National Fire Protection Association...The use of insulation that is white or gray or that has three...

National Fire Protection Association 1 Batterymarch Park, Quincy, MA 02169-7471 Phone: 617-770-3000 • Fax: 617-770-0700 • www.nfpa.org

NEC Code-Making Panel 11

Second Draft Meeting Agenda

November 5-7, 2015

San Diego, CA

Item No. Subject 15-11 -1 Call to Order 15-11-2 Introduction of Members and Guests 15-11-3 Approval of A2016 First Draft Meeting Minutes 15-11-4 Review of Meeting Procedures and Revision Schedule 15-11-5 Task Group Reports 15-11-6 Process Public Comments and Develop Second Revisions 15-11-7 Fire Protection Research Foundation Requests 15-11-8 Old Business 15-11-9 New Business 15-11-10 Adjournment

Public Comment No. 1063 Global Input submitted

Public Comment No. 1800 Section No. 409.22 submitted

Public Comment No. 1033 Section No. 409.23 Chad Kennedy

Public Comment No. 409 Section No. 409.23 CHARLES POWELL

Public Comment No. 630 Section No. 409.23 JOHN MASARICK


Public Comment No. 833 Section No. 409.110 VINCE BACLAWSKI

Public Comment No. 323 Section No. 430.1 TIMOTHY CROUSHORE

Public Comment No. 834 Section No. 430.22(G) VINCE BACLAWSKI

Public Comment No. 413 Section No. 430.28, Exception #2 (newGERALD DALEY


Public Comment No. 410 Section No. 430.99 CHARLES POWELL

Public Comment No. 631 Section No. 430.99 JOHN MASARICK

Public Comment No. 668 Section No. 430.109(F) AMY CRONIN


Public Comment No. 835 Section No. 440.9 VINCE BACLAWSKI


Public Comment No. 754 Section No. 440.10(B) JOHN MASARICK

Public Comment No. 1073 Section No. 440.22(A) Ron Chilton

Public Comment No. 1807 Section No. 440.22(B) submitted

Public Comment No. 1087 Section No. 440.22(B) [Excluding any SuRon Chilton

Public Comment No. 309 Annex D, Example D8 JOHN MCCAMISH

Public Comment No. 562 Annex D, Example D8 Rodney Jones

Public Comment No. 1063-NFPA 70-2015 [ Global Input ]

Article 100 Definitions

Voltage, Nominal…..Informational Note No. 3: Certain 48-volt DC battery units have a charging float voltage up to 58 volts. In DCapplications 60 volts is used to cover the entire range of float voltages.

Article 110

110.27 Guarding of Live Part(A) Live Parts Guarded Against Accidental Contact. Except as elsewhere required or permitted by this Code, live parts ofelectrical equipment operating at 50 volts AC/60 volts DC or more shall be guarded against accidental contact by approvedenclosures or by any of the following means:

Article 200 Use and Identification of Grounded Conductors

200.7

(B) Circuits of Less Than 50 Volts AC. A conductor with white or gray color insulation or three continuous white stripes orhaving a marking of white or gray at the termination for circuits of less than 50 volts AC shall be required to be grounded only asrequired by 250.20(A).C) Circuits of 50 Volts AC or More. The use of insulation that is white or gray or that has three continuous white or gray stripesfor other than a grounded conductor for circuits of 50 volts AC or more shall be permitted only as in (1) and (2).

Article 215 Feeders

215.12(C)(2) Feeders Supplied from Direct-Current Systems.Where a feeder is supplied from a dc system operating at more than 50 60 volts, each ungrounded conductor of 4 AWG orlarger shall be identi?ed by polarity at all termination, connection, and splice points by marking tape, tagging, or otherapproved means; each ungrounded conductor of 6 AWG or smaller shall be identi?ed by polarity at all termination,connection, and splice points in compliance with 215.12(C)(2)(a) and (b). The identi?cation methods utilized forconductors originating within each feeder panelboard or similar feeder distribution equipment shall be documented ina manner that is readily available or shall be permanently posted at each feeder panelboard or similar feederdistribution equipment.Article 430 Motors, Motor Circuits, and Controllers

430.232 Where Required. Exposed live parts of motors and controllers operating at 50 volts DC or more between terminalsshall be guarded against accidental contact by enclosure or by location as follows:

430.233 Guards for Attendants. Where live parts of motors or controllers operating at over 50 volts AC to ground are guardedagainst accidental contact only by location as specified in 430.232, and where adjustment or other attendance may benecessary during the operation of the apparatus, suitable insulating mats or platforms shall be provided so that the attendantcannot readily touch live parts unless standing on the mats or platforms.

Article 445 Generators

445.14 Protection of Live Parts. Live parts of generators operated at more than 50 volts AC/60 volts DC to ground shall notbe exposed to accidental contact where accessible to unquali?ed persons.

Article 460 Capacitors

460.6 (A) Time of Discharge. The residual voltage of a capacitor shall be reduced to 50 volts DC , nominal, or less within 1minute after the capacitor is disconnected from the source of supply.

460.28(A) Means for Discharge. A means shall be provided to reduce the residual voltage of a capacitor to 50 volts DC or lesswithin 5 minutes after the capacitor is disconnected from the source of supply.Article 480 Storage Batteries

480.5 Overcurrent Protection for Prime Movers. Overcurrent protection shall not be required for conductors from a batterywith a nominal voltage of 60 volts DC or less if the battery provides power for starting, ignition, or control of primemovers. Section 300.3 shall not apply to these conductors.

480.6 DC Disconnect Methods. (A) Disconnecting Means. A disconnecting means shall be provided for all ungroundedconductors derived from a stationary battery system with a nominal voltage over 60 volts DC. A disconnecting meansshall be readily accessible and located within sight of the battery system.

