ts108 technical standard for distribution equipment and transformer rooms

7/28/2019 Ts108 Technical Standard for Distribution Equipment and Transformer Rooms

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Copyright 2010

TS-108 Issue: MAY 2012 Authorised: Jehad Ali Date: 16/05/12 Page 1 of 31The use of this Technical Standard is subject to the conditions stated in ETSA Utilities disclaimer.

TECHNICAL STANDARD TS-108FOR DISTRIBUTION EQUIPMENT

AND

TRANSFORMER ROOMS

PUBLISHED: MAY 2012


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TS-108 Technical Standard for Distribution Equipment and Transformer Rooms


REVISION NOTICE:

DATE EXPLANATION

November 2008 New Document

December 2011

Restructured the document to current standards. Added new clauses 3.0, 7.0, 12.0. Removed check list (Appendix A) and transferred

into TS- 105 A form series as new form TS 105 -F-40 .

May 2012 Amendments to clauses 5.0, 6.3, 9.4, 9.5, 9.7.1, 9.8.1,

9.8.2.1, 9.8.2.2, 9.9, 9.9.1, 10.1 and 11.2 Replaced Figure 1

ETSA Utilities - ETSA Utilities means Distribution Lessor Corporation subject to a twohundred year lease to the partnership of companies trading as ETSA Utilities or ETSA Utilitiesin its own right. ETSA Utilities, ABN 13 332 330 749, a partnership of:

CKI Utilities Development Limited, ABN 65 090 718 880.HEI Utilities Development Limited, ABN 82 090 718 951.each incorporated in The BahamasSpark Infrastructure SA (No.1) Pty Ltd, ABN 54 091 142 380.Spark Infrastructure SA (No.2) Pty Ltd, ABN 19 091 143 038.Spark Infrastructure SA (No.3) Pty Ltd, ABN 50 091 142 362.each incorporated in Australia.

1 Anzac Highway, Keswick, South Australia, 5035.

ETSA Utilities Disclaimer:1. The use of the information contained in this Technical Standard is at your sole risk.2. The Information in this Technical Standard is subject to change without notice.3. ETSA Utilities, its agents, instrumentalities, officers and employees:

a. Make no representations, express or implied, as to the accuracy of the informationcontained in this Technical Standard;

b. Accept no liability for any use of the said information or reliance placed on it; andc. Make no representations, either expressed or implied, as to the suitability of the said

information for any particular purpose.4. ETSA Utilities and its agencies and instrumentalities do not endorse or in any respect

warrant any third party products or services by virtue of any information, material or content referred to or included on, or linked from or to this Technical Standard.

ETSA Utilities Copyright 2012:This publication is copyright. ETSA Utilities reserves to itself all rights in such material. Youmust not reproduce any content of this Technical Standard by any process without firstobtaining ETSA Utilities permission, except as permitted under the Copyright Act 1968.

All rights reserved.


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CONTENTS

1.0 PURPOSE ................................................................................. 6

2.0 SCOPE .................................................................................... 6

3.0 GRACE PERIOD ...................................................................... 7

4.0 REFERENCES ........................................................................... 7

5.0 DEFINITIONS ........................................................................... 9

6.0 DISTRIBUTION TRANSFORMER ROOM LOCATION ............... 12

6.1 SITELOCATION .................................................................. 12

6.2

DISTRIBUTIONTRANSFORMER ROOM LOCATION ....................... 12

6.3 DISTRIBUTIONTRANSFORMER ROOM SIZE................................ 13

7.0 LAND TENURE ....................................................................... 15

7.1 FORM OF TENURE............................................................... 15

7.2 EASEMENTDOCUMENTATION PROVISIONS .............................. 15

7.2.1 Exclusively Enclosed Building Area for Housing T/F .... 15

7.2.2 Cables and other Physical Services ............................. 15

7.2.3 Ventilation ....................................................................... 15 7.2.4 Access by Personnel, Equipment and Vehicles .......... 15

7.3 THIRD PARTYLAND ............................................................. 16

7.4 LANDOWNER AGREEMENT ................................................... 16

7.5 C OSTS ............................................................................. 16

8.0 ACCESS REQUIREMENTS............................................................. 16

8.1 SLOPING G ROUND C ONDITIONS .......................................... 16

8.2 PERSONNEL SAFETY ANDACCESS ......................................... 17

8.3 EQUIPMENT ACCESS ........................................................... 17

8.3.1 Equipment and Personnel Doors ................................... 18

8.3.2 Personnel Doors with Stairs ............................................. 18

8.3.3 Hatchway Type Entrances ............................................. 18

8.3.4 Safety Signs ..................................................................... 18

8.3.5 Hardware ......................................................................... 19

8.3.5.1 Access Route to the Distribution T/F Room .. 19


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8.4 HAZARDOUS LOCATIONS ..................................................... 19

8.5 AVOIDANCE OF SERVICES AND ENCROACHMENTS ................... 19

8.6 NOISE.............................................................................. 19

9.0 CONSTRUCTION REQUIREMENTS ......................................... 20 9.1 G ENERAL.......................................................................... 20

9.2 FOUNDATION REQUIREMENTS............................................... 20

9.3 DRAINAGE AND WATERPROOFING ........................................ 21

9.3.1 Site Drainage ................................................................... 21

9.3.2 Area Drainage ................................................................ 21

9.3.3 Water Tightness ............................................................... 21

9.3.4 Methods ........................................................................... 21

9.4 WALLS AND C EILINGS......................................................... 21

9.5 FLOORS ............................................................................ 21

9.6 VENTILATION..................................................................... 22

9.6.1 Natural Ventilation .......................................................... 23

9.6.2 Forced Ventilation .......................................................... 23

9.6.3 Distribution T/F Space & Ventilation Requirements ...... 23

9.6.4 Special Requirements for Ventilation Ducts ................. 24

9.7 FIRE................................................................................. 24

9.7.1 Fire Detection and Alarm Settings ................................. 24

9.7.2 Fire Fighting Systems ....................................................... 24

9.7.3 Fire Segregations ............................................................ 24

9.8 C ABLESUPPORTS ............................................................... 25

9.8.1 General ............................................................................ 25

9.8.2 Approved Supports and Enclosures .............................. 25

9.8.2.1 Buried Conduit:............................................... 25

9.8.2.2 Supported/Enclosed Conduit ....................... 25

9.9 HAULING EYES .................................................................. 26

9.9.1 For Cables & Distribution Transformers .......................... 26

9.10 O ILC ONTAINMENT ............................................................ 26

9.11

ADDITIONALREQUIREMENTS................................................. 26


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10.0 PROVISION OF PERMANENT SUPPLY .................................... 27

10.1 INCOMING HIGH VOLTAGE SUPPLY....................................... 27

10.2 APPROVAL ....................................................................... 27

10.3 INSTALLATIONS.................................................................. 28 10.4 INSPECTIONS ..................................................................... 28

11.0 AGREEMENTS, APPROVALS AND CONSTRUCTION ............. 28

11.1 SAFETY ANDC LEARANCES................................................... 28

11.2 EARTHING REQUIREMENTS.................................................... 29

11.3 STANDARD DESIGNS ........................................................... 29

11.4 INSPECTIONS ..................................................................... 30

11.5 C ERTIFICATES OFC OMPLIANCE - C ONSTRUCTION ................... 30

11.6 LIGHTING AND POWER WITHIN T/F ROOM ENCLOSURE.............. 31

11.6.1 Temporary (During Construction Stage) ....................... 31

11.6.2 Permanent ....................................................................... 31

12.0 MAINTENANCE/R EPAIR OF THE DIST. T/F ROOM ............................. 31


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1.0 PURPOSEThis Technical Standard specifies the standard distribution equipment anddistribution transformer room s location, land tenure, access, construction andprovision of permanent supply requirements for a new or upgraded installation

that will be a component of ETSA Utilities distribution network.It will assist ETSA Utilities customers/landowners (i.e. the registered proprietors ofland) in the planning of a development once it is established that a distributionequipment and distribution transformer room will be required within thecustomers/ landowners building or in a separate building on the property inorder to meet the electricity supply requirements.

