gapped Silicon-Carbide Surge Arresters for AC Power Circuits,

or C62.11, IEEE Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1

kV), shall be installed from each phase to ground. (See 10.3.2.)

10.4.1.2 The surge arrester shall be rated to suppress voltage surges above line voltage.

10.4.1.3 The requirements of 10.4.1.1 and 10.4.1.2 shall not apply to controllers rated in excess of 600 V.

(See Section 10.6.)

10.4.1.4 The requirements of 10.4.1.1 and 10.4.1.2 shall not apply where the controller can withstand

without damage a 10 kV impulse in accordance with ANSI/IEEE C62.41, IEEE Recommended Practice

for Surge Voltages in Low-Voltage AC Power Circuits.

10.4.2 Isolating Switch.

10.4.2.1 General.

10.4.2.1.1 The isolating switch shall be a manually operable motor circuit switch or a molded case switch

having a horsepower rating equal to or greater than the motor horsepower.

10.4.2.1.2* A molded case switch having an ampere rating not less than 115 percent of the motor rated

full-load current and also suitable for interrupting the motor locked rotor current shall be permitted.

10.4.2.1.3 A molded case isolating switch shall be permitted to have self-protecting instantaneous short-

circuit overcurrent protection, provided that this switch does not trip unless the circuit breaker in the

same controller trips.

10.4.2.2 Externally Operable. The isolating switch shall be externally operable.

10.4.2.3* Ampere Rating. The ampere rating of the isolating switch shall be at least 115 percent of the

full-load current rating of the motor.

10.4.2.4 Warning.

10.4.2.4.1 Unless the requirements of 10.4.2.4.2 are met, the following warning shall appear on or

immediately adjacent to the isolating switch:

WARNING

DO NOT OPEN OR CLOSE THIS SWITCH WHILE

THE CIRCUIT BREAKER (DISCONNECTING MEANS)

IS IN CLOSED POSITION.

10.4.2.4.2 Instruction Label. The requirements of 10.4.2.4.1 shall not apply where the requirements of

10.4.2.4.2.1 and 10.4.2.4.2.2 are met.

10.4.2.4.2.1 Where the isolating switch and the circuit breaker are so interlocked that the isolating switch

can be neither opened nor closed while the circuit breaker is closed, the warning label shall be permitted

to be replaced with an instruction label that directs the order of operation.

10.4.2.4.2.2 This label shall be permitted to be part of the label required by 10.3.7.3.

10.4.2.5 Operating Handle.




10.4.2.5.1 Unless the requirements of 10.4.2.5.2 are met, the isolating switch operating handle shall be

provided with a spring latch that shall be so arranged that it requires the use of the other hand to hold the

latch released in order to permit opening or closing of the switch.

10.4.2.5.2 The requirements of 10.4.2.5.1 shall not apply where the isolating switch and the circuit

breaker are so interlocked that the isolating switch can be neither opened nor closed while the circuit

breaker is closed.

10.4.3 Circuit Breaker (Disconnecting Means).

10.4.3.1* General.

10.4.3.1.1 The motor branch circuit shall be protected by a circuit breaker that shall be connected directly

to the load side of the isolating switch and shall have one pole for each ungrounded circuit conductor.

10.4.3.1.2 Where the motor branch circuit is transferred to an alternate source supplied by an on-site

generator and is protected by an overcurrent device at the generator (see 9.6.5), the locked rotor

overcurrent protection within the fire pump controller shall be permitted to be bypassed when that motor

branch circuit is so connected.

10.4.3.2 Mechanical Characteristics. The circuit breaker shall have the following mechanical

characteristics:

(1) It shall be externally operable. (See 10.3.6.)

(2) It shall trip free of the handle.

(3) A nameplate with the legend “Circuit breaker — disconnecting means” in letters not less than in.

(10 mm) high shall be located on the outside of the controller enclosure adjacent to the means for

operating the circuit breaker.

10.4.3.3* Electrical Characteristics.

10.4.3.3.1 The circuit breaker shall have the following electrical characteristics:

(1) A continuous current rating not less than 115 percent of the rated full-load current of the motor

(2) Overcurrent-sensing elements of the nonthermal type

(3) Instantaneous short-circuit overcurrent protection

(4)* An adequate interrupting rating to provide the suitability rating 10.1.2.2 of the controller

(5) Capability of allowing normal and emergency starting and running of the motor without tripping

(see 10.5.3.2)

(6) An instantaneous trip setting of not more than 20 times the full-load

current

10.4.3.3.2* Current limiters, where integral parts of the circuit breaker, shall be permitted to be used to

obtain the required interrupting rating, provided all the following requirements are met:

(1) The breaker shall accept current limiters of only one rating.

(2) The current limiters shall hold 300 percent of full-load motor current for a minimum of 30

minutes.

(3) The current limiters, where installed in the breaker, shall not open at locked rotor current.

(4) A spare set of current limiters of correct rating shall be kept readily available in a compartment or

rack within the controller enclosure.

10.4.4 Locked Rotor Overcurrent Protection.

10.4.4.1 The only other overcurrent protective device that shall be required and permitted between the

isolating switch and the fire pump motor shall be located within the fire pump controller and shall

possess the following characteristics:

(1) For a squirrel-cage or wound-rotor induction motor, the device shall be as

follows:




(a) Of the time-delay type having a tripping time between 8 seconds and 20 seconds at locked rotor

current

(b) Calibrated and set at a minimum of 300 percent of motor full-load current

(2) For a direct-current motor, the device shall be as follows:

(a) Of the instantaneous type

(b) Calibrated and set at a minimum of 400 percent of motor full-load current

(3)* There shall be visual means or markings clearly indicated on the device that proper settings have

been made.

(4) It shall be possible to reset the device for operation immediately after tripping, with the tripping

characteristics thereafter remaining unchanged.

(5) Tripping shall be accomplished by opening the circuit breaker, which shall be of the external

manual reset type.

10.4.4.2 Where the motor branch circuit is transferred to an alternate source supplied by an on-site

generator whose capacity is 225 percent or less of the capacity of the fire pump motor and is protected by

an overcurrent device at the generator (see 9.6.5), the locked rotor overcurrent protection within the fire

pump controller shall be permitted to be bypassed when that motor branch circuit is so connected.

10.4.5 Motor Starting Circuitry.

10.4.5.1 Motor Contactor. The motor contactor shall be horsepower rated and shall be of the magnetic

type with a contact in each ungrounded conductor.

10.4.5.2 Timed Acceleration.

10.4.5.2.1 For electrical operation of reduced-voltage controllers, timed automatic acceleration of the

motor shall be provided.

10.4.5.2.2 The period of motor acceleration shall not exceed 10 seconds.

10.4.5.3 Starting Resistors. Starting resistors shall be designed to permit one 5-second starting operation

every 80 seconds for a period of not less than 1 hour.

10.4.5.4 Starting Reactors and Autotransformers.

10.4.5.4.1 Starting reactors and autotransformers shall comply with the requirements of ANSI/UL 508,

Standard for Industrial Control Equipment, Table 92.1.

10.4.5.4.2 Starting reactors and autotransformers over 200 hp shall be permitted to be designed to Part 3

of ANSI/UL 508, Standard for Industrial Control Equipment, Table 92.1, in lieu of Part 4.

10.4.5.5 Soft Start Units.

10.4.5.5.1 Soft start units shall be horsepower rated or specifically designed for the service.

10.4.5.5.2 The bypass contactor shall comply with 10.4.5.1.

10.4.5.5.3 Soft start units shall comply with the duty cycle requirements in accordance with 10.4.5.4.1

and 10.4.5.4.2.

10.4.5.6 Operating Coils. For controllers of 600 V or less, the operating coil(s) for any motor

contactor(s), and any bypass contactor(s), if provided, shall be supplied directly from the main power

voltage and not through a transformer.

10.4.5.7* Single-Phase Sensors.

10.4.5.7.1 Sensors shall be permitted to prevent a three-phase motor from starting under single-phase

condition.

10.4.5.7.2 Such sensors shall not cause disconnection of the motor if it is running at the time of single-

phase occurrence.




10.4.5.7.3 Such sensors shall be monitored to provide a local visible signal in the event of malfunction of

the sensors.

10.4.6* Signal Devices on Controller.

10.4.6.1 Power Available Visible Indicator.

10.4.6.1.1 A visible indicator shall monitor the availability of power in all phases at the line terminals of

the motor contactor, or of the bypass contactor, if provided.

10.4.6.1.2 If the visible indicator is a pilot lamp, it shall be accessible for replacement.

10.4.6.1.3 When power is supplied from multiple power sources, monitoring of each power source for

phase loss shall be permitted at any point electrically upstream of the line terminals of the contactor

provided all sources are monitored.