Article 522 Control Systems for Permanent Amusement Attractions

522.25 Ungrounded Control Circuits. Separately derived ac and 2-wire dc circuits and systems 50 volts AC/60 volts DC orgreater shall be permitted to be ungrounded, provided that all the following conditions are met:

Article 625

625.18 Interlock. Electric vehicle supply equipment shall be provided with an interlock that de-energizes the electricvehicle connector whenever the electrical connector is uncoupled from the electric vehicle. An interlock shall not berequired for portable cord-and-plug-connected electric vehicle supply equipment intended for connection to

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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receptacle outlets rated at 125 volts, single phase, 15 and 20 amperes. An interlock shall not be required for dcsupplies less than 50 60 volts dc.

625.19 Automatic De-Energization of Cable. The electric vehicle supply equipment or the cable-connectorcombination of the equipment shall be provided with an automatic means to de-energize the cable conductors andelectric vehicle connector upon exposure to strain that could result in either cable rupture or separation of the cablefrom the electric connector and exposure of live parts. Automatic means to de-energize the cable conductors andelectric vehicle connector shall not be required for portable cord-and-plug-connected electric vehicle supplyequipment intended for connection to receptacle outlets rated at 125 volts, single phase, 15 and 20 amperes. Aninterlock shall not be required for dc supplies less than 50 60 volts dc.

625.44 Electric Vehicle Supply Equipment Connection.

Electric vehicle supply equipment shall be permitted to be cord and plug-connected to the premises wiring system inaccordance with one of the following:

(A) Connections to 125-Volt, Single-Phase, 15 and 20-Ampere Receptacle Outlets. Electric vehicle supply equipment intendedfor connection to non-locking, 2-pole,3-wire grounding-type receptacle outlets rated at 125 V, single phase, 15 and 20 amperesor from a supply of less than 50 60 volts dc.

(4) Supply Circuits. The supply circuit to the mechanical ventilation equipment shall be electrically interlocked withthe electric vehicle supply equipment and shall remain energized during the entire electric vehicle charging cycle.Electric vehicle supply equipment shall be marked in accordance with625.15. Electric vehicle supply equipmentreceptacles rated at 125 volts, single phase, 15 and 20 amperes shall be marked in accordance with 625.15 andshall be switched, and the mechanical ventilation system shall be electrically interlocked through the switch supplypower to the receptacle. Electric vehicle supply equipment supplied from less than 50 60 volts dc shall be marked inaccordance with 625.15(C) and shall be switched, and the mechanical ventilation system shall be electricallyinterlocked through the switch supply power to the electric vehicle supply equipment.

Article 669 Electroplating

669.6 Wiring Methods. Conductors connecting the electrolyte tank equipment to the conversion equipment shall bein accordance with 669.6(A) and (B).

(A) Systems Not Exceeding 50 60 Volts Direct Current. Insulated conductors shall be permitted to be run without insulatedsupport, provided they are protected from physical damage. Bare copper or aluminum conductors shall be permitted wheresupported on insulators.

(B) Systems Exceeding 50 60 Volts Direct Current. Insulated conductors shall be permitted to be run on insulatedsupports, provided they are protected from physical damage. Bare copper or aluminum conductors shall be permittedwhere supported on insulators and guarded against accidental contact up to the point of termination in accordancewith 110.27.

A rticle 720 Circuits and Equipment Operating at Less than 50 Volts

Circuits and Equipment Operating at Less Than 50 Volts AC/60 Volts DC.

720.1 Scope. This article covers installations operating at less than 50 volts, alternating current, or 60 volts direct current oralternating current .

720.11 Mechanical Execution of Work. Circuits operating at less than 50 volts AC or 60 volts DC shall be installedin a neat and workmanlike manner. Cables shall be supported by the building structure in such a manner that thecable will not be damaged by normal building use.Type your content here ...

Statement of Problem and Substantiation for Public Comment

Over the past decade numerous code articles have been placed into the NEC as a result of the increased resurgence of DC systems. These systems, similar to their AC counterpart, have mandated code requirements that must be met when the system voltage exceeds a certain threshold. For years the system threshold for many of the requirements has been kept at the 50 volt level. While this is appropriate for AC systems, it can create confusion to the user of the document when applied to a 48 DC batteries during charging where a “float voltage” is common at 58 volts. The float voltage can vary significantly depending on battery chemistry, battery construction, and the actual ambient temperature. This voltage may be constant for the entire duration of the charge or can fluctuate. Some 48 volt DC systems stay above the 50 volt threshold for 99% of the time for applications such as telecommunications, UPS systems and emergency lighting.

This elevated voltage may create confusion since various AHJ’s might see 58 volts and mandate that a code rule must be followed since the 50 volt threshold has been increased. To resolve these issues a DC task group was formed to research the DC systems found in the NEC and to correlate the various DC topics that were being added to the NEC. The task group recommended the use of 60 volt DC throughout the code to eliminate the confusion that could arise from the elevated float voltage. The intent of the task group was to provide a consistent use of the voltage threshold within the NEC document.

For the 2017 NEC Revision Cycle, a task group was formed to correlate the use of the 50/60V threshold and provide public comments for the second draft. The task group members Larry Ayer (Chair), Bill Cantor, Donny Cook, Jim Dollard (Co-Chair), John Kovacik (DC Task Group Chair), Ernie Gallo, Vince Saporita, and Jim White provided input and guidance for these recommendations.