Furthermore it will assist in clarifying the customers/landowners responsibilities,agreements, approvals, construction and certificate of compliance process.This document also provides guidelines in carrying out duties in safe, reliableand cost effective way with the activities associated with distribution

equipment and distribution transformer rooms.2.0 SCOPE

The specification in this technical standard is applicable (but not limited) for thedistribution transformers which are nominally 33kV/0.4kV or 11kV/0.4kV and witha capacity of 2000kVA or less. The construction of a distribution transformer room is principally governed by the requirements of the Electricity (General)Regulations 1997, other statutory authority requirements and the Building Codeof Australia.

Timely advice enables ETSA Utilities to outline the distribution transformer roomand underground cable requirements, to assess the impact of thedevelopment on the distribution system and to plan any associated work sothat supply can be made by the required date. The construction of thedistribution transformer room and compliance to the technical standard is thecustomer/landowner s (i.e. the registered proprietors of land) responsibility.

For further assistance/information concerning this technical standard, pleasecontact the relevant ETSA Utilities Manager. This technical standard is availableat the ETSA Utilities websites below:

On Intranet (for Internal use):1. Technical Standards Series

2. NICC Brochures Series On Internet (for External use):

1. Technical Standards Series 2. NICC Brochures Series

The use of this Technical Standard is subject to the conditions stated inETSA Utilities disclaimer.
http://intranet/networkmanagement/standardsandperformance/techstandards/tsindex.htmhttp://intranet/networkmanagement/standardsandperformance/techstandards/tsindex.htmhttp://intranet/networkmanagement/standardsandperformance/networkinfo.htmhttp://intranet/networkmanagement/standardsandperformance/networkinfo.htmhttp://www.etsautilities.com.au/centric/contractors_and_designers/technical_standards.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/technical_standards.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/network_information_for_contractors_and_customers.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/network_information_for_contractors_and_customers.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/network_information_for_contractors_and_customers.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/technical_standards.jsphttp://intranet/networkmanagement/standardsandperformance/networkinfo.htmhttp://intranet/networkmanagement/standardsandperformance/techstandards/tsindex.htm


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3.0 GRACE PERIODThe maximum grace period acceptable by ETSA Utilities for implementing thisStandard is 3 months from the date of publication. Any new design submittedfor a Single Customer installation must reflect this current Standard immediately.

All projects that are not in receipt of Specification Compliance at the reviseddate of issue for this technical standard will need to incorporate the latestrequirements. This is applicable to both the design and construction phases ofthe project.

The validity period for a Specification Compliance is 60 days. On the expiry ofa Specification Compliance , any specification change without adocumented exemption must be incorporated into the design andconstruction of ETSA Utilities infrastructure.

4.0 REFERENCES

The following listed documents are for additional information. It is advisable torefer to the current publications before implementing them. Other documentation may be required on a project specific basis.

Essential Services Commission of South Australia (ESCOSA) Codes: SA Electricity Distribution Code (EDC)

Energy Networks Association (AUS) Publications: ENA NENS 03 - 2006 - National Guidelines for Safe Access to Electrical and Mechanical Apparatus ENA NENS 04 - 2006 - National Guidelines for Safe Approach Distances to

Electrical and Mechanical Apparatus

South Australian Legislation:This technical standard does not necessarily align with AS/NZS StandardsAustralia Publications.

SA Electricity Act 1996 SA Electricity (General) Regulations 1997 SA OHS&W Act 1986 SA OHS&W Regulations 2010

Environment, Heritage and Native Vegetation Protection Acts: Environment Protection Act 1993 Environment Protection Regulations 2009 Aboriginal Heritage Act 1988 Native Vegetation Act 1991 Heritage Places Act 1993 National Parks & Wildlife Act 1972 Natural Resources Management Act 2004

The Building Code of Australia Publications: BCA - Building Code of Australia, Class 2 to Class 9 Buildings, Sections F and E
http://www.escosa.sa.gov.au/electricity-overview/codes-guidelines-rules/electricity-codes.aspxhttp://www.escosa.sa.gov.au/electricity-overview/codes-guidelines-rules/electricity-codes.aspxhttp://infostore.saiglobal.com/store/details.aspx?ProductID=589398http://infostore.saiglobal.com/store/details.aspx?ProductID=589398http://infostore.saiglobal.com/store/Details.aspx?productID=589399http://infostore.saiglobal.com/store/Details.aspx?productID=589399http://www.legislation.sa.gov.au/LZ/C/A/ELECTRICITY%20ACT%201996.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/ELECTRICITY%20ACT%201996.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/Electricity%20(General)%20Regulations%201997.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/Electricity%20(General)%20Regulations%201997.aspxhttp://www.legislation.sa.gov.au/lz/c/a/occupational%20health%20safety%20and%20welfare%20act%201986.aspxhttp://www.legislation.sa.gov.au/lz/c/a/occupational%20health%20safety%20and%20welfare%20act%201986.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/OCCUPATIONAL%20HEALTH%20SAFETY%20AND%20WELFARE%20REGULATIONS%202010.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/OCCUPATIONAL%20HEALTH%20SAFETY%20AND%20WELFARE%20REGULATIONS%202010.aspxhttp://www.legislation.sa.gov.au/lz/c/a/environment%20protection%20act%201993.aspxhttp://www.legislation.sa.gov.au/lz/c/a/environment%20protection%20act%201993.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/ENVIRONMENT%20PROTECTION%20REGULATIONS%202009.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/ENVIRONMENT%20PROTECTION%20REGULATIONS%202009.aspxhttp://www.legislation.sa.gov.au/lz/c/a/aboriginal%20heritage%20act%201988.aspxhttp://www.legislation.sa.gov.au/lz/c/a/aboriginal%20heritage%20act%201988.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Native%20Vegetation%20Act%201991.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Native%20Vegetation%20Act%201991.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Heritage%20Places%20Act%201993.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Heritage%20Places%20Act%201993.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/NATIONAL%20PARKS%20AND%20WILDLIFE%20ACT%201972.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/NATIONAL%20PARKS%20AND%20WILDLIFE%20ACT%201972.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Natural%20Resources%20Management%20Act%202004.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Natural%20Resources%20Management%20Act%202004.aspxhttp://www.sa.gov.au/subject/Housing%2C+property+and+land/Customer+entry+points+and+contacts/Industry+professional+entry+point/Building+industry+professionals/Technical+building+standards+and+rules/The+Building+Code+of+Australia#The_Building_Code_of_Austrahttp://www.sa.gov.au/subject/Housing%2C+property+and+land/Customer+entry+points+and+contacts/Industry+professional+entry+point/Building+industry+professionals/Technical+building+standards+and+rules/The+Building+Code+of+Australia#The_Building_Code_of_Austrahttp://www.sa.gov.au/subject/Housing%2C+property+and+land/Customer+entry+points+and+contacts/Industry+professional+entry+point/Building+industry+professionals/Technical+building+standards+and+rules/The+Building+Code+of+Australia#The_Building_Code_of_Austrahttp://www.legislation.sa.gov.au/LZ/C/A/Natural%20Resources%20Management%20Act%202004.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/NATIONAL%20PARKS%20AND%20WILDLIFE%20ACT%201972.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Heritage%20Places%20Act%201993.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/Native%20Vegetation%20Act%201991.aspxhttp://www.legislation.sa.gov.au/lz/c/a/aboriginal%20heritage%20act%201988.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/ENVIRONMENT%20PROTECTION%20REGULATIONS%202009.aspxhttp://www.legislation.sa.gov.au/lz/c/a/environment%20protection%20act%201993.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/OCCUPATIONAL%20HEALTH%20SAFETY%20AND%20WELFARE%20REGULATIONS%202010.aspxhttp://www.legislation.sa.gov.au/lz/c/a/occupational%20health%20safety%20and%20welfare%20act%201986.aspxhttp://www.legislation.sa.gov.au/LZ/C/R/Electricity%20(General)%20Regulations%201997.aspxhttp://www.legislation.sa.gov.au/LZ/C/A/ELECTRICITY%20ACT%201996.aspxhttp://infostore.saiglobal.com/store/Details.aspx?productID=589399http://infostore.saiglobal.com/store/details.aspx?ProductID=589398http://www.escosa.sa.gov.au/electricity-overview/codes-guidelines-rules/electricity-codes.aspx