10.4.6.2 Phase Reversal.

10.4.6.2.1 Phase reversal of the power source to which the line terminals of the motor contactor are

connected shall be indicated by a visible indicator.

10.4.6.2.2 When power is supplied from multiple power sources, monitoring of each power source for

phase reversal shall be permitted at any point electrically upstream of the line terminals of the contactor,


10.4.7* Fire Pump Alarm and Signal Devices Remote from Controller.

10.4.7.1 Where the pump room is not constantly attended, audible or visible signals powered by a source

not exceeding 125 V shall be provided at a point of constant attendance.

10.4.7.2 These fire pump alarms and signals shall indicate the information in 10.4.7.2.1 through

10.4.7.2.4.

10.4.7.2.1 Pump or Motor Running. The signal shall actuate whenever the controller has operated into

a motor-running condition. This signal circuit shall be energized by a separate reliable supervised power

source or from the pump motor power, reduced to not more than 125 V.

10.4.7.2.2 Loss of Phase.

10.4.7.2.2.1 The fire pump alarm shall actuate whenever any phase at the line terminals of the motor

contactor is lost.

10.4.7.2.2.2 All phases shall be monitored. Such monitoring shall detect loss of phase whether the motor

is running or at rest.

10.4.7.2.2.3 When power is supplied from multiple power sources, monitoring of each power source for

phase loss shall be permitted at any point electrically upstream of the line terminals of the contactor,


10.4.7.2.3 Phase Reversal. (See 10.4.6.2.) This fire pump alarm circuit shall be energized by a separate

reliable supervised power source or from the pump motor power, reduced to not more than 125 V. The

fire pump alarm shall actuate whenever the three-phase power at the line terminals of the motor contactor

is reversed.

10.4.7.2.4 Controller Connected to Alternate Source. Where two sources of power are supplied to

meet the requirements of 9.3.2, this signal shall indicate whenever the alternate source is the source

supplying power to the controller. This signal circuit shall be energized by a separate, reliable, supervised

power source, reduced to not more than 125 V.

10.4.8 Controller Contacts for Remote Indication. Controllers shall be equipped with contacts (open

or closed) to operate circuits for the conditions in 10.4.7.2.1 through 10.4.7.2.3 and when a controller is

equipped with a transfer switch in accordance with 10.4.7.2.4.

10.5 Starting and Control.

10.5.1* Automatic and Nonautomatic.




10.5.1.1 An automatic controller shall be self-acting to start, run, and protect a motor.

10.5.1.2 An automatic controller shall be pressure switch actuated or nonpressure switch actuated.

10.5.1.3 An automatic controller shall be operable also as a nonautomatic controller.

10.5.1.4 A nonautomatic controller shall be actuated by manually initiated electrical means and by

manually initiated mechanical means.

10.5.2 Automatic Controller.

10.5.2.1* Water Pressure Control.

10.5.2.1.1 Pressure-Actuated Switches.

10.5.2.1.1.1 Unless the requirements of 10.5.2.1.1.2 are met, there shall be provided a pressure-actuated

switch having adjustable high- and low-calibrated set-points as part of the controller.

10.5.2.1.1.2 The requirements of 10.5.2.1.1.1 shall not apply in a nonpressure-actuated controller, where

the pressure-actuated switch shall not be required.

10.5.2.1.2 There shall be no pressure snubber or restrictive orifice employed within the pressure switch.

10.5.2.1.3 This switch shall be responsive to water pressure in the fire protection system.

10.5.2.1.4 The pressure-sensing element of the switch shall be capable of withstanding a momentary

surge pressure of 400 psi (27.6 bar) or 133 percent of fire pump controller rated operating pressure,

whichever is higher, without losing its accuracy.

10.5.2.1.5 Suitable provision shall be made for relieving pressure to the pressure-actuated switch to allow

testing of the operation of the controller and the pumping unit. [See Figure A.10.5.2.1(a) and Figure

A.10.5.2.1(b).]

10.5.2.1.6 Water pressure control shall be in accordance with 10.5.2.1.6.1 through 10.5.2.1.6.5.

10.5.2.1.6.1 Pressure switch actuation at the low adjustment setting shall initiate pump starting sequence

(if pump is not already in operation).

10.5.2.1.6.2* A listed pressure recording device shall be installed to sense and record the pressure in each

fire pump controller pressure-sensing line at the input to the controller.

10.5.2.1.6.3 The recorder shall be capable of operating for at least 7 days without being reset or

rewound.

10.5.2.1.6.4 The pressure-sensing element of the recorder shall be capable of withstanding a momentary

surge pressure of at least 400 psi (27.6 bar) or 133 percent of fire pump controller rated operating

pressure, whichever is greater, without losing its accuracy.

10.5.2.1.6.5 For variable speed pressure limiting control, a in. (15 mm) nominal size inside diameter

pressure line shall be connected between the pump discharge flange and the discharge control valve, as

appropriate.

10.5.2.2 Nonpressure Switch–Actuated Automatic Controller.

10.5.2.2.1 Nonpressure switch–actuated automatic fire pump controllers shall commence the controller's

starting sequence by the automatic opening of a remote contact(s).

10.5.2.2.2 The pressure switch shall not be required.

10.5.2.2.3 There shall be no means capable of stopping the fire pump motor except those on the fire

pump controller.

10.5.2.3 Fire Protection Equipment Control.

10.5.2.3.1 Where the pump supplies special water control equipment (deluge valves, dry pipe valves,

etc.), it shall be permitted to start the motor before the pressure-actuated switch(es) would do so.

10.5.2.3.2 Under such conditions the controller shall be equipped to start the motor upon operation of the

fire protection equipment.




10.5.2.3.3 Starting of the motor shall be initiated by the opening of the control circuit loop containing this

fire protection equipment.

10.5.2.4 Manual Electric Control at Remote Station. Where additional control stations for causing

nonautomatic continuous operation of the pumping unit, independent of the pressure-actuated switch, are

provided at locations remote from the controller, such stations shall not be operable to stop the motor.

10.5.2.5 Sequence Starting of Pumps.

10.5.2.5.1 The controller for each unit of multiple pump units shall incorporate a sequential timing device

to prevent any one driver from starting simultaneously with any other driver.

10.5.2.5.2 Each pump supplying suction pressure to another pump shall be arranged to start before the

pump it supplies.

10.5.2.5.3 If water requirements call for more than one pumping unit to operate, the units shall start at

intervals of 5 to 10 seconds.

10.5.2.5.4 Failure of a leading driver to start shall not prevent subsequent pumping units from starting.

10.5.2.6 External Circuits Connected to Controllers.

10.5.2.6.1 External control circuits that extend outside the fire pump room shall be arranged so that

failure of any external circuit (open, ground-fault, or short circuit) shall not prevent operation of pump(s)

from all other internal or external means.

10.5.2.6.2 Breakage, disconnecting, shorting of the wires, ground fault, or loss of power to these circuits

shall be permitted to cause continuous running of the fire pump but shall not prevent the controller(s)

from starting the fire pump(s) due to causes other than these external circuits.

10.5.2.6.3 All control conductors within the fire pump room that are not fault tolerant as described in

10.5.2.6.1 and 10.5.2.6.2 shall be protected against mechanical injury.

10.5.3 Nonautomatic Controller.

10.5.3.1 Manual Electric Control at Controller.

10.5.3.1.1 There shall be a manually operated switch on the control panel so arranged that, when the

motor is started manually, its operation cannot be affected by the pressure-actuated switch.

10.5.3.1.2 The arrangement shall also provide that the unit will remain in operation until manually shut

down.

10.5.3.2* Emergency-Run Mechanical Control at Controller.

10.5.3.2.1 The controller shall be equipped with an emergency-run handle or lever that operates to

mechanically close the motor-circuit switching mechanism.

10.5.3.2.1.1 This handle or lever shall provide for nonautomatic continuous running operation of the

motor(s), independent of any electric control circuits, magnets, or equivalent devices and independent of

the pressure-activated control switch.

10.5.3.2.1.2 Means shall be incorporated for mechanically latching or holding the handle or lever for

manual operation in the actuated position.

10.5.3.2.1.3 The mechanical latching shall not be automatic, but at the option of the operator.

10.5.3.2.2 The handle or lever shall be arranged to move in one direction only from the off position to the

final position.

10.5.3.2.3 The motor starter shall return automatically to the off position in case the operator releases the

starter handle or lever in any position but the full running position.