To correlate the use of 50 volts for AC systems and 60 volts for DC systems, the recommended NEC changes are based on the following:


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1. Where a code section refers to AC systems only and indicates 50 volts the acronym “AC” was added to provide clarity. 2. Where a code section refers to a requirement used only in a DC system at a 50 volt threshold, the voltage is revised to 60 volts and the term “DC” is added3. Where a code section indicates a 50 volt threshold, and the section is a requirement for both AC and DC systems, the text is revised as “50 volts AC/60 volts DC”.4. When a code section refers to DC systems, and the term “nominal” is used, it will be deleted since the voltage threshold is increased to 60 volts.5. A fine print note is being recommended in Article 100 below the definition for “Nominal Voltage” to provide additional information on float voltage.

NEC changes are being recommended for the following code sections:

1. *Add informational note after “Voltage, Nominal”. Informational note to read as follows:*

*Informational Note No. 3: Certain 48-volt DC battery units use a charging float voltage up to 58 volts. In DC applications 60 volts is used to cover the entire range of float voltages.*

2. For section 110.27, “50 volts” is being changed to “50 volts AC/60 volts DC”. This will clarify the voltage threshold for AC and DC systems.

3. Section 200.7 (B) and (C) applies to conductor marking for AC systems only. “AC” is added after 50 volts to clarify that this requirement is only for AC systems.

4. Section 210.5(C)(2) was revised in the First draft that changed “50 volts” to “60 volts” to correlate with the new microgrid article. Revise section 215.12(C) from“50 volts” to “60 volts” to correlate with section 210.5(C)(2).

5. In section 445.14, revise “50 volts” to 50 volts AC/60 volts DC” to clarify that this requirement pertains to both AC and DC systems.

6. In sections 480.5 and 480.6 “50 volts” was changed to “60 volts” since these pertain to DC batteries and DC systems.

7. In section 522.25, “50 volts” is being changed to “50 volts AC / 60 volts DC” to clarify that this section pertains to both AC and DC systems and distinguishes between the two voltage systems and thresholds.

8. Article 625, Electrical Vehicle Charging System. Revise the text from “50 volts” to“60 volts” since these are DC systems.

9. Section 669.6(A) and (B) are DC systems. Revise the text from“50 volts” to “60 volts”

10. Section 690.71 (B) is a DC system with a threshold of 50 volts. Revise the text from “50 volts” to “60 volts DC”.

11. Article 720 Circuits and Equipment Operating at Less Than 50 Volts covers both AC and DC systems. To correlate the Title has been changed to “50 Volts AC/60 Volts DC”. The Scope 720.1 and section 720.11 have been modified to clarify that this Article applies to both systems with the corresponding voltage.

Related Item

Public Input No. 3681-NFPA 70-2014 [Global Input]

Submitter Information Verification

Submitter Full Name: Lawrence Ayer

Organization: Biz Com Electric, Inc.

Affilliation: IEC

Street Address:

City:

State:

Zip:

Submittal Date: Wed Sep 23 14:39:50 EDT 2015


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Public Comment No. 1800-NFPA 70-2015 [ Section No. 409.22 ]

409.22 Short-Circuit Current Rating.

An industrial control panel shall not be installed where the available fault current exceeds its short-circuit current rating asmarked in accordance with 409.110(4).


The Correlating Committee directs that this First Revision be reviewed by the panel with regard to similar text in 409.22. The panel shall consider reviewing the proper use of the terms “fault current” and “short circuit current”.

Related Item

First Revision No. 3002-NFPA 70-2015 [New Section after 409.22]


Submitter Full Name: CC on NEC-AAC

Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Tue Sep 29 08:49:03 EDT 2015


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409.23 Available Fault Current.

When an industrial control panel is required to be marked with a short circuit current rating in accordance with 409.110(4) , theavailable short circuit current at the industrial control panel and the date the short circuit current calculation was performed shallbe documented and made available to those authorized to inspect the installation.


While it is certainly important for industrial control panels to have an adequate short circuit current rating, this may be said for ALL electrical equipment. This is clearly covered in Sections 110.9 and 110.10. This requirement should be in Article 110 and not proliferated throughout the Code as it is a fundamental requirement that applies to all equipment.

Related Item



Submitter Full Name: Chad Kennedy

Organization: Schneider Electric

Street Address:

City:

State:

Zip:



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When an industrial control panel is required to be marked with a short circuit current rating in accordance with 409.110(4), theavailable short circuit fault current at the industrial control panel and the date the short circuit fault current calculation wasperformed shall be documented and made available to those authorized to inspect the installation.


The wording change is suggested for consistency with code language in sections 110.9, 440.10, etc and with this section's own title.

Related Item

Public Input No. 4421-NFPA 70-2014 [New Section after 409.22]



Submitter Full Name: CHARLES POWELL

Organization: EASTMAN CHEMICAL COMPANY

Affilliation: American Chemistry Council

Street Address:

City:

State:

Zip:

Submittal Date: Fri Aug 14 08:04:22 EDT 2015


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When an industrial control panel is required to be marked with a short circuit current rating in accordance with 409.110(4) , theavailable short circuit current at the industrial control panel and the date the short circuit current calculation was performed shallbe documented and made available to those authorized to inspect the installation.


IEC's position is to delete 409.23 - (FR 3002)

The code already requires that equipment be installed according to available fault current, so adding this requirement is redundant. The installer/supplier already has the responsibility/liability to install the proper equipment based on the characteristics of the system.This proposal puts too much liability on the contractor/supplier because after installation various factors can change which will affect the available fault current. Feeders can be reworked, transformers can be changed with different impedance values, motor loads can be added to the existing system and similar factors that can change the available fault current. In the case of a lawsuit, the installer will have the burden of proof that the installation was done according to code and would result in unnecessary costs for defending an installation that was installed correctly, but that had variables change that are out of their control. A better proposal would be to require the owner to relabel the equipment after any alteration to the system.