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Department of Planning Transport & Infrastructure Publications: Application Form for Road works & Closures on Roads Notification of Works Impacting DPTI Roads Specification for Excavation and Reinstatement of Road Pavements

Standards Australia Publications: AS/NZS 1158 - Lighting for Roads and Public Spaces Set AS1319 Safety Signs for the occupational Environment AS 1345 - Identification of the Contents of Pipes, Conduits and Ducts AS 1668.2 - The Use of Ventilation and Air Conditioning in Buildings. AS 60038 - Standard Voltages AS/NZS 2032 - Installation of PVC pipe systems AS/NZS 2053 - Conduits and Fittings for Electrical Installations Part 1 & 2 -

General Requirements AS 2067 - Substations and High Voltage Installations exceeding 1 kV A.C. AS/NZS 2648.1 - Underground Marking Tape - Non-Detectable Tape AS 2885.1 - Pipelines - Gas and Liquid Petroleum - Design and Construction AS/NZS 3000 - Electrical Installations (known as the AS/NZ Wiring Rules) AS/NZS 3500 (Set) - Plumbing and Drainage Set AS 3798 - Guidelines on earthworks for commercial and residential

developments AS/NZS 4645.3 - Gas Distribution Networks - Plastics Pipe Systems AS 4678 - Earth-Retaining Structures

AS 4799 - Installation of Underground Utility Services and Pipelines withinRailway Boundaries

AS/NZS ISO 31000 - Risk Management - Principles and Guidelines AS/NZS ISO 14001:2004 Environmental Management System Standard AS/ACIF S009 - Installation requirements for customer cabling

ETSA Utilities Documents:The construction must comply with the latest issue of the following ETSA Utilitiespublications current at the time of commencement of the Works and thefollowing publications as determined by ETSA Utilities from time to time will be

considered to be incorporated in, and form part of, this Technical Standard. Service and Installation Rules Technical Standards NICC Brochures Relevant E-Drawing Series
http://www.transport.sa.gov.au/forms/index.asphttp://www.transport.sa.gov.au/forms/index.asphttp://www.dpti.sa.gov.au/documents/contractsandtenders/works_on_roads_by_other_organisationshttp://www.dpti.sa.gov.au/documents/contractsandtenders/works_on_roads_by_other_organisationshttp://www.dpti.sa.gov.au/documents/contractsandtenders/works_on_roads_by_other_organisationshttp://www.dpti.sa.gov.au/documents/contractsandtenders/works_on_roads_by_other_organisationshttp://infostore.saiglobal.com/store2/Details.aspx?ProductID=1387409http://infostore.saiglobal.com/store2/Details.aspx?ProductID=1387409http://infostore.saiglobal.com/store/Details.aspx?ProductID=223535&gclid=CNrf5uGsj60CFcF56wodvhOelQhttp://infostore.saiglobal.com/store/Details.aspx?ProductID=223535&gclid=CNrf5uGsj60CFcF56wodvhOelQhttp://infostore.saiglobal.com/store/details.aspx?ProductID=224345http://infostore.saiglobal.com/store/details.aspx?ProductID=224345http://infostore.saiglobal.com/store/Details.aspx?ProductID=235971&gclid=CJLT3-6sj60CFUIa6wodK2lwnAhttp://infostore.saiglobal.com/store/Details.aspx?ProductID=235971&gclid=CJLT3-6sj60CFUIa6wodK2lwnAhttp://infostore.saiglobal.com/store/Details.aspx?ProductID=321155http://infostore.saiglobal.com/store/Details.aspx?ProductID=321155http://infostore.saiglobal.com/store/Details.aspx?ProductID=362775http://infostore.saiglobal.com/store/Details.aspx?ProductID=362775http://infostore.saiglobal.com/store/Details.aspx?ProductID=362938http://infostore.saiglobal.com/store/Details.aspx?ProductID=362938http://infostore.saiglobal.com/store/Details.aspx?ProductID=1087963&gclid=CI282M6sj60CFUca6wodxggfmAhttp://infostore.saiglobal.com/store/Details.aspx?ProductID=1087963&gclid=CI282M6sj60CFUca6wodxggfmAhttp://infostore.saiglobal.com/store/Details.aspx?ProductID=366068http://infostore.saiglobal.com/store/Details.aspx?ProductID=366068http://infostore.saiglobal.com/store/Details.aspx?ProductID=287675http://infostore.saiglobal.com/store/Details.aspx?ProductID=287675http://infostore.saiglobal.com/store/Details.aspx?ProductID=366926http://infostore.saiglobal.com/store/Details.aspx?ProductID=366926http://infostore.saiglobal.com/store/Details.aspx?ProductID=372892http://infostore.saiglobal.com/store/Details.aspx?ProductID=372892http://infostore.saiglobal.com/store/Details.aspx?ProductID=304347http://infostore.saiglobal.com/store/Details.aspx?ProductID=304347http://infostore.saiglobal.com/store/Details.aspx?ProductID=1089795http://infostore.saiglobal.com/store/Details.aspx?ProductID=1089795http://infostore.saiglobal.com/store/Details.aspx?ProductID=317062http://infostore.saiglobal.com/store/Details.aspx?ProductID=317062http://infostore.saiglobal.com/store/Details.aspx?ProductID=318174http://infostore.saiglobal.com/store/Details.aspx?ProductID=318174http://infostore.saiglobal.com/store/Details.aspx?ProductID=1378670http://infostore.saiglobal.com/store/Details.aspx?ProductID=1378670http://infostore.saiglobal.com/store/Details.aspx?docn=AS0733764061AThttp://infostore.saiglobal.com/store/Details.aspx?docn=AS0733764061AThttp://infostore.saiglobal.com/store/Details.aspx?ProductID=355274http://infostore.saiglobal.com/store/Details.aspx?ProductID=355274http://www.etsautilities.com.au/centric/contractors_and_designers/service_and_installation_rules.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/service_and_installation_rules.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/technical_standards.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/technical_standards.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/network_information_for_contractors_and_customers.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/network_information_for_contractors_and_customers.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/network_information_for_contractors_and_customers.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/technical_standards.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/service_and_installation_rules.jsphttp://infostore.saiglobal.com/store/Details.aspx?ProductID=355274http://infostore.saiglobal.com/store/Details.aspx?docn=AS0733764061AThttp://infostore.saiglobal.com/store/Details.aspx?ProductID=1378670http://infostore.saiglobal.com/store/Details.aspx?ProductID=318174http://infostore.saiglobal.com/store/Details.aspx?ProductID=317062http://infostore.saiglobal.com/store/Details.aspx?ProductID=1089795http://infostore.saiglobal.com/store/Details.aspx?ProductID=304347http://infostore.saiglobal.com/store/Details.aspx?ProductID=372892http://infostore.saiglobal.com/store/Details.aspx?ProductID=366926http://infostore.saiglobal.com/store/Details.aspx?ProductID=287675http://infostore.saiglobal.com/store/Details.aspx?ProductID=366068http://infostore.saiglobal.com/store/Details.aspx?ProductID=1087963&gclid=CI282M6sj60CFUca6wodxggfmAhttp://infostore.saiglobal.com/store/Details.aspx?ProductID=362938http://infostore.saiglobal.com/store/Details.aspx?ProductID=362775http://infostore.saiglobal.com/store/Details.aspx?ProductID=321155http://infostore.saiglobal.com/store/Details.aspx?ProductID=235971&gclid=CJLT3-6sj60CFUIa6wodK2lwnAhttp://infostore.saiglobal.com/store/details.aspx?ProductID=224345http://infostore.saiglobal.com/store/Details.aspx?ProductID=223535&gclid=CNrf5uGsj60CFcF56wodvhOelQhttp://infostore.saiglobal.com/store2/Details.aspx?ProductID=1387409http://www.dpti.sa.gov.au/documents/contractsandtenders/works_on_roads_by_other_organisationshttp://www.dpti.sa.gov.au/documents/contractsandtenders/works_on_roads_by_other_organisationshttp://www.transport.sa.gov.au/forms/index.asp