10.5.4 Methods of Stopping. Shutdown shall be accomplished by the methods in 10.5.4.1 and 10.5.4.2.

10.5.4.1 Manual. Manual shutdown shall be accomplished by operation of a pushbutton on the outside of

the controller enclosure that, in the case of automatic controllers, shall return the controller to the full

automatic position.




10.5.4.2 Automatic Shutdown After Automatic Start. Where provided, automatic shutdown after

automatic start shall comply with the following:

(1) Unless the requirements of 10.5.4.2(3) are met, automatic shutdown shall be permitted only where

the controller is arranged for automatic shutdown after all starting and running causes have returned to

normal.

(2) A running period timer set for at least 10 minutes running time shall be permitted to commence at

initial operation.

(3) The requirements of 10.5.4.2(1) shall not apply and automatic shutdown shall not be permitted

where the pump constitutes the sole supply of a fire sprinkler or standpipe system or where the authority

having jurisdiction has required manual shutdown.

10.6 Controllers Rated in Excess of 600 V.

10.6.1 Control Equipment. Controllers rated in excess of 600 V shall comply with the requirements of

Chapter 10, except as provided in 10.6.2 through 10.6.8.

10.6.2 Provisions for Testing.

10.6.2.1 The provisions of 10.3.4.3 and 10.3.4.4 shall not apply.

10.6.2.2 An ammeter(s) shall be provided on the controller with a suitable means for reading the current

in each phase.

10.6.2.3 An indicating voltmeter(s), deriving power of not more than 125 V from a transformer(s)

connected to the high-voltage supply, shall also be provided with a suitable means for reading each phase

voltage.

10.6.3 Disconnecting Under Load.

10.6.3.1 Provisions shall be made to prevent the isolating switch from being opened under load.

10.6.3.2 A load-break disconnecting means shall be permitted to be used in lieu of the isolating switch if

the fault closing and interrupting ratings equal or exceed the requirements of the installation.

10.6.4 Pressure-Actuated Switch Location. Special precautions shall be taken in locating the pressure-

actuated switch called for in 10.5.2.1 to prevent any water leakage from coming in contact with high-

voltage components.

10.6.5 Low-Voltage Control Circuit.

10.6.5.1 The low-voltage control circuit shall be supplied from the high-voltage source through a

stepdown transformer(s) protected by high-voltage fuses in each primary line.

10.6.5.2 The transformer power supply shall be interrupted when the isolating switch is in the open

position.

10.6.5.3 The secondary of the transformer and control circuitry shall otherwise comply with 10.3.5.

10.6.5.4 One secondary line shall be grounded unless all control and operator devices are rated for use at

the high (primary) voltage.

10.6.6 Indicators on Controller.

10.6.6.1 Specifications for controllers rated in excess of 600 V differ from those in 10.4.6.

10.6.6.2 A visible indicator shall be provided to indicate that power is available.

10.6.6.3 The current supply for the visible indicator shall come from the secondary of the control circuit

transformer through resistors, if found necessary, or from a small-capacity stepdown transformer, which

shall reduce the control transformer secondary voltage to that required for the visible indicator.

10.6.6.4 If the visible indicator is a pilot lamp, it shall be accessible for replacement.

10.6.7 Protection of Personnel from High Voltage. Necessary provisions shall be made, including such

interlocks as might be needed, to protect personnel from accidental contact with high voltage.




10.6.8 Disconnecting Means. A contactor in combination with current-limiting motor circuit fuses shall

be permitted to be used in lieu of the circuit breaker (disconnecting means) required in 10.4.3.1.1 if all of

the following requirements are met:

(1) Current-limiting motor circuit fuses shall be mounted in the enclosure between the isolating switch

and the contactor and shall interrupt the short-circuit current available at the controller input terminals.

(2) These fuses shall have an adequate interrupting rating to provide the suitability rating (see

10.1.2.2) of the controller.

(3) The current-limiting fuses shall be sized to hold 600 percent of the full-load current rating of the

motor for at least 100 seconds.

(4) A spare set of fuses of the correct rating shall be kept readily available in a compartment or rack

within the controller enclosure.

10.6.9 Locked Rotor Overcurrent Protection.

10.6.9.1 Tripping of the locked rotor overcurrent device required by 10.4.4 shall be permitted to be

accomplished by opening the motor contactor coil circuit(s) to drop out the contactor.

10.6.9.2 Means shall be provided to restore the controller to normal operation by an external manually

reset device.

10.6.10 Emergency-Run Mechanical Control at Controller.

10.6.10.1 The controller shall comply with 10.5.3.2.1 and 10.5.3.2.2 except that the mechanical latching

can be automatic.

10.6.10.2 Where the contactor is latched in, the locked rotor overcurrent protection of 10.4.4 shall not be

required.

10.7* Limited Service Controllers.

10.7.1 Limitations. Limited service controllers consisting of automatic controllers for across-the-line

starting of squirrel-cage motors of 30 hp or less, 600 V or less, shall be permitted to be installed where

such use is acceptable to the authority having jurisdiction.

10.7.2 Requirements. The provisions of Sections 10.1 through 10.5 shall apply, unless specifically

addressed in 10.7.2.1 through 10.7.2.4.

10.7.2.1 In lieu of 10.4.3.3.1(2) and 10.4.4, the locked rotor overcurrent protection shall be permitted to

be achieved by using an inverse time nonadjustable circuit breaker having a standard rating between 150

percent and 250 percent of the motor full-load current.

10.7.2.2 In lieu of 10.1.2.5.1, each controller shall be marked “Limited Service Controller” and shall

show plainly the name of the manufacturer, the identifying designation, and the complete electrical

rating.

10.7.2.3 The controller shall have a short-circuit current rating not less than 10,000 A.

10.7.2.4 The manually operated isolating switch specified in 10.4.2 shall not be required.

10.8* Power Transfer for Alternate Power Supply.

10.8.1 General.

10.8.1.1 Where required by the authority having jurisdiction or to meet the requirements of 9.3.2 where

an on-site electrical power transfer device is used for power source selection, such switch shall comply

with the provisions of Section 10.8 as well as Sections 10.1, 10.2, and 10.3 and 10.4.1.

10.8.1.2 Manual transfer switches shall not be used to transfer power between the normal supply and the

alternate supply to the fire pump controller.

10.8.1.3 No remote device(s) shall be installed that will prevent automatic operation of the transfer

switch.

10.8.2* Fire Pump Controller and Transfer Switch Arrangements.




10.8.2.1 Arrangement I (Listed Combination Fire Pump Controller and Power Transfer Switch).

10.8.2.1.1 Self-Contained Power Switching Assembly. Where the power transfer switch consists of a

self-contained power switching assembly, such assembly shall be housed in a barriered compartment of

the fire pump controller or in a separate enclosure attached to the controller and marked “Fire Pump

Power Transfer Switch.”

10.8.2.1.2 Isolating Switch.

10.8.2.1.2.1 An isolating switch, complying with 10.4.2, located within the power transfer switch

enclosure or compartment shall be provided ahead of the alternate input terminals of the transfer switch.

10.8.2.1.2.2 The isolating switch shall be suitable for the available short circuit of the alternate source.

10.8.2.1.3 Alternate Source — Second Utility Power Source. Where the alternate source is provided by

a second utility power source, the transfer switch emergency side shall be provided with an isolation

switch complying with 10.4.2 and a circuit breaker complying with 10.4.3 and 10.4.4.

10.8.2.1.4 Where the alternate source is supplied by one or more upstream transfer switches that can

singly or in combination feed utility or on-site generated power to the fire pump controller, the controller

shall be equipped with the alternate side circuit breaker and isolating switch in accordance with

10.8.2.1.3.

10.8.2.1.5 Where the alternate source is supplied by a generator whose capacity exceeds 225 percent of

the fire pump motor's rated full-load current, the controller shall be equipped with the alternate side

circuit breaker and isolating switch in accordance with 10.8.2.1.3.

10.8.2.1.6 Cautionary Marking. The fire pump controller and transfer switch (see 10.8.2.1) shall each

have a cautionary marking to indicate that the isolation switch for both the controller and the transfer

switch is opened before servicing the controller, transfer switch, or motor.

10.8.2.2 Arrangement II (Individually Listed Fire Pump Controller and Power Transfer Switch). The following shall be provided:

(1) A fire pump controller power transfer switch complying with Sections 9.6 and 10.8 and a fire

pump controller shall be provided.

(2) An isolating switch, or service disconnect where required, ahead of the normal input terminals of

the transfer switch shall be provided.

(3) The transfer switch overcurrent protection shall be selected or set to indefinitely carry the locked

rotor current of the fire pump motor where the alternate source is supplied by a second utility.