Related Public Comments for This Document

Related Comment Relationship

Public Comment No. 631-NFPA 70-2015 [Section No. 430.99]

Public Comment No. 748-NFPA 70-2015 [Section No. 620.51(D)(2)]

Public Comment No. 749-NFPA 70-2015 [Section No. 700.5(E)]

Public Comment No. 750-NFPA 70-2015 [Section No. 701.5(D)]



Public Comment No. 755-NFPA 70-2015 [Section No. 670.5(2)]

Public Comment No. 754-NFPA 70-2015 [Section No. 440.10(B)]

Related Item



Submitter Full Name: JOHN MASARICK

Organization: Independent Electrical Contractors, Inc.

Affilliation: Independent Electrical Contractors, Inc.

Street Address:

City:

State:

Zip:

Submittal Date: Sat Sep 12 19:06:41 EDT 2015


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409.110 Marking.

An industrial control panel shall be marked with the following information that is plainly visible after installation:

(1) Manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product canbe identified.

(2) Supply voltage, number of phases, frequency, and full-load current for each incoming supply circuit.

(3) Industrial control panels supplied by more than one electrical source such that more than one disconnecting means isrequired to disconnect all circuits within the control panel shall be marked to indicate that more than one disconnectingmeans is required to de-energize the equipment. The location of the means necessary to disconnect all circuits 50-voltsand over shall be documented and available.

(4) Short-circuit current rating of the industrial control panel based on one of the following:

a. Short-circuit current rating of a listed and labeled assembly

b. Short-circuit current rating established utilizing an approved method

Informational Note: ANSI/UL 508A, Standard for Industrial Control Panels, Supplement SB, is an example of anapproved method.

Exception to (4): Short-circuit current rating markings are not required for industrial control panels containing onlycontrol circuit components.

(5) If the industrial control panel is intended as service equipment, it shall be marked to identify it as being suitable for use asservice equipment.

(6) Electrical wiring diagram or the identification number of a separate electrical wiring diagram or a designation referenced ina separate wiring diagram.

(7) An enclosure type number shall be marked on the industrial control panel enclosure.


The Correlating Committee directs that the phrase “50-volts and over” be changed to “50 volts or more” to correlate with other parts of the Code.

Related Item

First Revision No. 3001-NFPA 70-2015 [Section No. 409.110]



Organization: NFPA

Street Address:

City:

State:

Zip:



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409.110 Marking.

An industrial control panel shall be marked with the following information that is plainly visible after installation:

(1) Manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product canbe identified.

(2) Supply voltage, number of phases, frequency, and full-load current for each incoming supply circuit.

(3) Industrial control panels supplied by more than one electrical source such that source where more than onedisconnecting means is required to disconnect all circuits 50-volts and over within the control panel shall be marked toindicate that more than one disconnecting means is required to de-energize the equipment. The location of the meansnecessary to disconnect all circuits 50-volts and over shall be documented and available.

(4) Short-circuit current rating of the industrial control panel based on one of the following:

(5) Short-circuit current rating of a listed and labeled assembly

(6) Short-circuit current rating established utilizing an approved method

Informational Note: ANSI/UL 508A, Standard for Industrial Control Panels , Supplement SB, is an example of anapproved method.

Exception to (4): Short-circuit current rating markings are not required for industrial control panels containing onlycontrol circuit components.

(7) If the industrial control panel is intended as service equipment, it shall be marked to identify it as being suitable for use asservice equipment.

(8) Electrical wiring diagram or the identification number of a separate electrical wiring diagram or a designation referenced ina separate wiring diagram.

(9) An enclosure type number shall be marked on the industrial control panel enclosure.


No changes item (4)

The revised text clarifies that the marking requirement only applies to circuits 50-volts and over.

Related Item



Submitter Full Name: VINCE BACLAWSKI

Organization: NEMA

Street Address:

City:

State:

Zip:

Submittal Date: Mon Sep 21 10:52:59 EDT 2015


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430.1 Scope.

This article covers motors, motor branch-circuit and feeder conductors and their protection, motor overload protection, motorcontrol circuits, motor controllers, and motor motor control centers and adjustable-speed drive systems .

Figure 430.1 Article 430 Contents.

Informational Note No. 1: Installation requirements for motor control centers are covered in 110.26(E). Air-conditioningand refrigerating equipment are covered in Article 440.

Informational Note No. 2: Figure 430.1 is for information only.


Adding adjustable-speed drive systems to the scope of Article 430. Adjustable-speed drive systems are unique to the list of other items contained in the Scope of Article 430.

Related Item

Public Input No. 1818-NFPA 70-2014 [Section No. 430.1]


Submitter Full Name: TIMOTHY CROUSHORE

Organization: FIRSTENERGY

Affilliation: FirstEnergy

Street Address:

City:


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Public Comment No. 834-NFPA 70-2015 [ Section No. 430.22(G) ]

(G) Conductors for Small Motors.

Conductors for small motors shall not be smaller than 14 AWG unless otherwise permitted in 430.22(G)(1) or (G)(2).

(1) 18 AWG Copper.

Where 18 AWG individual copper conductors installed in a cabinet or enclosure, 18 AWG individual copper conductors ,copper conductors that are part of a jacketed multiconductor cable assembly, or copper conductors in a flexible cord shall bepermitted, under either of the following sets of conditions:

(1) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1) , of greater than 3.5 amperes, andless than or equal to 5 amperes, and all the following conditions are met:

(2) The circuit is protected in accordance with 430.52 .

