Azalea Development - Electrical Engineering Services ...

Electrical Engineering Services Report for the

proposed AZALEA Development on ERVEN 46 and 47,

Cape Town

J40029A

Rev 0

July 2020

CLIFTON APARTMENTS

P:\J40029 (Azalea Development)\A\Ebs\03_Project Management Plan Design\G_Document Management - Reports

Electrical Engineering Services Report for the proposed AZALEA Development

on ERVEN 46 and 47, Cape Town

CONTENTS

Chapter Description Page

Revision Status 2

Distribution List 2

Abbreviations / Acronyms / Definitions 2

Appendices 2

1 Introduction 3

2 Development Proposal 3

3 Electrical Infrastructure Design Parameters 3

4 Electricity Supply Authority 3

5 Existing Electricity Infrastructure Supply Capacity 3

5.1 Existing Network Capacity 3

5.2 Existing Electrical Installation 4

6 Proposed Electricity Infrastructure 4

6.1 Low Voltage Infrastructure 4

7 Conclusion 4

Document Control and Disclaimer 8

P:\J40029 (Azalea Development)\A\Ebs\03_Project Management Plan Design\G_Document Management - Reports\Azalea Development -

Electrical Engineering Services Report - REV0.docx

Revision Status

Rev No. Issue Date Revision Description Prepared By Reviewed

By

Approved

By

0 29 July 2020 Original EH Hawkesley D Forster D Forster

Distribution List

Copies to:

Copy 1 of 1 Marielle Penwarden – Chand Environmental Consultants

Abbreviations / Acronyms / Definitions

LV Low Voltage

MV Medium Voltage

TBA To be advised

MDB Main Distribution Board

SDB Sub Distribution Board

COCT City of Cape Town

RMU Ring Main Unit

ADMD After Diversification Maximum Demand

Appendices

Appendix A: AZALEA Development Locality Plan and Substation Location ............................................ 5

Appendix B: City of Cape Town - Electrical Supply Availability E-mail .................................................... 6

Appendix C: Estimate Load Calculation kVA/m² ..................................................................................... 7



1 Introduction

GIBB (Pty) Ltd was requested to compile an Electrical Engineering Services Report for the

proposed AZALEA Development on ERVEN 46 and 47, Clifton, Cape Town, Western Cape.

This report includes an electrical load estimate and describes the requirements to supply

electricity to the development and also addresses the availability of electrical capacity on the

existing City of Cape Town Municipal electrical network.

2 Development Proposal

The site (ERVEN 46 and 47) is located, on 13 Victoria Road, Clifton, Cape Town as shown on the

locality plan attached hereto as Appendix A.

The residential development proposal comprises of two parking levels, people- and car lifts

and 5 new luxury apartments each with an outdoor terrace as shown on the development

proposal plan.

3 Electrical Infrastructure Design Parameters

Energy efficient measures will be applied to reduce the ADMD - After Diversification Maximum

Demand - of the units which includes the installation of energy efficient lighting.

Taking the above energy efficient measures into account the notified maximum demand

(maximum load) of the development is estimated at ±115kVA based on an ADMD figure of

12.227kVA per unit (5 units x 12.227kVA/unit) plus an allowance of ±54kVA for centralized

Cooling/Heating and people- and car lifts.

The electricity distribution system will be designed for the anticipated maximum load to avoid

the need for future upgrading of the electricity network.

4 Electricity Supply Authority

The AZALEA development, Clifton Erven 46 and 47 is located within the City of Cape Town

Municipality area of supply. The municipality supplies the surrounding customers from the

Clifton Terraces Substation, indicated on Appendix A.

5 Existing Electricity Infrastructure Supply Capacity

5.1 Existing Network Capacity

An enquiry for the availability of electricity supply capacity was directed to the

City of Cape Town Municipality. The following has been confirmed regarding the electricity

supply:

• There is no available space on erven 46 and 47 to place a mini-substation or transformer.

• The client will be liable for the cost to upgrade the supply to site (e.g. metering, supply

cable, terminations and point of source circuit breaker).



• The point of source/metering at AZALEA Apartments must be accessible for COCT

electrical staff from the street without and security barriers.