(4) An isolating switch ahead of the alternate source input terminals of the transfer switch shall meet

the following requirements:

(a) The isolating switch shall be lockable in the on position.

(b) A placard shall be externally installed on the isolating switch stating “Fire Pump Isolating Switch,”

with letters at least 1 in. (25 mm) in height.

(c) A placard shall be placed adjacent to the fire pump controller stating the location of the isolating

switch and the location of the key (if the isolating switch is locked).

(d) The isolating switch shall be supervised to indicate when it is not closed, by one of the following

methods:

i. Central station, proprietary, or remote station signal service

ii. Local signaling service that will cause the sounding of an audible signal at a constantly attended

point

iii. Locking the isolating switch closed

iv. Sealing of isolating switches and approved weekly recorded inspections where isolating switches

are located within fenced enclosures or in buildings under the control of the owner




(e) This supervision shall operate an audible and visible signal on the transfer switch and permit

monitoring at a remote point where required.

10.8.2.3 Transfer Switch. Each fire pump shall have its own dedicated transfer switch(es) where a

transfer switch(es) is required.

10.8.3 Power Transfer Switch Requirements.

10.8.3.1 Listing. The power transfer switch shall be specifically listed for fire pump service.

10.8.3.2 Suitability. The power transfer switch shall be suitable for the available short-circuit currents at

the transfer switch normal and alternate input terminals.

10.8.3.3 Electrically Operated and Mechanically Held. The power transfer switch shall be electrically

operated and mechanically held.

10.8.3.4 Horsepower or Ampere Rating.

10.8.3.4.1 Where rated in horsepower, the power transfer switch shall have a horsepower rating at least

equal to the motor horsepower.

10.8.3.4.2 Where rated in amperes, the power transfer switch shall have an ampere rating not less than

115 percent of the motor full-load current and also suitable for switching the motor locked rotor current.

10.8.3.5 Manual Means of Operation.

10.8.3.5.1 A means for safe manual (nonelectrical) operation of the power transfer switch shall be

provided.

10.8.3.5.2 This manual means shall not be required to be externally operable.

10.8.3.6 Undervoltage-Sensing Devices. Unless the requirements of 10.8.3.6.5 are met, the requirements

of 10.8.3.6.1 through 10.8.3.6.4 shall apply. Turning off the normal source isolating switch or the normal

source circuit breaker shall not inhibit the transfer switch from operating as required by 10.8.3.6.1

through 10.8.3.6.4.

10.8.3.6.1 The power transfer switch shall be provided with undervoltage-sensing devices to monitor all

ungrounded lines of the normal power source.

10.8.3.6.2 Where the voltage on any phase at the load terminals of the circuit breaker within the fire

pump controller falls below 85 percent of motor-rated voltage, the power transfer switch shall

automatically initiate starting of the standby generator, if provided and not running, and initiate transfer

to the alternate source.

10.8.3.6.3 Where the voltage on all phases of the normal source returns to within acceptable limits, the

fire pump controller shall be permitted to be retransferred to the normal source.

10.8.3.6.4 Phase reversal of the normal source power (see 10.4.6.2) shall cause a simulated normal source

power failure upon sensing phase reversal.

10.8.3.6.5 The requirements of 10.8.3.6.1 through 10.8.3.6.4 shall not apply where the power transfer

switch is electrically upstream of the fire pump controller circuit breaker, and voltage shall be permitted

to be sensed at the input to the power transfer switch in lieu of at the load terminals of the fire pump

controller circuit breaker.

10.8.3.7 Voltage- and Frequency-Sensing Devices. Unless the requirements of 10.8.3.7.3 are met, the

requirements of 10.8.3.7.1 and 10.8.3.7.2 shall apply.

10.8.3.7.1 Voltage- and frequency-sensing devices shall be provided to monitor at least one ungrounded

conductor of the alternate power source.

10.8.3.7.2 Transfer to the alternate source shall be inhibited until there is adequate voltage and frequency

to serve the fire pump load.




10.8.3.7.3 Where the alternate source is provided by a second utility power source, the requirements of

10.8.3.7.1 and 10.8.3.7.2 shall not apply, and undervoltage-sensing devices shall monitor all ungrounded

conductors in lieu of a frequency-sensing device.

10.8.3.8 Visible Indicators. Two visible indicators shall be provided to externally indicate the power

source to which the fire pump controller is connected.

10.8.3.9 Retransfer.

10.8.3.9.1 Means shall be provided to delay retransfer from the alternate power source to the normal

source until the normal source is stabilized.

10.8.3.9.2 This time delay shall be automatically bypassed if the alternate source fails.

10.8.3.10 In-Rush Currents. Means shall be provided to prevent higher than normal in-rush currents

when transferring the fire pump motor from one source to the other.

10.8.3.11 Overcurrent Protection. The power transfer switch shall not have integral short circuit or

overcurrent protection.

10.8.3.12 Additional Requirements. The following shall be provided:

(1) A device to delay starting of the alternate source generator to prevent nuisance starting in the event

of momentary dips and interruptions of the normal source

(2) A circuit loop to the alternate source generator whereby either the opening or closing of the circuit

will start the alternate source generator (when commanded by the power transfer switch) (see 10.8.3.6)

(3) A means to prevent sending of the signal for starting of the alternate source generator when

commanded by the power transfer switch, if the alternate isolating switch or the alternate circuit breaker

(if installed) is in open or tripped position

10.8.3.12.1 The alternate isolating switch and the alternate circuit breaker (if installed) shall be monitored

to indicate when one of them is in open or tripped position, as specified in 10.8.3.12(3).

10.8.3.12.2 When interlocked, monitoring of both switches in 10.8.3.12.1 shall not be required.

10.8.3.12.3 Supervision shall operate an audible and visible signal on the fire pump controller/automatic

transfer switch combination and permit monitoring at a remote point where required.

10.8.3.13 Momentary Test Switch. A momentary test switch, externally operable, shall be provided on

the enclosure that will simulate a normal power source failure.

10.8.3.14 Remote Indication. Auxiliary open or closed contacts mechanically operated by the fire pump

power transfer switch mechanism shall be provided for remote indication in accordance with 10.4.8.

10.9 Controllers for Additive Pump Motors.

10.9.1 Control Equipment. Controllers for additive pump motors shall comply with the requirements of

Sections 10.1 through 10.5 or Section 10.7 (and Section 10.8, where required) unless specifically

addressed in 10.9.2 through 10.9.5.

10.9.2 Automatic Starting. In lieu of the pressure-actuated switch described in 10.5.2.1, automatic

starting shall be capable of being accomplished by the automatic opening of a closed circuit loop

containing this fire protection equipment.

10.9.3 Methods of Stopping.

10.9.3.1 Manual shutdown shall be provided.

10.9.3.2 Automatic shutdown shall not be permitted.

10.9.4 Lockout.

10.9.4.1 Where required, the controller shall contain a lockout feature where used in a duty-standby

application.

10.9.4.2 Where supplied, this lockout shall be indicated by a visible indicator and provisions for

annunciating the condition at a remote location.




10.9.5 Marking. The controller shall be marked “Additive Pump Controller.”

10.10* Controllers with Variable Speed Pressure Limiting Control.

10.10.1 Control Equipment.

10.10.1.1 Controllers equipped with variable speed pressure limiting control shall comply with the

requirements of Chapter 10, except as provided in 10.10.1 through 10.10.11.

10.10.1.2 Controllers with variable speed pressure limiting control shall be listed for fire service.

10.10.1.3 Variable Speed Pressure Limiting Control. The variable speed pressure limiting control shall

have a horsepower rating at least equal to the motor horsepower or, where rated in amperes, shall have an

ampere rating not less than the motor full-load current.

10.10.2 Additional Marking. In addition to the markings required in 10.1.2.5.1, the controller shall be

marked with the maximum ambient temperature rating.

10.10.3* Bypass Operation.

10.10.3.1* Upon failure of the variable speed pressure limiting control to keep the system pressure at or

above the set pressure of the variable speed pressure limiting control system, the controller shall bypass

and isolate the variable speed pressure limiting control system and operate the pump at rated speed.

10.10.3.1.1 Low Pressure. If the system pressure remains below the set pressure for more than 15

seconds, the bypass operation shall occur.

10.10.3.1.2* Drive Not Operational. If the variable speed drive indicates that it is not operational within

5 seconds, the bypass operation shall occur.

10.10.3.1.3* Means shall be provided to prevent higher than normal in-rush currents when transferring

the fire pump motor from the variable speed mode to the bypass mode.

10.10.3.2 Once the variable speed pressure limiting control is bypassed, the unit shall remain bypassed

until shut down.