(3) The circuit is provided with maximum Class 10 or Class 10A overload protection in accordance with 430.32 .

(4) Overcurrent protection is provided in accordance with 240.4(D)(1)(2) .

(5) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1) , of 3.5 amperes or less, and allthe following conditions are met:


(7) The circuit is provided with maximum Class 20 overload protection in accordance with 430.32 2.


(2) 16 AWG Copper.

Where 16 AWG individual copper conductors installed in a cabinet or enclosure, 16 AWG individual copper conductors ,copper conductors that are part of a jacketed multiconductor cable assembly, or copper conductors in a flexible cord shall bepermitted under either of the following sets of conditions:

(1) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1) , of greater than 5.5 amperes, andless than or equal to 8 amperes, and all the following conditions are met:


(3) The circuit is provided with maximum Class 10 or Class 10A overload protection in accordance with 430.32 .


(5) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1) , of 5.5 amperes or less, and allthe following conditions are met:


(7) The circuit is provided with maximum Class 20 overload protection in accordance with 430.32 .


Additional Proposed Changes

File Name Description Approved

430.22_G_FR1357-1is.pdf 430.22(G) document


No change to the other items of the sublisting.

The proposed text is identical to Public Input No. 1357 which should have been accepted as a First Revision to allow multiconductor cables and cords to leave the enclosure. The installation concerns expressed in the Code panel comment regarding potential damage to multiconductor cables and cords leaving the enclosure are adequately addressed in the construction specifications, wiring methods, and restrictions in Chapters 3 and 4.

Related Item

Public Input No. 1357-NFPA 70-2014 [Section No. 430.22(G)]


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NFPA Public Comment Form (For Proposing Revisions to the First Draft)

NOTE: All Public Comments must be received by 5:00 pm EST/EDST on the published Public Comment Paper Submission Closing Date.

For further information on the standards-making process, please contact the Codes and Standards Administration at 617-984-7246 or visit www.nfpa.org/codes.

For technical assistance, please call NFPA at 1-800-344-3555

FOR OFFICE USE ONLY

Log #: CMP 11

Date Rec’d:

Date Name Vince Baclawski Tel. No. 703-841-3236

Company National Electrical Manufacturers Association (NEMA) Email [email protected]

Street Address 1300 North 17th

Street, Suite 900 City Rosslyn State VA Zip 22209

Please indicate organization represented (if any) NEMA

1. (a) NFPA Document Title National Electrical Code NFPA No. Year 2017

(b) Section/Paragraph Section No. 430.22(G)

2. Identify First Revision and/or Input to which Comment relates: No(s).

Public Input 1357-NFPA 70-2015 [ Section No. 430.22(G) ]

2. Public Comment Recommends (check one): new text revised text deleted text

3. Proposed Text of Public Comment (include proposed new or revised wording, or identification of wording to be deleted):

[Note: Proposed text should be in legislative format showing proposed changes to the First Draft; i.e., use underscore to denote wording to be inserted (inserted wording) and strike-through to denote wording to be deleted (deleted wording).]

(G) Conductors for Small Motors. Conductors for small motors shall not be smaller than 14 AWG unless otherwise permitted in 430.22(G)(1) or (G)(2).

(1) 18 AWG Copper. Where installed in a cabinet or enclosure, 18 AWG individual copper conductors installed in a cabinet or enclosure, copper conductors that are part of a jacketed multiconductor cable assembly, or copper conductors in a flexible cord shall be permitted, under either of the following sets of conditions:

(1) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of greater than 3.5 amperes, and less than or equal to 5 amperes, and all the following conditions are met:

a. The circuit is protected in accordance with 430.52.

b. The circuit is provided with maximum Class 10 or Class 10A overload protection in accordance with 430.32.

c. Overcurrent protection is provided in accordance with 240.4(D)(1)(2).

(2) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of 3.5 amperes or less, and all the following conditions are met:


b. The circuit is provided with maximum Class 20 overload protection in accordance with 430.32.


(2) 16 AWG Copper. Where installed in a cabinet or enclosure,16 AWG individual copper conductors installed in a cabinet or enclosure, copper conductors that are part of a jacketed multiconductor cable assembly, or copper conductors in a flexible cord shall be permitted under either of the following sets of conditions:

(1) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of greater than 5.5 amperes, and less than or equal to 8 amperes, and all the following conditions are met:


b. The circuit is provided with maximum Class 10 or Class 10A overload protection in accordance with 430.32.


(2) The circuit supplies a motor with a full-load current rating, as determined by 430.6(A)(1), of 5.5 amperes or less, and all the following conditions are met:


b. The circuit is provided with maximum Class 20 overload protection in accordance with 430.32.

http://www.nfpa.org/codes


4. Statement of Problem and Substantiation for Public Comment: (Note: State the problem that would be resolved by your

recommendation; give the specific reason for your Public Comment, including copies of tests, research papers, fire experience, etc. If more than 200 words, it may be abstracted for publication.)

The proposed text is identical to Public Input No. 1357 which should have been accepted as a First Revision to allow multiconductor

cables and cords to leave the enclosure. The installation concerns expressed in the Code panel comment regarding potential

damage to multiconductor cables and cords leaving the enclosure are adequately addressed in the construction specifications, wiring

methods, and restrictions in Chapters 3 and 4.

5. Copyright Assignment

(a) I am the author of the text or other material (such as illustrations, graphs) proposed in the Public Comment.

(b) Some or all of the text or other material proposed in this Public Comment was not authored by me. Its source

is as follows: (please identify which material and provide complete information on its source)

I hereby grant and assign to the NFPA all and full rights in copyright in this Public Comment (including both the Proposed Text and the Statement of Problem and Substantiation). I understand that I acquire no rights in any publication of NFPA in which this Public Comment in this or another similar or analogous form is used. Except to the extent that I do not have authority to make an assignment in materials that I have identified in (b) above, I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter into this assignment.

