PROJECT: CLOCOLAN PRIMARY SCHOOL … 10313:2010 Protection against lightning SANS 60947-1 (2008) Low...

PROJECT: CLOCOLAN PRIMARY SCHOOL

DOCUMENT NAME: STAGE 3 ELECTRICAL REPORT

DOCUMENT NUMBER: 201611-01-ELEC-RPT-01-01

PROJECT: CLOCOLAN PRIMARY SCHOOL DOCUMENT NAME: STAGE 3 ELECTRICAL REPORT


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The following signatories have approved the report:

Name Purpose Signature Date

Mohamed Peer Generated 18/01/2016

Revision History

Rev Description Author Pages

A Issued for Review MP All



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Contents

1. Standards Used ..................................................................................................................................... 4

2. Introduction .......................................................................................................................................... 4

3. Electrical Power Supply ......................................................................................................................... 5

4. Building Services ................................................................................................................................... 5

4.1. Power Reticulation ........................................................................................................................ 6

4.2. Lighting Design .............................................................................................................................. 7

4.3. Small Power Design ....................................................................................................................... 7

4.4. Earthing and Lightning Protection ................................................................................................ 8

4.5. Water Heating ............................................................................................................................... 8

4.6. Space Heating and Cooling ........................................................................................................... 8

4.7. Electronic Design ........................................................................................................................... 8

5. Deliverables ........................................................................................................................................... 9

6. Cost ..................................................................................................................................................... 10

APPENDIX A ................................................................................................................................................. 11

APPENDIX B ................................................................................................................................................. 12



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1. Standards Used

Whilst not an exhaustive list, the following standards are used to guide the design of Electrical systems:

SANS 10142-1: 2009 The Wiring of LV Installations

SANS 10114-1:2005 Interior Lighting Part1: Artificial Lighting of Interiors

SANS 10389-1 Exterior Lighting – Part 1: Artificial Lighting of Exterior Areas

SANS 204: Energy Efficiency in Buildings

SANS 10400-XA Energy Usage in Buildings

SANS 10313:2010 Protection against lightning

SANS 60947-1 (2008) Low Voltage Switchgear and Controlgear, Part 1: General Rules

SANS 60947-2 (2007) Low Voltage Switchgear and Controlgear, Part 2: Circuit Breakers

SANS 1507-3 Electric Cables with Extruded Solid Dielectric Insulation for Fixed Installations

2. Introduction

The Department of Education Bloemfontein (Free State) are implementing a project for the construction

of Clocolan Primary School and have appointed SEDTRADE as the lead contractor for the project.

Mohamed Peer is SEDTRADE’s in-house electrical engineer tasked with providing an electrical design for

the facility that is compliant with the Department of Education and SANS standards.

The purpose of this report is to describe and report the Stage 3 design development (Detailed Design) for

the Electrical service for the Clocolan Primary School located in the Free State Province. The Electrical

service is described as Electrical Power Supply, Building Services, Electronic Systems and Power

Reticulation.

The report also provides a preliminary cost budget for the Electrical Works of the project.



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3. Electrical Power Supply

The Electrical Power Supply application shall be submitted to Eskom, requesting a dedicated 350KVA,

400V transformer which will cater for the entire school’s supply demands. This was based on calculations

for the various spaces within the school. Additionally, specific items were included such as sports field

lighting; space heating and cooling (using air-conditioning equipment); food preparation and storage

equipment; stage lighting and sound equipment.

A summary of the load calculation is included in Appendix A.

Provision for a 400V, 50KVA diesel generator was allowed for in the Bill of Quantities. The generator will

cater for the Admin block, walkway and corridor lighting, assembly area and parking are lighting, and the

small power reticulation within a server room (location still to be determined).

4. Building Services

The following areas will be deemed as buildings for this project, namely:

Administration block,

Multi-purpose hall,

Classroom blocks,

Media centre,

Multi-purpose classroom,

Dining nutrition centre,

Guard house and caretaker quarters

Tuck shop, and

Change room.

All equipment specifications and product descriptions are contained within their respective section in the

Bill of Quantities, found in Appendix B.



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4.1. Power Reticulation

All Power Reticulation equipment are specified in the Bill of Quantities, Sections 2 and 5, referring to

cabling and Distribution Board equipment respectively.

4.1.1. Cabling

All cabling shall be sized according to voltage drop over the length of the cable, electrical load

requirement, estimated fault level and derating factors in accordance with SANS 10142-1 and

SANS 1507-3.

Distribution boards shall be manufactured according SANS 10142-1 and specified in the electrical

drawings and Bill of Quantities

Cables shall be routed either by burying in the ground or by running through walls and ceilings. At

all times, all cables shall be protected by PVC conduit.

Electrical cables will have dedicated conduits and will not share conduits with data or

telecommunications cabling to limit electronic interference and reduce the potential for damage

caused by multiple contractors working in the same space.

4.1.2. Metering, Main Switchboard and Distribution Boards

A meter room for the main switchboard shall be required.