10.10.3.3 The bypass contactors shall be operable using the emergency-run handle or lever defined in

10.5.3.2.

10.10.4 Isolation.

10.10.4.1 The variable speed drive shall be line and load isolated when not in operation.

10.10.4.2 The variable speed drive load isolation contactor and the bypass contactor shall be

mechanically and electrically interlocked to prevent simultaneous closure.

10.10.5* Circuit Protection.

10.10.5.1 Separate variable speed drive circuit protection shall be provided between the line side of the

variable speed drive and the load side of the circuit breaker required in 10.4.3.

10.10.5.2 The circuit protection required in 10.10.5.1 shall be coordinated such that the circuit breaker in

10.4.3 does not trip due to a fault condition in the variable speed circuitry.

10.10.6 Power Quality.

10.10.6.1 Power quality correction equipment shall be located in the variable speed circuit. As a

minimum, 5 percent line reactance shall be provided.

10.10.6.2 Coordination shall not be required where the system voltage does not exceed 480 V and cable

lengths between the motor and controller do not exceed 100 ft (30.5 m) (see 10.10.6.3).

10.10.6.3* Where higher system voltages or longer cable lengths exist, the cable length and motor

requirements shall be coordinated.

10.10.7 Local Control.

10.10.7.1 All control devices required to keep the controller in automatic operation shall be within

lockable cabinets.




10.10.7.2 The variable speed pressure sensing element connected in accordance with 10.5.2.1.6.5 shall

only be used to control the variable speed drive.

10.10.7.3 Means shall be provided to manually select between variable speed and bypass mode.

10.10.7.4 Common pressure control shall not be used for multiple pump installations. Each controller

pressure sensing control circuit shall operate independently.

10.10.8 Indicating Devices on Controller.

10.10.8.1 Drive Failure. A visible indicator shall be provided to indicate when the variable speed drive

has failed.

10.10.8.2 Bypass Mode. A visible indicator shall be provided to indicate when the controller is in

bypass mode.

10.10.8.3 Variable Speed Pressure Limiting Control Overpressure. Visible indication shall be

provided on all controllers equipped with variable speed pressure limiting control to actuate at 115

percent of set pressure.

10.10.9 Controller Contacts for Remote Indication. Controllers shall be equipped with contacts (open

or closed) to operate circuits for the conditions in 10.10.8.

10.10.10 System Performance.

10.10.10.1* The controller shall be provided with suitable adjusting means to account for various field

conditions.

10.10.10.2 Operation at reduced speed shall not result in motor overheating.

10.10.10.3 The maximum operating frequency shall not exceed line frequency.

10.10.11 Critical Settings. Means shall be provided and permanently attached to the inside of the

controller enclosure to record the following settings:

(1) Variable speed pressure limiting set point setting

(2) Pump start pressure

(3) Pump stop pressure




C. THE FOLLOWING PAGES INCLUDE TABLES FOR MOTOR BRANCH CIRCUIT SIZING AND FOR

SHORT CIRCUIT PROTECTION

(KEEP IN MIND THAT A MOTOR’S OVERCURRENT PROTECTION IS ACCOMPLISHED BY

OVERLOADS WITHIN THE STARTER OR MOTOR. THE TABLE SHOWS THE MAXIMUM SHORT

CIRCUIT PROTECTION, WHICH IS HIGHER THAN CERTAIN MANUFACTURERS’ SLIDE RULE

CALCULATORS. USE CAUTION IF YOU USE THESE SLIDE RULES BECAUSE NUISANCE TRIPPING

COULD BE EXPERIENCED. IF YOU USE M/E’S STANDARDS, YOU WON’T HAVE THIS ISSUE. YOU

CAN DOWNSIZE FROM THE NOTED BREAKER SIZE IN THE TABLES IF YOU RUN INTO CIRCUIT

BREAKER FRAME SIZES THAT WON’T FIT IN THE PANELBOARD YOU HAVE AVAILABLE, BUT

CONFIRM THE BREAKER SIZE WILL BE ADEQUATE FOR THE MOTOR INRUSH CURRENT, SIX

TIMES FLA. THE TABLE ON THE FOLLOWING PAGE IS FROM THE NEC AND YOU SHOULD

NOTICE THAT THESE REQUIREMENTS MATCH THE TABLES THAT FOLLOW IT.)




Table 430.52 Maximum Rating or Setting of Motor Branch-Circuit Short-Circuit and Ground-Fault

Protective Devices

Percentage of Full-Load Current

Type of Motor

Nontime

Delay

Fuse1

Dual Element

(Time-Delay)

Fuse1

Instantaneous

Trip

Breaker

Inverse

Time

Breaker2

Single-phase motors 300 175 800 250

AC polyphase motors

other than wound-rotor

300 175 800 250

Squirrel cage — other

than Design B energy-

efficient

300 175 800 250

Design B energy-efficient

300 175 1100 250

Synchronous3 300 175 800 250

Wound rotor 150 150 800 150

Direct current (constant

voltage)

150 150 250 150

Note: For certain exceptions to the values specified, see 430.54.

1The values in the Nontime Delay Fuse column apply to Time-Delay Class CC fuses.

2The values given in the last column also cover the ratings of nonadjustable inverse time types of circuit

breakers that may be modified as in 430.52(C)(1), Exception No. 1 and No. 2.

3Synchronous motors of the low-torque, low-speed type (usually 450 rpm or lower), such as are used to

drive reciprocating compressors, pumps, and so forth, that start unloaded, do not require a fuse rating or

circuit-breaker setting in excess of 200 percent of full-load current.

Exception No. 1: Where the values for branch-circuit short-circuit and ground-fault protective devices

determined by Table 430.52 do not correspond to the standard sizes or ratings of fuses, nonadjustable circuit

breakers, thermal protective devices, or possible settings of adjustable circuit breakers, a higher size, rating,

or possible setting that does not exceed the next higher standard ampere rating shall be permitted.

Exception No. 2: Where the rating specified in Table 430.52, or the rating modified by Exception No. 1, is not

sufficient for the starting current of the motor:

(a) The rating of a nontime-delay fuse not exceeding 600 amperes or a time-delay Class CC fuse shall be

permitted to be increased but shall in no case exceed 400 percent of the full-load current.

(b) The rating of a time-delay (dual-element) fuse shall be permitted to be increased but shall in no case

exceed 225 percent of the full-load current.

(c) The rating of an inverse time circuit breaker shall be permitted to be increased but shall in no case exceed

400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than

100 amperes.




(d) The rating of a fuse of 601–6000 ampere classification shall be permitted to be increased but shall in no

case exceed 300 percent of the full-load current.




D. THE FOLLOWING PAGES INCLUDE INFORMATION PERTAINING TO CONDUIT, CABLE, CABLE

DERATING, CONDUIT FILL, GROUND CONDUCTOR/GROUNDING CONDUCTOR SIZING AND

VOLTAGE DROP. VOLTAGE DROP CAN ALSO BE FOUND BY USING THE FOLLOWING LINK,

Voltage Drop Calculator.

ALSO, REFER TO ONE LINE DIAGRAM EXAMPLES IN THE NEXT SECTION.




E. THE FOLLOWING PAGES SHOW EXAMPLES OF ONE LINE DIAGRAMS. ALTHOUGH SMALL

SCALE AND SHOWN IN TWO PAGES FOR EACH ONE LINE, THEY ARE MEANT TO GIVE THE

INTENT OF THE DIAGRAM. THE SECOND EXAMPLE COULD BE TITLED RISER DIAGRAM SINCE

IT DEPICTS DISTRIBUTION BY FLOORS OF A BUILDING.

ITEMS THAT SHOULD BE INLCUDE ARE TRANSFORMER VOLTAGES/KVA, SCHEDULES, LEGEND,

BUS AMPERAGE/FAULT CURRENT, ETC. THE MAIN ITEM IS TO DEVELOP A ONE LINE DIAGRAM

WHERE YOU DON’T HAVE TO REFERENCE TO SEVERAL DRAWINGS TO FIGURE OUT A SYSTEM.

THE EXAMPLES ARE FROM A LARGE SYSTEM THAT HAD TO BE BROKE DOWN INTO

NUMEROUS SHEETS, BUT EACH SHEET IS SELF EXPLANATORY.




F. THE FOLLOWING PAGES INCLUDE INFORMATION PERTAINING TO TRANSFORMERS WITH

COORDINATION CURVES TO 1500 KVA FOR 480 DELTA TO 208Y/120 VOLT TRANSFORMERS.

IMPEDANCE DATA IS ALSO INCLUDED FOR FAULT CURRENT CALCULATIONS. YOU CAN ALSO

INPUT THE CLOSEST IMPEDANCE INTO THE “FAULT CURRENT CALCULATOR” FOR QUICK

CALCULATIONS.