Signature (Required)

PLEASE USE SEPARATE FORM FOR EACH PUBLIC COMMENT

To: Secretary, Standards Council National Fire Protection Association 1 Batterymarch Park ∙ Quincy, MA 02169 OR

Fax to: (617) 770-3500 OR Email to: [email protected] 8/20/2015

mailto:[email protected]

Public Comment No. 413-NFPA 70-2015 [ New Section after 430.28 ]

TITLE OF NEW CONTENT

Type your content here ...Exception #2

Installation may comply with 240.21 (B) (5)


An outdoor feeder tap can be of unlimited length if it comply s with all of the conditions of 240.21(B)(5) unless it is a motor short circuit and ground fault protective device as in 430.28. If the motor short circuit and ground fault protective device was in a panel containing a main it would be OK. It should be Acceptable to supply a Motor circuit with a tap conductor governed by the rules of 240.21(B)(5) when it feeds a motor short circuit and ground fault protective device.

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First Revision No. 3013-NFPA 70-2015 [Section No. 430.22(F)]


Submitter Full Name: GERALD DALEY

Organization: Daley Electric Company

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Submittal Date: Mon Aug 17 17:32:49 EDT 2015


856 of 2079 10/1/2015 11:02 AM



The available short circuit current at the motor control center and the date the short circuit current calculation was performedshall be documented and made available to those authorized to inspect the installation.


While it is certainly important for motor control centers to have an adequate short circuit current rating, this may be said for ALL electrical equipment. This is clearly covered in Sections 110.9 and 110.10. This requirement should be in Article 110 and not proliferated throughout the Code as it is a fundamental requirement that applies to all equipment.

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858 of 2079 10/1/2015 11:02 AM



The available short circuit fault current at the motor control center and the date the short circuit fault current calculation wasperformed shall be documented and made available to those authorized to inspect the installation.


The wording change is suggested for consistency with code language in sections 110.9, 440.10, etc and with this section's own title.

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Public Input No. 4712-NFPA 70-2014 [Section No. 430.98(A)]



Submitter Full Name: CHARLES POWELL

Organization: EASTMAN CHEMICAL COMPANY

Affilliation: American Chemistry Council

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Submittal Date: Fri Aug 14 08:15:36 EDT 2015


859 of 2079 10/1/2015 11:02 AM



The available short circuit current at the motor control center and the date the short circuit current calculation was performedshall be documented and made available to those authorized to inspect the installation.



The code already requires that equipment be installed according to available fault current, so adding this requirement is redundant. The installer/supplier already has the responsibility/liability to install the proper equipment based on the characteristics of the system.This proposal puts too much liability on the contractor/supplier because after installation various factors can change which will affect the available fault current. Feeders can be reworked, transformers can be changed with different impedance values, motor loads can be added to the existing system and similar factors that can change the available fault current. In the case of a lawsuit, the installer will have the burden of proof that the installation was done according to code and would result in unnecessary costs for defending an installation that was installed correctly, but that had variables change that are out of their control. A better proposal would be to require the owner to relabel the equipment after any alteration to the system.








Public Comment No. 754-NFPA 70-2015 [Section No. 440.10(B)]



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Submittal Date: Sat Sep 12 19:27:32 EDT 2015


860 of 2079 10/1/2015 11:02 AM

Public Comment No. 668-NFPA 70-2015 [ Section No. 430.109(F) ]

(F) Cord-and-Plug- or Attachment Fitting- Connected Motors.

For a cord-and-plug-connected motor, an attachment fitting-connected motor, a horsepower-rated attachment plug andreceptacle, flanged surface inlet and cord connector, attachment fitting having ratings no less than the motor or attachment plugand cord connector having ratings no less than the motor ratings shall be permitted to serve as the disconnecting means.Horsepower-rated attachment plugs or attachment fittings , flanged surface inlets, receptacles, or cord connectors shall not berequired for cord-and-plug-connected appliances in accordance with 422.33, room air conditioners in accordance with 440.63,ceiling-suspended (paddle) fans in accordance with 314.27(E) or portable motors rated 1⁄3 hp or less.


New text was proposed and approved for 314.27(E) by CMP 9 in FR 2411 that read as follows:

(E) Separable Attachment Fittings. Outlet boxes shall be permitted to support listed locking support and mounting receptacles used in combination with compatible attachment fittings designed for the support of equipment covered within and subject to all weight and orientation limits contemplated by the listing. Where such fittings are used, the equipment mounted shall comply with 314.27(A) through (D) as applicable. Where the supporting receptacle is installed within a box, it shall be included in the fill calculation covered in 314.16(B)(4).

The text needs to be modified in 430.109(F) to assure that an attachment fitting and receptacle combination that is load-make-and-load-break rated is recognized as a suitable disconnecting means for ceiling-suspended (paddle) fan motors.

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Public Input No. 4449-NFPA 70-2014 [Section No. 430.109(F)]


Submitter Full Name: AMY CRONIN

Organization: STRATEGIC CODE SOLUTIONS LLC

Affilliation: Safety Quick Lighting and Fans Corp.

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861 of 2079 10/1/2015 11:02 AM


440.8 Single Machine.

An air-conditioning or refrigerating system shall be considered to be a single machine under the provisions of 430.87,Exception No. 1, and 430.112, Exception. The motors shall be permitted to be located remotely from each other.