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5.0 DEFINITIONS Agreement to Grant Easement - An agreement letter signed by the registeredproprietor of land agreeing to allow ETSA Utilities to cross their property with our equipment and that they will grant to ETSA Utilities a formal easement on

completion of the works. See Appendix C for Standard letter for use when theCustomer is required to obtain the required agreement to grant easement fromthe affected property owner, NOT ETSA Utilities.

AS/NZS 3000 Wiring Rules - means the current version of the Wiring Rulespublished by Standards Australia.

Authorised Person - the person in charge of the premises, or the registeredelectrical worker or licensed electrical contractor or other person appointed or selected by the person in charge of the premises, to perform certain dutiesassociated with the electrical installation on the premises.

Authorised Service Capacity - the demand capacity as detailed in the Offer

for Supply which was accepted by the customer. This is the maximum demandcapacity that the Service Protection Device, Consumers Terminals andupstream Distribution System have been designed to provide for. When acustomer requests a reduction to their Agreed Maximum Demand the newAgreed Maximum Demand will become the Authorised Service Capacity.

Connection Point - has the meaning given to that term in the Electricity(General) Regulations 1997, namely a connection point to a transmission or distribution network. For the purpose of this document connection point alsohas the same meaning as Point of Supply as defined in AS/NZS 3000.

Consumers Mains - are the electrical cables/conductors, owned and

maintained by the customer, connecting the point of supply and the mainswitchboard and form part of the customers/landowners installation.

Consumers Terminals - the junction at which the consumer main connects tothe ETSA Utilities service cable or main supply conductors.

CT Metering - a meter where electricity flow is measured by a meter usingcurrent transformers (CT s). Note: CT meters are used where the maximumdemand of the installation is more than 100 amps.

Customer - has the meaning given to that term in the Electricity Act 1996,namely a person who has a supply of electricity available from a transmission or distribution network for consumption by that person and includes:

The occupier for the time being of a place to which electricity is supplied; Where the context requires, a person seeking an electricity supply; and A person of a class declared by regulation to be customers/ landowners. Customer may or may not necessarily be the landowner.

Customer Agent/s - Customer agents are parties representing the customers.Such parties may include registered electrical workers, licensed electricalcontractors, consulting engineers, architects, and equipment manufacturers.

Determined Maximum Demand - means the demand imposed on theDistributor s supply system as assessed by the Responsible Officer.


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Distribution Network - has the meaning given to that term in the Electricity Act1996, namely the whole or a part of a system for the distribution of electricity,but does not include anything declared by regulation not to be a distributionnetwork or part of a distribution network. For the purposes of these rulesreferences to Distribution Network means the network poles, wires, underground

cables, transformers, substations etc, operated by ETSA Utilities, which transportselectricity from the transmission system to a customer s Connection Point.

Distribution Transformer - A distribution transformer which forms a part of thedistribution network, typically with a secondary voltage of less than 1,000V A.C.

Distribution Transformer Enclosure - An open room adjacent to abuilding/structure or a free standing building/structure, which does not have aroof enclosed with a minimum of three walls, is considered as a DistributionTransformer/Equipment Room.

Note: This type of transformer enclosure does not apply to residentialdevelopment where domestic style fencing encloses the transformer. For details of requirements for these enclosures refer to ETSA Utilities documentNICC-802.

Distribution Transformer Room - A room within a building/structure or a freestanding building/structure which has a roof enclosed within a minimum ofthree walls and houses distribution transformer and/or distribution equipment.

Easement - The right to enter private property, to erect, or lay and maintaininfrastructure subject to any condition stated in the easement document.

Electricity Distribution Code - means the Electricity Distribution Codeadministered by the Essential Services Commission of S.A.

Electrical Installation - has the meaning given to that term in the Electricity Act1996, namely a set of wires and associated fittings, equipment and accessoriesinstalled in a place for the conveyance, control, measurement and/or use ofelectricity that is, or is to be, or has been, supplied for consumption in the place,but does not include:

Electricity infrastructure owned or operated by an electricity entity; and Any wires, fittings, equipment or accessories connected to and beyond any

electrical outlet at which fixed wiring terminates (other than any such outletused to connect sections of fixed wiring).

ETSA Utilities Manager - The ETSA Utilities Manager or the Authorised Officer

serving that area of the customer s installation. Fire Rating - For the purpose of this document the fire rating relates to the fireresistance periods for structural adequacy, integrity and insulation.

High Voltage (HV) - For the purpose of this document, shall mean a voltageexceeding 1,000V A.C. upto and including 33,000V A.C.

Landowner - The Landowner is the person or entity that is the registeredproprietor/owner of the land as recorded at the Lands Titles Office.

Must - is to be understood as mandatory.