TRANSFORMER LOSS DATA SHOULD BE GIVEN TO THE HVAC ENGINEER TO DESIGN ROOM

VENTILATION REQUIREMENTS.

EXCERPTS FROM THE NEC SHOW MAXIMUM OVERCURRENT PROTECTION REQUIREMENTS.

HEED THIS INFORMATION. MANY OF OUT INSTALLATIONS ARE HARD TO COORDINATE

BECAUSE THE PRIMARY AND SECONDARY PROTECTION IS NOT SIZED PROPERLY.




TX Inrush

18 A

1317 A

65 A65 A

380 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .0 1 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000

C U R R E N T IN A M P E R E S

TIM

E IN

SECONDS

PD-0001

C UTLE R-HA MM ER E HB , 2 & 3-P ole E HB Trip 50 AS ett ing s Pha se Fixed

15 KVA

PD-0002

CUTL ER -H AM ME R EH B, 2 & 3-P ole EH B Trip 50 ASe ttings P hase Fixed

3-#6

4-#6

CBL-0003

PD-0001

C UTLE R-HA MM ER E HB , 2 & 3-P ole E HB Trip 50 AS ett ing s Pha se Fixed

15 KVA

PD-0002

CUTL ER -H AM ME R EH B, 2 & 3-P ole EH B Trip 50 ASe ttings P hase Fixed

3-#6

4-#6

CBL-0003

TCC Name: 15KVA Current Scale x 1 Reference Voltage: 480 Oneline: SKM Systems A nalysis, Inc. April 17, 2008 12:04 PM Consultant: M /E E ngineering, P.C.P roject: 15 kVA Transformer Protection Engineer: William T. Gonsa, P.E.

480-208Y/120

PD-0001

BUS-0001

3-#6

S

P

15 KVA

PD-0002

BUS-0003

UTIL -0001

4-#6

CBL-0003




TX Inrush

36 A

1794 A

115 A115 A

380 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

PD-0001

CU TLER-HAMMER FD FD Trip 90 ASettings Pha se Fixed

30 KVA

PD-0002

CU TLE R-HAMM ER FD FD Trip 100 ASettings P hase Fixed

3-#2

4-#2

CBL-0003

PD-0001

CU TLER-HAMMER FD FD Trip 90 ASettings Pha se Fixed

30 KVA

PD-0002

CU TLE R-HAMM ER FD FD Trip 100 ASettings P hase Fixed

3-#2

4-#2

CBL-0003

TCC Name: 30KVA Current Scale x 10 Reference Voltage: 480 Oneline: SKM Systems Analysis, Inc. April 17, 2008 12:14 PM Consultant: M/E Engineering, P.C.Project: 30 kVA Transformer Protection Engineer: William T. Gonsa, P.E.

PD-0001

B US-0001

3-#2

S

P 30 KVA

PD-0002

B US-0003

UTIL-0001

4-#2

C BL-0003




130 A

TX Inrush

54 A

3202 A

115 A

380 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

PD-0001

C UTLER-HA MM ER FD FD T rip 1 25 ASet tin gs Phase Fixed

3-#1

45 KVA

PD-0002

CUTLER-HAM MER FD FD Trip 1 50 ASe ttin gs Phase Fixed

4-#1/0

CBL-0003

PD-0001

C UTLER-HA MM ER FD FD T rip 1 25 ASet tin gs Phase Fixed

3-#1

45 KVA

PD-0002

CUTLER-HAM MER FD FD Trip 1 50 ASe ttin gs Phase Fixed

4-#1/0

CBL-0003


PD-0001

B US-0001

3-#1

S

P 45 KVA

PD-0002

B US-0003

UTIL-0001

4-#1/0

C BL-0003




230 A

TX Inrush

90 A

5765 A

255 A

380 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

PD-0001

CUTLER-HAM MER FD FD Trip 2 25 ASe ttin gs Ph ase Fixed

3-#4/0

75 KVA

PD-0002

CUTLER-HAM MER HKD HKD Trip 2 50 ASe ttin gs Ph ase The rmal Cu rve (Fixe d) INST (5-10 x Trip) 5 (12 50A )

4-#250 KCMIL

CBL-0003

PD-0001

CUTLER-HAM MER FD FD Trip 2 25 ASe ttin gs Ph ase Fixed

3-#4/0

75 KVA

PD-0002

CUTLER-HAM MER HKD HKD Trip 2 50 ASe ttin gs Ph ase The rmal Cu rve (Fixe d) INST (5-10 x Trip) 5 (12 50A )

4-#250 KCMIL

CBL-0003


PD-0001

BUS-0001

3-#4/0

S

P 75 KVA

PD-0002

BUS-0003

UTIL -0001

4-#250 KCMIL

CBL-0003




380 A

TX Inrush

135 A

6349 A

380 A

760 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

PD-0001

CUTLER -H AM MER CHK D, R MS 310 CHK D Trip 4 00 APlug 400 ASe ttin gs P hase P lu g Adj (2 00-400A) 35 0A (350A ) LTD (Fixed) Fixed STPU (2-8 x LTPU) 8 (28 00A) STD (Inst -30 0 m s) 10 0 ms(I^2 T Out ) INST (4000A) Fixed (40 00A )

3-#500 KCMIL

112.5 KVA

PD-0002


4-#500 KCMIL

CBL-0003

PD-0001


3-#500 KCMIL

112.5 KVA

PD-0002


4-#500 KCMIL

CBL-0003

TCC Name: 112.5KVA Current Scale x 10 Reference Voltage: 480 Oneline: SKM Systems Analysis, Inc. April 17, 2008 12:22 PM Consultant: M/E Engineering, P.C.Project: 112.5 kVA Transformer Protection Engineer: William T. Gonsa, P.E.

PD-0001

BUS-0001

3-#500 KCMIL

S

P 112.5 KVA

PD-0002

BUS-0003

UTIL -0001

4-#500 KCMIL

CBL-0003




460 A

TX Inrush

180 A

8525 A

620 A

760 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

C UTLER-HA MM ER C HLD, Op tim 550/750/1050 C HLD Trip 60 0 AP lug 50 0 ASetting s Pha se LTP U (0.4 -1.0 x P ) 0 .9 (450A) LTD I4t (1-5 Sec.) 1 STPU (1 .5-8 x LTPU) 1.5 (6 75A) STD (0.1-0.5 Se c.) 0.23(I^2 T Out) INST (2-8 x P) 8 (4000 A) INST (1.0 x S T R ating) Fixed (5500A )

2-3-4/0

150 KVA

PD-0002

CU TLER-HAMMER CH LD, Op tim 550/7 50/1 050 CH LD Trip 600 AP lu g 60 0 AS ettings P hase LTP U (0.4-1.0 x P) 0 .9 (540A) LTD I4 t (1-5 S ec.) 1.7 STPU (1.5-8 x LTPU) 2.1 (11 34A) STD (0 .1-0.5 Se c.) 0.1 (I ^2 T Ou t) INST (2-8 x P) 6.8 (4080 A) INST (1.0 x S T Ra tin g) Fixed (5 500A )

2-4-350 KCMIL

CBL-0003

C UTLER-HA MM ER C HLD, Op tim 550/750/1050 C HLD Trip 60 0 AP lug 50 0 ASetting s Pha se LTP U (0.4 -1.0 x P ) 0 .9 (450A) LTD I4t (1-5 Sec.) 1 STPU (1 .5-8 x LTPU) 1.5 (6 75A) STD (0.1-0.5 Se c.) 0.23(I^2 T Out) INST (2-8 x P) 8 (4000 A) INST (1.0 x S T R ating) Fixed (5500A )

2-3-4/0

150 KVA

PD-0002

CU TLER-HAMMER CH LD, Op tim 550/7 50/1 050 CH LD Trip 600 AP lu g 60 0 AS ettings P hase LTP U (0.4-1.0 x P) 0 .9 (540A) LTD I4 t (1-5 S ec.) 1.7 STPU (1.5-8 x LTPU) 2.1 (11 34A) STD (0 .1-0.5 Se c.) 0.1 (I ^2 T Ou t) INST (2-8 x P) 6.8 (4080 A) INST (1.0 x S T Ra tin g) Fixed (5 500A )