The Correlating Committee directs that this First Revision be reviewed by the panel with regard to 440.10(B). The panel shall consider reviewing the proper use of the terms “fault current” and “short circuit current”. This

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862 of 2079 10/1/2015 11:02 AM


440.9 Grounding and Bonding.

Where multimotor and combination-load equipment is installed outdoors on a roof, an equipment grounding conductor of thewire type shall be installed in outdoor portions of metallic raceway systems that use non-threaded fittings.


We agree with the negative comments submitted by the UL representative that “all UL certified metallic conduit, including EMT, is evaluated for its ability to bond the conduit to the connecting fittings” and that the requirement for additional grounding and bonding is a belts and suspenders approach that will not solve the issue of poor workmanship or ineffective maintenance practices. The Panel Statement that the use of non-threaded conduit systems on rooftops supplying HVACR equipment are subject to movement and damage “that results in separation of non-threaded conduit or tubing resulting in loss of equipment grounding unless a wire type equipment ground is provided” is far-reaching and inaccurate. Not all installations are subjected to the same conditions. A properly installed, code-compliant and properly maintained system will take into account code requirements for protection against physical damage, use of expansion fittings, good workmanship, etc The installation of a supplemental grounding conductor is not a panacea for not following current code requirements.

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Submitter Full Name: VINCE BACLAWSKI

Organization: NEMA

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Submittal Date: Mon Sep 21 11:37:08 EDT 2015


863 of 2079 10/1/2015 11:02 AM


440.10 Short-Circuit Current Rating.

(A) Installation.

Motor controllers of multimotor and combination-load equipment shall not be installed where the available fault current exceedsits short-circuit current rating as marked in accordance with 440.4(B) .

(B) Documentation.

When motor controllers or industrial control panels of multimotor and combination load equipment are required to be markedwith a short circuit current rating, the available short circuit current and the date the short circuit current calculation wasperformed shall be documented and made available to those authorized to inspect the installation.


While it is certainly important for air conditioning and refrigerating equipment to have an adequate short circuit current rating, this may be said for ALL electrical equipment. This is clearly stated in Section 110.10. If this new section is added to the Code, it is likely that similar sections will be proposed to be added to numerous other articles. This requirement should be in Article 110 and not proliferated throughout the Code as it is a fundamental requirement that applies to all equipment. If AHJs are having difficulty determining whether or not HVAC equipment is properly rated, then they must be having the same difficulty for other equipment as well. That is the type of situation Article 110 is intended to address. The correlating committee may wish to review this language for consistency with other electrical equipment articles throughout the NEC.

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864 of 2079 10/1/2015 11:02 AM

Public Comment No. 754-NFPA 70-2015 [ Section No. 440.10(B) ]

(B) Documentation.

When motor controllers or industrial control panels of multimotor and combination load equipment are required to be markedwith a short circuit current rating, the available short circuit current and the date the short circuit current calculation wasperformed shall be documented and made available to those authorized to inspect the installation.



The code already requires that equipment be installed according to available fault current, so adding this requirement is redundant. The installer/supplier already has the responsibility/liability to install the proper equipment based on the characteristics of the system. This proposal puts too much liability on the contractor/supplier because after installation various factors can change which will affect the available fault current. Feeders can be reworked, transformers can be changed with different impedance values, motor loads can be added to the existing system and similar factors that can change the available fault current. In the case of a lawsuit, the installer will have the burden of proof that the installation was done according to code and would result in unnecessary costs for defending an installation that was installed correctly, but that had variables change that are out of their control. A better proposal would be to require the owner to relabel the equipment after any alteration to the system.












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Submittal Date: Fri Sep 18 20:48:00 EDT 2015


865 of 2079 10/1/2015 11:02 AM

Public Comment No. 1073-NFPA 70-2015 [ Section No. 440.22(A) ]

(A) Rating or Setting for Individual Motor-Compressor.

The motor-compressor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the startingcurrent of the motor, with a minimum rating of 115% of the full-load current, or in accordance with 440 .12( A)(1).

A protective device having a rating or setting not exceeding 175 percent of the motor-compressor rated-load current or branch-circuit selection current, whichever is greater, shall be permitted, provided that, where the protection specified is not sufficient forthe starting current of the motor, the rating or setting shall be permitted to be increased but shall not exceed 225 percent of themotor rated-load current or branch-circuit selection current, whichever is greater.

Exception: The rating of the branch-circuit short-circuit and ground-fault protective device shall not be required to be less than15 amperes.


It was not the intent of the Public Input submitted to require the rating of the branch-circuit short-circuit and ground fault protective device to be set at the maximum level stated on the Manufacturer's nameplate labels, as was suggested in the Panel's substantiation. Certainly smaller rated devices may start motor-compressors without damage, however, it has become increasingly the habit to install the smallest device possible. This leaves the decision as to what that minimum level permitted to carry the starting load of the equipment should be, after installation, up to the discretion of the Authority Having Jurisdiction. The minimum setting required by 440.12(A)(1) is not 175% as is generally the marked rating on the Manufacturer's nameplate.

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Public Input No. 2724-NFPA 70-2014 [Section No. 440.22(A)]


Submitter Full Name: Ron Chilton

Organization: North Carolina Code Clearing Committee

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866 of 2079 10/1/2015 11:02 AM

Public Comment No. 1087-NFPA 70-2015 [ Section No. 440.22(B) [Excluding any Sub-Sections] ]

The equipment branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the starting current ofthe equipment with a minimum rating of 115% of the full-load current, or in accordance with 440 .12( A )(1). Where thehermetic refrigerant motor-compressor is the only load on the circuit, the protection shall comply with 440.22(A). Where theequipment incorporates more than one hermetic refrigerant motor-compressor or a hermetic refrigerant motor-compressor andother motors or other loads, the equipment short-circuit and ground-fault protection shall comply with 430.53 and 440.22(B)(1)and (B)(2).