• The Azalea Development - Residential Apartments - Clifton Erven 46 and 47 will be

supplied from Clifton Terraces Substation.

• Clifton Terraces Substation currently have an estimated 200A three phase spare capacity.

• Should the development require more than the available spare capacity, the

Clifton Terraces Substation will be upgraded by COCT municipality at their own cost.

The e-mail from the municipality is attached as Appendix B.

5.2 Existing Electrical Installation

The two existing electrical supplies on site cannot be reused as the total combined ADMD

supply is ±25kVA and should be disconnected and made safe before demolition and

construction commences.

Once the project is in construction phase the existing electrical supplies can possibly be used

for temporary builders electricity supply during construction. This will depend on the

construction contractor’s electrical requirements.

6 Proposed Electricity Infrastructure

The electrical infrastructure required will be designed to comply with the standards and

requirements of the Supply Authority, City of Cape Town Municipality, and where appropriate,

generally in accordance with NRS034-1:1999 - Electricity Distribution Guidelines for the

Provision of Electrical Distribution Networks.

6.1 Low Voltage Infrastructure

The Low Voltage (LV) feeder cables will be installed from the Clifton Terraces Substation to the

development. The infrastructure will be installed on the side of the road reserve, on the

opposite side of other services as far as practically possible.

Provision will be made for municipal split prepaid meters to be installed in each apartment and

the service connection to the consolidated erven will be accessible from the roadside. The LV

installation up to the erf boundaries will be handed over to the municipality.

7 Conclusion

GIBB (Pty) Ltd Engineering and Architecture has investigated the proposed development layout

and engineering constraints of the proposed development and are satisfied that the site is

suitable for the intended development from an electrical engineering point of view.

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Appendix A: AZALEA Development Locality Plan and Substation Location

Clifton Terraces Substation

AZALEA Development

13 Victoria Road (ERVEN 46 & 47)



Appendix B: City of Cape Town - Electrical Supply Availability E-mail

From: Michael Schmidt <[email protected]>

Sent: 28 July 2020 5:35 PM

To: Edward Hawkesley <[email protected]>

Subject: RE: Azalea Development - Residential Apartments - Clifton Erven 46 and 47 - Electrical Bulk Supply Availability

Hi Edward

Correct !

Please note that the connection will comprise of: (1) electricity meters, (2) cable from Clifton Terraces substation to the meter board

including excavation and reinstatement, termination at both ends and the MCCB in the transformer, (3) SNC at the MV/LV rate for capacity

uprate from the authorised ADMD capacity of the 2 single-residential erven to the final supply requirement. At R 2 151,05/increase of kVA

(2020/2021 rate) this is likely to be the largest cost component – refer to 1st attachment.

The tariff applicable to the apartments is Home User and the for the general supply it would be SPU1 – refer to 2nd attachment.

Also find attached the City’s general tariff policies of 2019/2020 and the PPM policy. In particular, section 9 is applicable to residential

sectional title buildings.

Kind regards,

Michael Schmidt (PrEng)

Electricity and Climate Change

Service Connection Planning - Area North

6th floor, Electricity House, 51 Buitengracht Street, Cape Town

Tel: 021 444 2178 / Email: [email protected] / Website: www.capetown.gov.za

From: Edward Hawkesley <[email protected]>

Sent: Tuesday, 28 July 2020 11:54 AM

To: Michael Schmidt <[email protected]>

Subject: RE: Azalea Development - Residential Apartments - Clifton Erven 46 and 47 - Electrical Bulk Supply Availability

Hi Michael

As discussed, please confirm the following:

• There is no available space on erven 46 & 47 to place a mini-sub or transformer, thus

• The client will be liable for the cost to upgrade the supply to site (e.g. metering, supply cable, point of source circuit breaker)

• The point of source/metering must be accessible for COCT electrical staff from street access without and security barrier.

• The Azalea Development - Residential Apartments - Clifton Erven 46 & 47 will be supplied from Clifton Terraces Substation.

• Clifton Terraces Substation currently have an estimated 200A three phase space capacity.

• Should the development require more than the available spare capacity the Clifton Terraces Substation will be upgraded by

COCT at their own cost.