Occupancy - means an electrical installation or part thereof, which is supplied

with electricity through a specific meter or meters and for which an individualelectricity consumption account is rendered.


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Offer Letter - means a letter documenting an offer by ETSA Utilities to a customer in relation to a contract to undertake and complete works for the supply ofelectricity.

Point of Supply - Refer to Connection Point.

Property - For the purpose of this document Property means land on whichthe single electricity customer or controlling body or their representatives havethe right to install their electrical installation.

A property may include: A single parcel of freehold, leasehold and/or public land, and/or land held

under lease or licence on which the customer or controlling body has theright to install their electrical installation;

Any combination of contiguous land to which the customer or controllingbody has the right to install their electrical installation; and

Contiguous land and/or individual titles to which a corporate body,customer and or controlling body has the right to install their electricalinstallation.

Public Land - has the meaning given to that term in the Electricity Act 1996,namely land owned by the Crown or an instrumentality or agent of the Crownor by a council or other local government body, including any such land that issubject to native title.

Requested Maximum Demand - the maximum demand that the Customer or their agent have requested to be provided (as determined under AS/NZS3000or by other method).

Retailer - a holder of a licence under the South Australian Electricity Act, 1996

authorised to retail electricity. Service Point - Refer to Connection Point.

Service Protection Device - a device provided by ETSA Utilities, generally a fusebut may be a circuit breaker for larger installations, to protect ETSA Utilitiesassets.

Shall - is to be understood as mandatory.

Should - is to be understood as non mandatory, i.e. advisory or recommended.

Underground Service - The electricity distributors supply network to the point ofsupply.


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6.0 DISTRIBUTION TRANSFORMER ROOM LOCATION6.1 Site Location

Most distribution transformer sites are likely to include a Padmounttransformer and associated switchgear / ring main units. Some sitesmay require multiple Padmount transformers and ring main unitsdepending on the total required maximum demand.

ETSA Utilities preference is for Padmount transformers and associatedswitchgear to be located outdoors at ground level with direct accessfrom the street. This is the customer s least overall cost option. Refer toNICC-802 - Padmounted T/F Brochure. However, an alternative to theoutdoor option is a distribution transformer room within the customer sbuilding.

6.2 Distribution Transformer Room Location

A distribution transformer room located within a building must take intoconsideration:

Ability for ETSA Utilities to replace major plant (e.g. PadmountTransformer) under emergency conditions,

Impact on the areas adjacent to, above and below the distributiontransformer room,

Future access to the distribution transformer room, Taking into account the surrounding environment, ETSA Utilities 24/7 access requirement, ETSA Utilities exits under emergency situations, The distribution transformer room is placed within the building

complex so that at least two walls which include personnel andequipment doors are adjacent to open areas to provide anemergency escape,

Ventilation and room cooling facilities, Equipment installation methods, and All other ETSA Utilities access requirements have been met.

We strongly recommend that you liaise with the relevant ETSA UtilitiesManager when selecting a site within your development for the

distribution transformer room. Distribution transformer rooms located atground level with direct access and ventilation is ETSA Utilitiespreference for a distribution transformer room.

Alternatively, distribution transformer rooms may be located in thefollowing locations by agreement from the relevant ETSA UtilitiesManager:

Basement level; Upper level - by negotiation at gantry level for temporary HV supply

only.


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Notes:1. Basement distribution transformer rooms are only acceptable if

there is a duct system between associated equipment to enablethe installation of the required ETSA Utilities cables.

2. ETSA Utilities will not accept basement distribution transformer roomswhere they are located at the lowest point of the building or belowthe flood level.

6.3 Distribution Transformer Room SizeFor a single unit distribution transformer room the minimum distributiontransformer room size shall be not less than 6.25m (D) x 4.25m (W) x 4.0m(H) which is based on distribution transformer capacity 2000kVA.

For any distribution transformer sizes less than 2000kVA, this minimumdistribution transformer room size shall be maintained for the futureexpansion and/or upgrades.

Where 3 hour fire rating of the room is achieved then a minimum of1.0m clearance, measured from inside wall(s) of the room to thedistribution transformer and/or equipment, shall be maintained.

Refer to figure 1 Typical Distribution Transformer Room Size .

For installations requiring multiple units (e.g. switch gear and/or additional distribution transformer); the distribution transformer room sizeshall be negotiated with the relevant ETSA Utilities Manager which issubject to supply requirements.

Also, a minimum of 1.0m clearance shall be maintained between each

unit in a multiple unit distribution transformer room.


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7.0 LAND TENUREFormal land tenure (by registration in the Lands Titles Registration Office) mustbe provided to ETSA Utilities for the distribution transformer room, together withrights of access for personnel, related services and where necessary, vehicles.

7.1 Form of TenureGenerally, registered easements (in a form determined by ETSA Utilities)will be adequate but in some circumstances, where the facility haswider implications for the electricity distribution network, tenure byownership may be sought.

In those instances where ownership is deemed necessary, ETSA Utilitieswill negotiate arrangements separate to those set out in this TechnicalStandard.

7.2 Easement Documentation Provisions7.2.1 Exclusively Enclosed Building Area for Housing T/F

The area to be occupied by the distribution transformer willneed to be dedicated as an exclusive use distributiontransformer room, to avoid the risk of injury to third partiesaccessing the site.

The easement documentation will also set out the rights andobligations in relation to the building fabric, including (but notlimited to) doorways and security.

7.2.2 Cables and other Physical Services

This may include (but not be limited to) cables for theconducting of electricity (both high and low voltage),telecommunications, pipes for water and air, fire services,ancillary fixings, infrastructure and works.

7.2.3 Ventilation

As set out in clause 9.6 of this Technical Standard, the facility willrequire adequate ventilation (and possibly external ventilation)and the easement documentation will make provision for this.

7.2.4 Access by Personnel, Equipment and Vehicles

The easement documentation will include (but not be limitedto) formal provision for the movement of personnel on anunrestricted 24/7 basis (and in a way which ensurescompliance with the Building Code).

In addition, the easement documentation must make provisionfor full access for plant and equipment installation,maintenance and practical replacement.

Further, provision will be required for vehicle parking to enableperiodic maintenance and for larger plant e.g. cranes for distribution transformer replacement, and in somecircumstances, temporary installation of rails.


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7.3 Third Party LandIt may be necessary for the electricity distribution network to cross thirdparty land to supply the distribution transformer facility. In this case it willbe necessary to obtain the formal agreement of impacted landownersto also grant easements on terms and conditions acceptable to ETSAUtilities.

It will be the responsibility of the landowner of the proposed distributiontransformer facility land to negotiate this agreement.

7.4 Landowner AgreementThe owner of the land (not a tenant or informal third partyrepresentative) must formally agree to grant an easement on suchterms and conditions as ETSA Utilities considers appropriate andundertake to do all things necessary to obtain registration of theeasement in the Lands Titles Registration Office.

The landowner must also provide a plan delineating the easement anddo all things necessary to enable deposit/acceptance of the plan inthe Lands Titles Registration Office.

7.5 CostsThe owner of the land must agree to pay all reasonable costsassociated with the granting of the easements (including thoserequired over any third party land).

The easement will also require that the landowner meet the costs ofany equipment (including but not limited to cranes and forklifts)required for installation and replacement of the subject electricityinfrastructure due to its location as requested by the landowner, rather than a location deemed by ETSA to be more convenient andaccessible.