The dimensions shall be a minimum of 1500mm wide x 4000mm x 3000mm high.

The location of the meter room shall be determined by the proximity to the nearest Eskom supply

transformer.

The Eskom meter shall be installed within the meter room, feeding the Main Switchboard.

The Main Switchboard is specified in the Bill of Quantities, Section 5.

The main switchboard will house switchgear to feed the following distribution boards, according to the

specification in the Bill of Quantities, Section 5:

Sports Field.

Admin building.

Multi-Purpose Hall.

Media Centre.



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4.2. Lighting Design

All Lighting equipment is specified in the Bill of Quantities, Section 3.

4.2.1. Buildings Internal and External Lighting

Energy efficient luminaires and fixtures shall be specified for both internal and external lighting.

Only luminaires that are commonly available shall be specified to optimize spares availability and

create cost savings.

Consideration has been taken of the lighting requirements of critical task areas, such as office

areas, computer room and laboratories.

Internal lighting shall be controlled using conventional wall switches, except for storage and

ablution areas, where motion sensors shall be used.

External lighting such as corridor and wall mounted lighting shall be controlled by means of

conventional wall mounted switches.

All lighting shall be sourced from Department of Education approved vendors, with all luminaires

bearing an SABS stamp to ensure authentic certification.

All switches shall be specified as the CRABTREE Classic range.

4.2.2. Additional Lighting Requirements

All Lighting equipment is specified in the Bill of Quantities, Section 3.

Parking area lighting will be installed and controlled by means of a photo sensor for automated

control.

A custom stage lighting design will be installed in the hall.

Sport field lighting will be installed around the sport area to ensure adequate lighting for all codes

of sport.

4.3. Small Power Design

All Small Power equipment are specified in the Bill of Quantities, Section 4.



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All socket outlets shall be specified as 3-pin, 16A, 220V deemed sufficient for small hand tools,

laptops and other equipment utilizing 220V AC.

All sockets shall be specified as the CRABTREE Classic range.

Small power designs in the Admin block offices, computer room and server room will be installed

with 3 compartment power skirting to cater for telecoms, data and power requirements.

4.4. Earthing and Lightning Protection

Earthing and Lightning Protection will be required across the campus.

Earthing shall be achieved by means of interlinked earth mats located at various points around

the campus, arranged in such a manner so as to comply to SANS 10142-1.

Lightning protection shall use the Rolling-Ball method of calculating the lightning rod coverage. A

specialist contractor shall complete the installation according to SANS 10313 and provide the

necessary compliance documentation.

4.5. Water Heating

Heat Pumps will be used for water heating in ablution areas.

Hydroboils shall be used in areas where hot water is not required in large quantities.

4.6. Space Heating and Cooling

Air conditioning shall be installed in the laboratories, media centre, multipurpose classroom

computer room and admin block.

4.7. Electronic Design

Security aspects such as CCTV and access control systems shall be installed in and around all

buildings.

CCTV cameras shall be of HD definition and be capable of recording in low light. Cameras shall

be motion activated.



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A biometric (fingerprint) access control system shall be used in the Admin Block and the Media

Centre.

Electric fencing will not be installed.

Telkom lines will be installed to the Admin block, Guard Hut and Multipurpose Hall.

ICT facilities will be installed in the Admin block, the computer room and the media centre.

The school’s IT network shall be accessed by blanket Wifi access across the campus, achieved by

means of Wifi Access Points located strategically throughout the campus. The access points shall

be interconnected by a CAT-6 cable network.

5. Deliverables

1World Consultants shall generate the following deliverables for the project which shall comprise the

design package:

Drawings for:

o The electrical layout of lighting, small power and electronic equipment.

o Main Switchboard and distribution board schematics.

o Site layout of the electrical reticulation showing cable routing.

Bill of Quantities - Final

Equipment Schedule indicating the type and specification of all equipment to be used.

It shall be the responsibility of the contractor to obtain and familiarize themselves with the list of

standards mentioned in Section 1 of this report.



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6. Cost

The preliminary Electrical Works cost is:

ITEM DESCRIPTION AMOUNT R

1 PRELIMINARY AND GENERAL R 150 500

2 CABLING R 2 151 092

3 LIGHTING R 1 373 872

4 SMALL POWER R 150 523

5 DISTRIBUTION BOARDS R 243 600

6 LIGHTNING PROTECTION AND EARTHING R 110 000

7 ELECTRONIC ITEMS R 740 000

8 POWER SUPPLY R 900 000

Total R 5 819 587

Add 10% Contingency R 581 959

Sub Total R 6 401 546

Add VAT @ 14% R 896 216

Grand Total R 6 715 804

Final costs will be calculated once drawings are complete and all cost impacts have been understood.

APPENDIX A

SUMMARY OF THE ELECTRICAL LOAD CALCULATION

APPENDIX B

ELECTRICAL BILL OF QUANTITIES

PROJECT: CLOCOLAN PRIMARY SCHOOL … 10313:2010 Protection against lightning SANS 60947-1 (2008) Low...

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