It was not the intent of the Public Input submitted to require the rating of the branch-circuit short-circuit and ground fault protective device to be set at the maximum level stated on the Manufacturer's nameplate labels, as was suggested in the Panel's substantiation. Certainly smaller rated devices may start motor-compressors without damage, however, it has become increasingly the habit to install the smallest device possible. This leaves the decision as to what that minimum level permitted to carry the starting load of the equipment should be, after installation, up to the discretion of the Authority Having Jurisdiction. The minimum setting required by 440.12(A)(1) is not 175% as is generally the marked rating on the Manufacturer's nameplate.

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Public Input No. 2725-NFPA 70-2014 [Section No. 440.22(B) [Excluding any Sub-Sections]]


Submitter Full Name: Ron Chilton

Organization: North Carolina Code Clearing Committee

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867 of 2079 10/1/2015 11:02 AM

Public Comment No. 1807-NFPA 70-2015 [ New Section after 430.90 ]

See Correlating Note below.


The Correlating Committee directs that this First Revision be reviewed by the panel with regard to similar text in 409.22. The panel shall consider reviewing the proper use of the terms “fault current” and “short circuit current”.

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857 of 2079 10/1/2015 11:02 AM

Public Comment No. 309-NFPA 70-2015 [ Definition: Feeder Short-Circuit and Ground-Fault Protection ]

Feeder Short-Circuit and Ground-Fault Protection

The rating of the feeder protective device is based on the sum of the largest branch-circuit protective device for the specificdevice protecting the feeder (example is 110 A) plus the sum of the full-load currents of the other motors, or 110 A + 40 A +40 A = 190 A. The nearest standard non time delay fuse that does not exceed this value is 175 A [see 240.6 and 430.62(A)].

Feeder Short-Circuit and Ground-Fault Protection Using Inverse Time Circuit Breaker.

The rating of the feeder protective device is based on the sum of the largest branch-circuit protective device for the specificdevice protecting the feeder, plus the sum of the full load currents of the other motors. 250% x 34 Amps = 85 A. The next largerstandard size is 90 A, plus the sum of the full load currents of the other motors or 90 A plus 40 A plus 40 A = 170 A. Thenearest standard breaker that does not exceed this value is 150 A [see 240.6, 430.62(A)].


This PI was misplaced and sent to the wrong panel, then to the wrong section in 430.62. CMP 11 rightfully rejected it as it is informative in nature an belongs in the Annex. The original PIwas submitted as modifying the annex example D8 due to the considerable confusion that exists as to how to calculate the protection of the feeder. This additional example makes the intent clear and prevents feeders from being unprotected by oversizing the short circuit ground fault protection of the feeder. The existing example uses the same kind of branch circuit protection as the feeder, the submitted text provides an additional example to make certain that the "(based on the maximum permitted value for the specific type of overcurrent protective device...)" in 430.62 is in regard to the device protecting the feeder and not one of the branch circuits.This phrase was added to the 1993 code due to the confusion and used a breaker example for substantiation and was unanimously affirmative by the panel in the ROC stage (See11-30-(430.62 (a)) Log 2416, page 451). By including an actual breaker example, this eliminates confusion.

Please note the terra-view software did not allow a plus sign to be added in the formula for the breaker, and the word "plus" was used instead to reduce any misunderstanding.

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Public Input No. 440-NFPA 70-2014 [Definition: Feeder Short-Circuit and Ground-Fault Protection]


Submitter Full Name: JOHN MCCAMISH

Organization: NECA IBEW ELECTRICAL TRAINING

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Submittal Date: Tue Jul 28 13:30:59 EDT 2015


2051 of 2079 10/1/2015 11:02 AM

Public Comment No. 562-NFPA 70-2015 [ Definition: Feeder Short-Circuit and Ground-Fault Protection ]

Feeder Short-Circuit and Ground-Fault Protection

(a) Example using Nontime delay fuse. The rating of the feeder protective device is based on the sum of the largest branch-circuit protective device (example is 110 A) plus for the specific type of device protecting the feeder, 300% x 34 A = 110 A. Plus the sum of the full-load currents of the other motors, or 110 A + 40 A + 40 A = 190 A. The nearest standard fuse that doesnot exceed this value is 175 A [see 240.6 and 430.62(A)].

(b) Example using Inverse Time Circuit Breaker. The largest branch-circuit potective device for the specific type of deviceprotecting the feeder, 250% x 34 A = 85. The next larger standard size is 90 A. Plus the sum of the full-load currents of theother motors, or 90 A (plus sign) 40 A (plus sign) 40 A = 170 A. The nearest standard breaker that does not exceed this valueis 150 A. (see 240.6 and 430.62(A).


The original Public Input 440 was incorrectly identified as a definition and was not directed to CMP-11 for a proposed change to Annex D: Examples, Example D8 as intended by the author. The working in 430.62 is clear but Annex example D8 relating to motor feeder short-circuit and ground-fault protection calculations did not accurately reflect the requirements of 430.62. The key being the inclusion of "for the specific device protecting the feeder" to correspond with 430.62.. The additional example further clarifies the requirement where a different type of protective device is used.

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Public Input No. 440-NFPA 70-2014 [Definition: Feeder Short-Circuit and Ground-Fault Protection]


Submitter Full Name: Rodney Jones

Organization: Clackamas County, Oregon

Affilliation: Self

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Submittal Date: Fri Sep 04 19:38:49 EDT 2015


2052 of 2079 10/1/2015 11:02 AM

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