2-4-350 KCMIL

CBL-0003


PD-0001

BUS-0001

2-3-4/0

S

P 150 KVA

PD-0002

BUS-0003

UTIL-0001

2-4-350 KCMIL

CBL-0003




760 A

TX Inrush

271 A

11057 A

760 A

1140 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

CU TLER-HAMM ER CH ND, Op tim 550 /750 /105 0 CH ND Trip 80 0 AP lu g 70 0 ASetting s Phase LTPU (0.4-1.0 x P) 1 (70 0A) LTD I4t (1-5 Sec.) 1 STPU (1 .5-8 x LTP U) 4 (280 0A) STD (0.1-0.5 Se c.) 0.3 6(I^2 T Ou t) INST (2-8 x P) 8 (5600A) INST (16000A) Fixed (16000A)

2-3-500 KCMIL

225 KVA

PD-0002

C UTLER-HAMM ER C HND, Op tim 550 /750 /105 0 C HND Trip 80 0 AP lug 80 0 ASett ing s Phase LTPU (0.4 -1 .0 x P) 1 (8 00A) LTD I4t (1-5 Sec.) 1 STPU (1 .5-8 x LTPU) 5 (400 0A) STD (0.1-0.5 Sec.) 0.1(I^2 T Ou t) INST (2-8 x P) 4.9 (392 0A) INST (16000A) Fixed (1 6000 A)

2-4-500 KCMIL

CBL-0003

CU TLER-HAMM ER CH ND, Op tim 550 /750 /105 0 CH ND Trip 80 0 AP lu g 70 0 ASetting s Phase LTPU (0.4-1.0 x P) 1 (70 0A) LTD I4t (1-5 Sec.) 1 STPU (1 .5-8 x LTP U) 4 (280 0A) STD (0.1-0.5 Se c.) 0.3 6(I^2 T Ou t) INST (2-8 x P) 8 (5600A) INST (16000A) Fixed (16000A)

2-3-500 KCMIL

225 KVA

PD-0002

C UTLER-HAMM ER C HND, Op tim 550 /750 /105 0 C HND Trip 80 0 AP lug 80 0 ASett ing s Phase LTPU (0.4 -1 .0 x P) 1 (8 00A) LTD I4t (1-5 Sec.) 1 STPU (1 .5-8 x LTPU) 5 (400 0A) STD (0.1-0.5 Sec.) 0.1(I^2 T Ou t) INST (2-8 x P) 4.9 (392 0A) INST (16000A) Fixed (1 6000 A)

2-4-500 KCMIL

CBL-0003


BUS-0001

2-3-500 KCMIL

S

P 225 KVA

PD-0002

BUS-0003

UTIL -0001

2-4-500 KCMIL

CBL-0003




TX Inrush

361 A

14650 A

1140 A1140 A

1520 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

C UTLER-HAMM ER C HND, Op tim 550/750 /1050 C HND Trip 1200 AP lu g 1000 ASett ings Pha se LTPU (0.4 -1 .0 x P) 0 .9 (90 0A) LTD I4t (1-5 Sec.) 1 ST PU (1 .5-8 x LTPU) 5.5 (4950A) ST D (0.1-0.5 Sec.) 0.5(I^2 T Ou t) INST (2-8 x P) 8 (8000A)

300 KVA

PD-0002

CU TLE R-HA MMER CH ND, Op tim 550/750/1050 CH ND Trip 1200 AP lug 1000 ASettings P hase L TPU (0.4-1.0 x P) 1 (1 000A) L TD I4 t (1-5 Sec.) 2.2 STPU (1.5 -8 x LTPU) 4.8 (4800A) STD (0 .1-0.5 Sec.) 0.21(I^2 T Ou t) INST (2 -8 x P) 8 (8 000A) INST (1 600 0A) Fixed (16000 A)

3-3-500 KCMIL

3-4-500 KCMIL

CBL-0003

C UTLER-HAMM ER C HND, Op tim 550/750 /1050 C HND Trip 1200 AP lu g 1000 ASett ings Pha se LTPU (0.4 -1 .0 x P) 0 .9 (90 0A) LTD I4t (1-5 Sec.) 1 ST PU (1 .5-8 x LTPU) 5.5 (4950A) ST D (0.1-0.5 Sec.) 0.5(I^2 T Ou t) INST (2-8 x P) 8 (8000A)

300 KVA

PD-0002

CU TLE R-HA MMER CH ND, Op tim 550/750/1050 CH ND Trip 1200 AP lug 1000 ASettings P hase L TPU (0.4-1.0 x P) 1 (1 000A) L TD I4 t (1-5 Sec.) 2.2 STPU (1.5 -8 x LTPU) 4.8 (4800A) STD (0 .1-0.5 Sec.) 0.21(I^2 T Ou t) INST (2 -8 x P) 8 (8 000A) INST (1 600 0A) Fixed (16000 A)

3-3-500 KCMIL

3-4-500 KCMIL

CBL-0003


BUS-0001

3-3-500 KCMIL

S

P 300 KVA

PD-0002

BUS-0003

UTIL -0001

3-4-500 KCMIL

CBL-0003




1680 A

TX Inrush

601 A

25424 A

2100 A

3040 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

CUTL ER -H AM MER CRD, Optim 750 /105 0 CRD Trip 1600 APlug 1600 ASe ttings Phase LTPU (0 .5-1.0 x P ) 0.95 (1520A) LTD I4t (1-5 Sec.) 1 STPU (1.5-8 x L TPU) 5 (7600A) STD (0.1 -0 .5 Sec.) 0.43(I^2 T Out) INST, 1600A (2-10 x P) 6.4 (10240A) INST (17 500 A) Fixe d (17500A)

4-3-600 KCMIL

500 KVA

PD-0002

CU TLER-HAMMER CR D, Opt im 750/1050 CR D Trip 2000 AP lu g 200 0 ASettings Phase LTPU (0.5-1.0 x P) 0.8 6 (1720A) LTD I4 t (1-5 Se c.) 1 STP U (1.5 -8 x LTPU) 8 (1376 0A) STD (0 .1-0.5 S ec.) 0.1 9(I^2 T Ou t) INST , 1600A (2 -1 0 x P) 6 (12000A) INST (1750 0A ) Fixed (17500A)

5-4-600 KCMIL

CBL-0003

CUTL ER -H AM MER CRD, Optim 750 /105 0 CRD Trip 1600 APlug 1600 ASe ttings Phase LTPU (0 .5-1.0 x P ) 0.95 (1520A) LTD I4t (1-5 Sec.) 1 STPU (1.5-8 x L TPU) 5 (7600A) STD (0.1 -0 .5 Sec.) 0.43(I^2 T Out) INST, 1600A (2-10 x P) 6.4 (10240A) INST (17 500 A) Fixe d (17500A)

4-3-600 KCMIL

500 KVA

PD-0002

CU TLER-HAMMER CR D, Opt im 750/1050 CR D Trip 2000 AP lu g 200 0 ASettings Phase LTPU (0.5-1.0 x P) 0.8 6 (1720A) LTD I4 t (1-5 Se c.) 1 STP U (1.5 -8 x LTPU) 8 (1376 0A) STD (0 .1-0.5 S ec.) 0.1 9(I^2 T Ou t) INST , 1600A (2 -1 0 x P) 6 (12000A) INST (1750 0A ) Fixed (17500A)

5-4-600 KCMIL

CBL-0003


BUS-0001

4-3-600 KCMIL

S

P 500 KVA

PD-0002

BUS-0003

UTIL -0001

5-4-600 KCMIL

CBL-0003




2520 A

TX Inrush

902 A

37618 A

3040 A

3040 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

CU TLER-HAMM ER M agnu m D S, R MS 520 M DS-632 Trip 3000 AP lug 3000 ASettings Pha se LTPU (0.4-1.0 x P) 0 .8 (240 0A ) LTD (2-24 S ec.) 2 STPU (2-10 x LTPU) 2 (4800A) STD (0 .1-0.5 Sec.) 0.4 (I^2 T In ) INST (2-10 x P ) 6 (180 00A)

6-3-600 KCMIL

750 KVA

PD-0002

C UTLER-HAMM ER M agnum DS, RMS 52 0 M DS-C3 2 T rip 30 00 AP lug 3 000 ASet ting s Phase LTPU (0.4 -1 .0 x P) 0.9 (2700A) LTD (2 -2 4 Se c.) 2 STPU (2 -1 0 x LTP U) 2 (54 00A) STD (0.1-0.5 Sec.) 0 .2(I^2 T In) INST (2-10 x P) 6 (18000A)

8-4-500 KCMIL

CBL-0003

CU TLER-HAMM ER M agnu m D S, R MS 520 M DS-632 Trip 3000 AP lug 3000 ASettings Pha se LTPU (0.4-1.0 x P) 0 .8 (240 0A ) LTD (2-24 S ec.) 2 STPU (2-10 x LTPU) 2 (4800A) STD (0 .1-0.5 Sec.) 0.4 (I^2 T In ) INST (2-10 x P ) 6 (180 00A)