8.0 Access RequirementsUnless access to the distribution transformer room is directly from any streetfrontage, the following requirements shall be met by the customer.

8.1 Sloping Ground Conditions

A level area is to be provided in front of the equipment door(s). Accessto the equipment door(s) position is necessary for vehicles. This shouldbe taken into account in determining the distribution transformer roomfloor level.

When requested on the layout drawing, the customer must supply andinstall suitable hand railing and guard rails in accordance with theBuilding Code of Australia.

Where the site is cut into a slope, provision must be made for retentionof the bank and diversion of the surface water from the distributiontransformer room.


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8.2 Personnel Safety and AccessETSA Utilities personnel require unhindered twenty four hour, seven dayper week access to the distribution transformer room and associatedmains at all times from the date of handover. The customer is to provideaccess details such as keys, key codes etc prior to connection of supplyand ETSA Utilities is to be informed should access alter.

Unhindered vehicle access may be required by ETSA Utilities for emergency situations and maintenance purposes. Access points mustbe located where they will not be obstructed by vehicles, equipment,site usage or any other impediments.

Unrestricted access, without notice, by ETSA Utilities personnel to thedistribution transformer room must be available at all times. Therequirement must be included in any immediate or future buildingsecurity arrangements. The imposing of restrictions on ETSA Utilitiespersonnel access such as obtaining of approval or arranging accessthrough the building owner, tenant, building security (off or on site ) or other sources is not acceptable.

A permanent all-weather pedestrian access route at least 1.2m in widthis required to the distribution transformer room entrances. This must beavailable for use by personnel at all times of the day and night 24/7using only the ETSA Utilities master key system as outlined in Clause 4.7of the ETSA Utilities Service & Installation Rules. It is not acceptable for access to be through areas which are hazardous.

The customer must not enter the distribution transformer room unlessaccompanied by an appropriately accredited ETSA Utilities employee.The customer is required to ensure that each distribution transformer room provides personal access from a minimum of 2 independentdoorways which can provide an escape in the event of an emergency.

It is essential that all access ways to the distribution transformer room bekept clear at all times. Storage and car park bays are not acceptablein front of distribution transformer room doors. ETSA Utilities may requiresuitable notices to be erected to this effect. Personnel hatchways andvertical ladders as an access or escape means must not be used.

8.3 Equipment Access

The distribution transformer room requires suitable access to a clear equipment handling area in front of the room. This equipment handlingarea is to be large enough to manoeuvre all required equipment in toand out of the room with a minimum width of 2.6m and length of 2.6m.

The grade of the handling area should not exceed 1:20. A 6.2m turningcircle is required for the mobile crane to navigate around corners. Acarriageway easement of 4.5m (H) x 4.5m (W) is required for theinstallation or removal of the distribution transformer. The width shouldbe increased on bends.

The carriageway must have a maximum slope of 1:12. The carriageway

must be able to withstand the combined weight of the distributiontransformer and crane of 23 tonnes.


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8.3.1 Equipment and Personnel Doors

All doors and frames shall be 3 hours fire rated with approvedunderwriters label and have all the necessary attachments for self closing. Hinges shall be fitted with stainless steel pins.

The locking cylinders will be changed to fit ETSA Utilities keywhen the distribution transformer room is taken over by ETSAUtilities.

The doors are to be opened outwards and indicated on your layout drawings. No air space larger than 15mm is allowedbetween frame and wall, door and frame and door to door.

Any single stage ventilation opening adjacent to any door lock must be fitted with a suitable barrier to prevent unauthorizedopening of the door lock.

External doors shall be waterproof, and in the case of mild steelconstruction, two coats of exterior gloss paint shall be applied.Personnel access doors must be not less than 800mm (W) andEquipment door size shall be 4.0m (H) x 4.0m (W).

8.3.2 Personnel Doors with Stairs

Stairways must be large enough to allow for the passage ofpersonnel and minor equipment. They must be no less than1.2m wide and fitted with appropriate handrails. Headroommust be a minimum of 2.2m.

Stairways and passageways must be provided with lighting.

Access doors should be fitted with micro-switches toautomatically activate the stairway and/or passagewaylighting.

8.3.3 Hatchway Type Entrances

Hatchway type entrances for equipment access used withbasement distribution transformer room designs areacceptable only if two (2) separate personnel access doors, viastairs, external to the distribution transformer room are provided.

They are required to be of a standard design and the

necessary hatch cover and frame assembly must be suppliedand installed by the customer.

The area above the equipment hatchway must not be lessthan 4.0m in height to allow for the use of a crane.

8.3.4 Safety Signs

Safety signs that draw attention to the dangers of unauthorisedaccess to high voltage electrical equipment must be attachedto all doors to the distribution transformer room.

These signs are to be in accordance with the requirements of

AS1319 Safety Signs for the O ccupational Environment .


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8.3.5 Hardware

8.3.5.1 Access Route to the Distribution T/F Room

Where access to the distribution transformer room isnot direct from the street, locked doors or gates on

route to the distribution transformer room shall befitted with either:

A lock with a cylinder keyed to the ETSA UtilitiesMaster Key System.

A padbolt or similar fixing capable of acceptingLockwood series padlocks and keyed to theETSA Utilities Master Key System.

You are responsible for supplying and installingdoors fitted with Australian Locksmiths P1 Deadlatch, incorporating a heavy duty key-n-knob lock with rigid outside knob, key retracting bolt andfree inside lever at all times.

8.4 Hazardous LocationsETSA Utilities distribution transformer room access routes must not bewithin an area which is classified as a Hazardous Area.

8.5 Avoidance of Services and EncroachmentsThe distribution transformer room enclosure must be free ofencroachments into the required floor and trench areas. Columns,

beams, footpads and walls may occupy certain areas specificallyshown on the distribution transformer room plans, providing it does notinterfere with the location of consumer mains, conduits, trenches,ventilation ducts and distribution transformer room equipment.

Please ensure that the location of the distribution transformer roomdoes not allow services such as drains, sewers and piping to passthrough the:

Distribution transformer room space, Access passageways, Ventilation ducts, Distribution transformer room walls, Distribution transformer room floors, Distribution transformer room

ceiling.The space next to all distribution transformer room access doors mustbe kept clear at all times. Customer s equipment such as Mains SwitchBoard (MSB) and Metering Equipment must not be installed within thedistribution transformer room.

8.6 NoiseThe Environmental Protection Authority (EPA), local councils and other authorities have the power to ensure that noise originating from anypremises is not the cause of reasonable complaint.


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The customer is responsible for the design and construction of thedistribution transformer room to ensure that noise does not exceed thelimits defined in Environmental Protection (Noise) Policy 2007 and is nota source of complaint. Furthermore the use of surrounding areas willimpact on the level of noise that is permissible. Noise measurements

shall be as per AS2374.Ventilation fans also are a source of noise and need to be silenced byattenuator attachments and baffles. Fans installed in distributiontransformer rooms must not exceed the db(A) requirements asspecified in the Environmental Protection (Noise) Policy 2007.

The attenuator attachment can protrude substantially within thedistribution transformer room. However, as a result the dimensions of thedistribution transformer room may need to be increased. Size andposition of fans within the distribution transformer room must beacceptable to ETSA Utilities.