Could you please send me the COCT Electricity Services Directive.

Kind Regards

Edward Hawkesley



Appendix C: Estimate Load Calculation kVA/m²

Azalea Development - Clifton ERVEN 46 & 47Electrical Load Estimate

High Level Load Estimate (W/m²):

Floor space

Terraces Covered

Outdoor Area

m² m² m²

Level 8 E - Roof Terrace (MEP) 95 128Level 7 E - Upper 240 81Level 6 E - Lower 318 94Level 5 D 400 123Level 4 C 502 146Level 3 B 594 150Level 2 A-Upper 585 82 112Level 1 A-Lower 215Ground level Parking 86B1 - Parking B2 - Entry 152 82

3187 82 916

Total Covered Floor Space 3269 0

Development Connected Load Estimation:

Total LoadPower Factor

Total LoadTotal

Diversified Load

W m²/Qty kW p.f. kVA kVA

General Lighting 3.5 3269 11.4415 0.9 12.7127778 0.5 6.356388889Socket-Outlets: Appliance LoadsApartment A 800 12 0.9 13.3333333 0.5 6.666666667Apartment B 594 10 0.9 11.1111111 0.5 5.555555556Apartment C 502 9 0.9 10 0.5 5Apartment D 400 8 0.9 8.88888889 0.5 4.444444444Apartment E 653 11 0.9 12.2222222 0.5 6.111111111

Stoves & Ovens 5000 5 25 0.9 27.7777778 0.5 13.88888889Geysers 2500 5 12.5 0.9 13.8888889 1 13.88888889

General HVAC Plant 48 2949 141.552 0.9 157.28 0.5 78.64

People Lift 4500 1 4.5 0.9 5 1 5Car lift 6000 2 12 0.9 13.3333333 1 13.33333333

256.9935 285.548333 158.8852778

158.885278 0.72 114.3974165.1184242Three Phase Current (A)

Total Load

Load 4: Motor Loads

Total Diversified Load (kVA) SANS 10142-1:2017(C.3 b))

Apartment Number

Load Load Description

Load 1: General Lighting & Appliance loads

Load 2: Other Equipment Loads

Load 3: Heating/Cooling Loads

Storey

5kW for 1st 100m² + 1kW for

every other 100m²

Diversity Factor



Document Control and Disclaimer FORM IP180_B

CLIENT : Chand Environmental Consultants

PROJECT NAME : AZALEA Development PROJECT No. : J40029A

TITLE OF DOCUMENT : Stage 1 and 2 Concept Design Report

ELECTRONIC LOCATION : P:\J40029 (Azalea Development)\A\Ebs\03_Project Management Plan

Design\G_Document Management - Reports\Azalea Development - Electrical

Engineering Services Report - REV0.docx

Approved By

Project Executive

Reviewed By Prepared By

ORIGINAL NAME

Dennis Forster

NAME

Dennis Forster

NAME

EH Hawkesley

DATE

29/07/2020

SIGNATURE

SIGNATURE

SIGNATURE

Approved By

Project Executive

Reviewed By Prepared By

REVISION NAME

NAME

NAME

DATE

SIGNATURE

SIGNATURE

SIGNATURE

This report, and information or advice, which it contains, is provided by GIBB (or any of its related entities) solely for

internal use and reliance by its Client in performance of GIBB’s duties and liabilities under its contract with the Client.

Any advice, opinions, or recommendations within this report should be read and relied upon only in the context of

the report as a whole. The advice and opinions in this report are based upon the information made available to

GIBB at the date of this report and on current South African standards, codes, technology and construction practices

as at the date of this report. Following final delivery of this report to the Client, GIBB will have no further obligations

or duty to advise the Client on any matters, including development affecting the information or advice provided in

this report. This report has been prepared by GIBB in their professional capacity as Consulting Engineers. The

contents of the report do not, in any way, purport to include any manner of legal advice or opinion. This report is

prepared in accordance with the terms and conditions of the GIBB contract with the Client. Regard should be had

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obligations to that Third Party, and

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GIBB interests arising out of the Client's release of this report to the Third Party.

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