6-3-600 KCMIL

750 KVA

PD-0002

C UTLER-HAMM ER M agnum DS, RMS 52 0 M DS-C3 2 T rip 30 00 AP lug 3 000 ASet ting s Phase LTPU (0.4 -1 .0 x P) 0.9 (2700A) LTD (2 -2 4 Se c.) 2 STPU (2 -1 0 x LTP U) 2 (54 00A) STD (0.1-0.5 Sec.) 0 .2(I^2 T In) INST (2-10 x P) 6 (18000A)

8-4-500 KCMIL

CBL-0003


BUS-0001

6-3-600 KCMIL

S

P 750 KVA

PD-0002

BUS-0003

UTIL -0001

8-4-500 KCMIL

CBL-0003




6720 A

3040 A

TX Inrush

1203 A

4200 A

44021 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

CBL-0001

PD-0001

CU TLER-HAMM ER M agnum DS, R MS 520 M DS-632 Trip 30 00 AP lug 30 00 ASetting s Phase LTPU (0.4-1.0 x P) 1 (3 000A) LTD (2-24 Sec.) 2 STPU (2 -10 x LTPU) 2 (60 00A ) STD (0.1-0.5 Sec.) 0.3 (I ^2 T In) INST (2-10 x P) M1(10 ) (3 0000A)

8-3-500 KCMIL

1000 KVA

10-4-600 KCMIL

PD-0002

C UTLER-HAMM ER M agn um DS, RMS 520 M DS-84 0 T rip 4000 AP lu g 4000 ASet tings Ph ase LTPU (0.4 -1 .0 x P) 0.9 (36 00A) LTD (2 -24 Sec.) 2 S TPU (2 -12 x LTPU) 2 (7200A) S TD (0.1-0.5 Sec.) 0 .3(I^2 T In) INS T (2-12 x P) 6 (24 000 A)

CBL-0001

PD-0001

CU TLER-HAMM ER M agnum DS, R MS 520 M DS-632 Trip 30 00 AP lug 30 00 ASetting s Phase LTPU (0.4-1.0 x P) 1 (3 000A) LTD (2-24 Sec.) 2 STPU (2 -10 x LTPU) 2 (60 00A ) STD (0.1-0.5 Sec.) 0.3 (I ^2 T In) INST (2-10 x P) M1(10 ) (3 0000A)

8-3-500 KCMIL

1000 KVA

10-4-600 KCMIL

PD-0002

C UTLER-HAMM ER M agn um DS, RMS 520 M DS-84 0 T rip 4000 AP lu g 4000 ASet tings Ph ase LTPU (0.4 -1 .0 x P) 0.9 (36 00A) LTD (2 -24 Sec.) 2 S TPU (2 -12 x LTPU) 2 (7200A) S TD (0.1-0.5 Sec.) 0 .3(I^2 T In) INS T (2-12 x P) 6 (24 000 A)

TCC Name: 1000 KVA Current Scale x 10 Reference Voltage: 480 Oneline: SKM Systems Analysis, Inc. April 17, 2008 6:00 PM Consultant: M/E Engineering, P.C.Project: 1000 kVA Transformer Protection Engineer: William T. Gonsa, P.E.

UTIL-0001

CBL-0001

BUS-0002

PD -0001

8-3 -500 KC MIL

S

P 1000 KV A

10-4-600 KCM IL

PD -0002

BUS-0005




6720 A

5040 A

TX Inrush

1804 A

5040 A

64090 A

0.5 1

1

10

10

100

100

1K

1K

10K

10K

0 .01 0.01

0.10 0.10

1 1

10 10

100 100

1000 1000


TIM

E IN

SECONDS

CBL-0001

PD-0001

CU TLE R-HA MM ER M agnu m D S, R MS 520 M DS -85 0 Trip 50 00 AP lu g 50 00 AS etting s P ha se LTPU (0.4-1.0 x P) 0 .9 (450 0A ) LTD (2-24 S ec.) 7 STP U (2-12 x LTP U) 2 (90 00A ) STD (0.1-0.5 Se c.) 0.5 (I ^2 T In ) INS T (2-12 x P ) 10 (50 000 A)

12-3-600 KCMIL

1500 KVA

12-4-600 KCMIL

PD-0002

CUT LE R-H AM ME R Ma gnu m DS, RM S 520 MD S-C50 Trip 500 0 AP lug 500 0 AS ettings P hase L TPU (0 .4-1.0 x P) 1 (50 00A ) L TD (2-24 S ec.) 7 S TP U (2-12 x L TPU) 2 (1 0000 A ) S TD (0.1-0.5 Sec.) 0.1(I^2 T In) IN ST (2 -1 2 x P) 8 (4 000 0A )

CBL-0001

PD-0001

CU TLE R-HA MM ER M agnu m D S, R MS 520 M DS -85 0 Trip 50 00 AP lu g 50 00 AS etting s P ha se LTPU (0.4-1.0 x P) 0 .9 (450 0A ) LTD (2-24 S ec.) 7 STP U (2-12 x LTP U) 2 (90 00A ) STD (0.1-0.5 Se c.) 0.5 (I ^2 T In ) INS T (2-12 x P ) 10 (50 000 A)

12-3-600 KCMIL

1500 KVA

12-4-600 KCMIL

PD-0002

CUT LE R-H AM ME R Ma gnu m DS, RM S 520 MD S-C50 Trip 500 0 AP lug 500 0 AS ettings P hase L TPU (0 .4-1.0 x P) 1 (50 00A ) L TD (2-24 S ec.) 7 S TP U (2-12 x L TPU) 2 (1 0000 A ) S TD (0.1-0.5 Sec.) 0.1(I^2 T In) IN ST (2 -1 2 x P) 8 (4 000 0A )

TCC Name: 1500 KVA Current Scale x 10 Reference Voltage: 480 Oneline: SKM Systems Analysis, Inc. April 17, 2008 5:57 PM Consultant: M/E Engineering, P.C.Project: 1500 kVA Transformer Protection Engineer: William T. Gonsa, P.E.

UTIL -0001

CBL-0001

BU S-0002

PD -0001

12-3-600 KCM IL

S

P 1500 KV A

12-4-600 KCM IL

PD -0002

BU S-0005


ELECTRICAL GENERAL DESIGN PROCEDURES


G. THE FOLLOWING PAGES INCLUDE PANELBOARD SCHEDULES. THE FIRST TWO CAN BE

FOUND ON THE INTRANET BY USING THE FOLLOWING LINKS, Panelboard Sizing, Switchboard

Sizing. THESE SCHEDULES WILL SIZE THE PANELBOARD/SWITCHBOARD AND CAN BE INSERTED

ON YOUR DRAWINGS.

THE NEXT TWO SCHEDULES ARE FOR HAND WRITTEN DESIGNER NOTES. THE LAST SCHEDULE

IS ONE THAT CAN ALSO BE FOUND ON THE INTRANET AND CAN BE USED ON THE DRAWINGS.

PREFERABLY THE “SIZING” SCHEDULES SHOULD BE USED.




H. DRY TYPE TRANSFORMER SCHEDULE




I. LIGHTING CALCULATIONS USE THE FOLLOWING LINK, \\me-buff-001\ME-

Office\Templates\Electrical\E-Excel\LTG-02.XLS OR HAND CALCULATE USING THE FOLLOWING

PAGE.




J. THE FOLLOWING PERTAINS TO MOTOR CONTROL CENTER DESIGN. ALLEN BRADLEY HAS

SOME GOOD SOFTWARE THAT CAN BE DOWNLOADED FROM THEIR WEBSITE THAT WORKS

REAL WELL. THE FOLLOWING IS THE LINK FOR ALLEN BRADLEY, http://www.ab.com/software/pcp/.




K. THE FOLLOWING ARE ELECTRIC EQUIPMENT AND CONTROL SCHEDULES WITH EXAMPLES.

THE SCHEDULES ARE ON THE INTRANET AT THE FOLLOWING LINK, Electric Equipment and Control

Schedules. USE THE SCHEDULES ON YOUR PROJECTS. IF YOU HAVE A HORSEPOWER, THE

SCHEDULE WILL CALCULATE SHORT CIRCUIT PROTECTION, CONDUCTOR AND CONDUIT SIZES

FOR YOU BY NEC STANDARDS.

THE FOLLOWING ALSO INCLUDES AN EXAMPLE OF A SCHEDULE FOR YOUR USE.




TELEPHONE MEMO FORM.




M. CONVERSION FACTORS

ELECTRICAL GROUP GENERAL DESIGN PROCEDURES

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