9.0 CONSTRUCTION REQUIREMENTSAll construction drawings for distribution transformer rooms are to be designedto comply with the relevant clauses of the Building Code of Australia andrelevant Standards.

9.1 GeneralAll construction materials used in the distribution transformer roomincluding walls, ceilings and floors, doors and vents must beconstructed from non-combustible materials.

Any wall, ceiling or floor shared with or adjoining another part of thebuilding must be treated as a fire wall as defined in the Electrical Safety(Network Asset) Regulations 1999 and Building Code of Australia andmust have a minimum fire rating of 3 hours (180/180/180), effectivelysegregating the distribution transformer room from the rest of thebuilding.

It is essential that these ratings be maintained for any penetration of thewall for cables or other services. The sealing of the penetration must bedone strictly in accordance with the manufacturer s instructions and willbe subject to inspection by ETSA Utilities.

9.2

Foundation RequirementsThe distribution transformer room must be constructed on a stablefoundation which bears on soil or another part of a building. Where thefoundation bears on soil, the soil must be clear of any obstruction or rubble which could interfere with the installation of the earthingelectrode system through the distribution transformer room floor.

All distribution transformers and HV switchgear must have a vault nolower than the building basement with a minimum size of 1.2m deep x0.9m wide x 1.8m long and sleeved appropriately for earthingrequirements OR the customer is to provide a distribution transformer

stand to ETSA Utilities specification. For the site specific footings andvaults requirements, consult/discuss with relevant ETSA Utilities Manager.


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9.3 Drainage and Waterproofing9.3.1 Site Drainage

The site shall be effectively drained to keep the area outsidethe distribution transformer room freely drained and dry.

Stormwater drainage systems shall be designed and providedto industry best-practice standards. Site drainage shall be keptin working order by the customer.

9.3.2 Area Drainage

The area in which the distribution transformer room is to belocated shall be free of the risk of flooding and storm water damage and any drains provided must be kept in workingorder by the owner.

Where there is potential for water ingress, the distributiontransformer Room is to be fitted with a level actuated sumppump/s installed at the lowest point which can be utilised toachieve suitable drainage or the removal of oil, in accordancewith EPA standards.

9.3.3 Water Tightness

The enclosure housing the distribution transformer roomequipment has to be watertight to protect all equipment withinthe distribution transformer room which may be subject to risk ofdamage from exposure to water or dampness.

ETSA Utilities will not accept handover of the enclosure or install

equipment if there is water or water leakage within thedistribution transformer room or the potential for this.

9.3.4 Methods

Industry best practice construction methods shall be used at alltimes to ensure the distribution transformer room is waterproof.

9.4 Walls and CeilingsThe distribution transformer room walls shall have sufficient structuralstrength to support the weight of any equipment mounted on it withoutcollapsing. For the installation of a wall mounted hauling eye refer to

clause 9.9.The ceiling shall be constructed of a suitable material that providessufficient structural strength for the mounting of hauling eyes. Allmaterials used shall meet the appropriate Australian standards.

9.5 FloorsThe distribution transformer room floor, including trenches, conduits, etc,is to be formed in accordance with the positions and details shown onETSA Utilities drawings and specifications.


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The floor shall be designed in accordance with the relevant AS/NZSstandards by a practicing structural engineer and be capable ofcarrying both the static and working loads of the distributiontransformer room equipment with an additional safety factor for futureadditional equipment and replacement equipment that may be

heavier.In addition, the floor must have a level non-slip finish. Refer to clause 9.9on the specific requirements for the floor mounted hauling eyes.

A distribution transformer landing area is to be provided in all cases. Thedistribution transformer loading area is to be constructed of reinforcedconcrete and must have the same load bearing characteristics as thedistribution transformer room floor. The equipment handling area isspecified in clause 7.3 and will be located immediately in front of thedistribution transformer access door/s.

The landing area must be at the same relative level as the distributiontransformer room floor to allow equipment to be rolled into thedistribution transformer room directly from the landing area.

9.6 VentilationDistribution transformer rooms require special attention to ventilation inorder to dissipate heat losses from electrical equipment. Wherever possible, natural air flow to the outside of the building will be used.

Forced ventilation should be used where natural ventilation is notpracticable. Forced ventilation by means of fan(s) must be designed,supplied and installed by the customer to ETSA Utilities requirements.

In either case, the ventilation must be sufficient to maintain a maximumtemperature rise of 15 degrees Celsius above the external ambienttemperature when all distribution transformers are operating atnameplate rating. Air inlets and outlets must be arranged to achievean even distribution of air flow over the distribution transformers.

Substantial vertical separation is required between inlet and outletopenings. Inlet and outlet openings should preferably be clear ofpedestrian areas and must be located to prevent entry of noxiousgases such as vehicle exhausts, fuel exhausts, refrigeration plant gasdischarge valves, pollutants such as smoke, soot, dust, ash etc.

Air being removed from an internal distribution transformer room mustbe directly and independently ducted to outside air. A fire damper isrequired to be installed in each duct-opening in a basementdistribution transformer room to close off air supply in the event of a fire.It must have a fire rating of three hours (180/180/180).

In special circumstances, the customer may be required to install anexhaust fan with integral fire damper as part of the building work.Exhaust air from the distribution transformer room shall be ductedindependently and directly to outside air.

Note: As a guide heat losses are taken as 25kW per distribution

transformer.


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9.6.1 Natural Ventilation

This type of ventilation is suitable for distribution transformer room capacity up to 1000kVA. The position of the vents must bedirectly to outside air, if this is not achievable, such as in thecase of a basement type distribution transformer room, thenforced ventilation is required.

The design calls for the customer to provide vermin proof,weather proof louvered vents of a specified design in the wallsin order to achieve natural ventilation. Vents on personnel andequipment doors are not acceptable. These areas outside thelouvers must not be subjected to fire risk.

In some cases, where the roof of the distribution transformer room is external, weatherproof roof ventilators may also bespecified. It is important where roof vents are installed that theyare fixed securely to the rod purloins. All vents are to be fittedwith fire shutters.

9.6.2 Forced Ventilation

Ventilation system comprising fans, ducting and inlet\outletvents must be designed, supplied and installed by thecustomer.

The air flow through the ventilation will be checked by ETSAUtilities before final approval. The control devices and wiring for the starting and stopping of the fan(s) will be supplied andinstalled by the Customer.

It is ETSA Utilities requirement that the forced ventilation systembe designed so that the cool inlet air is drawn through thecirculation fan and then blown over the distributiontransformers.

In all circumstances the fans must be installed inside thedistribution transformer room and all wiring contained within thedistribution transformer room. The outlet ventilation shall bedischarged independently and directly to open air.

All vents are to be fitted with fire shutters. Fans installed indistribution transformer rooms must not exceed the db (A)

requirements as specified in the Environmental Protection(Noise) Policy 2007.

9.6.3 Distribution T/F Space & Ventilation Requirements

Distribution transformer rooms must provide sufficient space andventilation to accommodate 2000kVA distribution transformers,ensuring sufficient ventilation are provided for future loads,even through smaller units may be initially installed.

Distribution transformers must be separated from walls,ventilation equipment and other obstructions by a minimum of1.0m. Distribution transformers must not be directly placedunder ventilation duct openings.


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With the exception of fire damper trip wires, if required, no itemof equipment or installation or obstruction is to be placed over a designated distribution transformer space.

9.6.4 Special Requirements for Ventilation Ducts

Distribution transformer room ventilation ducts must not containother services, give access to other portions of the building or form part of the ventilation system for the building.

The strength and fire rating of the walls of ventilation ducts arerequired to be the same as those specified for the distributiontransformer room walls where fire dampers are not installed.

Normal air conditioning duct construction is acceptable onlywhere fire dampers are installed on wall penetrations whereventilation ducts enter or leave the distribution transformer room.

9.7 FireETSA Utilities distribution transformer rooms are designed to contain anyproducts of a fire within the enclosure. Self containment has the addedadvantage of also being self smothering and this ensures that there isno spread of fire to other parts of the building.

You must ensure all walls, floors, ceilings and doors are 3-hour fire rated(180/180/180). The customer will be responsible for providing these fireratings at his cost.

9.7.1 Fire Detection and Alarm Settings

(a) The customer is responsible for the installation and ongoingmaintenance of a compliant fire detection system whichmust be installed and tested prior to commissioning of ETSAUtilities equipment.

(b) The installation of such systems must ensure that the 3 hour fire rating (180/180/180) of the distribution transformer roomis not compromised.

(c) The testing and maintenance of the fire detection systemwill require a Request for Network Access (i.e. RNA) permit.For RNA procedure, refer to ETSA Utilities website .

9.7.2 Fire Fighting Systems

ETSA Utilities will not permit the installation of any type of firefighting systems within the distribution transformer room.

9.7.3 Fire Segregations

Where a distribution transformer room is located within abuilding, a 3 hour fire rated (180/180/180) enclosure and a firerating level in accordance with the Building Code of Australiamust be provided.
http://www.etsautilities.com.au/centric/contractors_and_designers/request_for_network_access.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/request_for_network_access.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/request_for_network_access.jsphttp://www.etsautilities.com.au/centric/contractors_and_designers/request_for_network_access.jsp


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9.8 Cable Supports9.8.1 General

All electrical conduits and cable enclosures, between thedistribution transformer room and the property boundary shall

be provide by the customer as specified on the layout drawingsto enable ETSA Utilities to install HV and LV cables to thedistribution transformer room.

The location of the distribution transformer room should be suchthat the length of conduits or other cable enclosures is as shortas possible. Conduits and other cable enclosures should run in ahorizontal straight line from the distribution transformer room tothe property boundary.

Where the distribution transformer room cannot be located atstreet level or there are obstructions on the customer s property

which necessitate bends in the cable run the details of thesebends shall be discussed with and approved by ETSA UtilitiesManager.

Any conduit bends shall have a minimum radius of 1.8m.ETSA Utilities will specify the number, size, type and location ofconduits, pits, cable trays etc. to be installed on the customer sproperty.

All conduits are to be installed free of obstructions or anymaterial that may hinder or damage the cable during thecable pull.

9.8.2 Approved Supports and EnclosuresThe following are ETSA Utilities approved methods of supportingor enclosing HV or LV cables to a distribution transformer rooms.

9.8.2.1 Buried Conduit:

The approved conduits, conduit bends sizes, stock item numbers, installation arrangements,requirements, including minimum cover andseparations to other services are detailed in ETSAUtilities TS-085: Trenching and Conduit for

Underground Distribution Cable Netwo rks. 9.8.2.2 Supported/Enclosed Conduit

(Basement Car Park)There are various acceptable methods of encasingconduits through buildings on route to the distributiontransformer room from the property boundary.Consult with the relevant ETSA Utilities project officer for agreed method.

Conduits must be securely fixed to preventmovement when cable hauling forces are applied,and to support the weight of the cables.


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Furthermore, the installation must comply with therelevant fire protection regulations where required.Where HV cable easements are accessible to thepublic the conduits must be labelled with ETSAUtilities Cables in permanent black lettering every

4.0m along their length.9.9 Hauling Eyes

Where required, anchors and/or hauling eyes (provided by the owner)are to be installed in the floor, walls or ceiling in the position shown onthe project specific layout drawings and in a manner to achieve theworking load specified.

The location and number of hauling eyes shall be negotiated with therelevant ETSA Utilities project officer.

All anchors and hauling eyes shall be clearly and permanently stamped

to indicate its safe working load. Hauling eyes located in floors shall beremovable and, upon removal, the floor surface shall be level to avoida tripping hazard. Threaded recesses shall be provided with reusableremovable plugs to exclude ingress of foreign matter.

Normal hauling eye requirements are as follows:

9.9.1 For Cables & Distribution Transformers

A single hauling eye cast into the floor of the distributiontransformer room shall be provided at the location shown onthe project specific layout drawings. The hauling eye must havea minimum working load of 100 kN (i.e. 10 Tons) with a 50 kN(i.e. 5 Tons) load applied in any direction and a minimum eyebolt hole diameter of 40mm.

Hauling eyes may also be specified for intermediate cable pitsoutside the distribution transformer room where these arerequired on the owner s property.

9.10 Oil ContainmentProvision must be made within the distribution transformer room tocontain any oil spillage (in the unlikely event of a distribution transformer tank failure) and slope to a common point.

Spillage from distribution transformers needs to be contained within thedistribution transformer room and be 110% of oil volume as per theAS1940 and EPA Bunding Guidelines. Bunding requirements may berelaxed should a 100% self oil contained distribution transformers beutilised.

9.11 Additional RequirementsAdditional requirements are as follows:

Protection of vulnerable portions of the customer s premises fromdamage which may occur in the event of failure of an oil-filled

distribution transformer.


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This means that the walls, ceilings and any ventilation ducts musthave an adequate degree of strength and, where they are themeans of separation from the interior of a building, a fire-rating of atleast 3 hours.

The use of a spray on material to achieve fire rating will not bepermitted within the distribution transformer room.

Protection of distribution transformer room equipment and mainsfrom fire and water sources originating outside the distributiontransformer room.

High reliability in the precautions taken to ensure dry wall and floor conditions.

Oil Containment as per the EPA Guidelines and AS1940. High reliability in the drainage precautions. Suitability of the floor to support heavy equipment and of walls and

ceilings to support equipment requiring heavy-duty fixings. Suitability of the floor, walls, ceiling and roof materials, joints andconstruction methods to provide a reliable watertight construction.

Suitable proofing of the distribution transformer room against theentry of vermin and vandals and unauthorized personnel.

Prevention against the entry of fumes and other gases in basementdistribution transformer rooms.

10.0 PROVISION OF PERMANENT SUPPLYPermanent supply to the customer will only be supplied when a Compliance

Form Checklist has been signed by Compliance Co-ordinator.10.1 Incoming High Voltage Supply

The incoming high voltage supply between ETSA Utilities high voltagedistribution system and the distribution transformer room shall be viaunderground cables.

The customer will be required to install conduits or duct system from theproperty boundary to the distribution transformer room to allow ETSAUtilities to install its cables. The easement width required for the cables isnormally 4.0m.

No structures may be erected or levels altered within the easementwithout written permission of the relevant ETSA Utilities Manager.

10.2 ApprovalThe design of the conduit route and formation is to be included on thebuilding construction drawing and is to be approved by ETSA Utilitiesbefore construction commences.

Any subsequent alteration to design during construction must beapproved by the relevant ETSA Utilities Manager. When installation ofthe conduits is complete, the customer shall arrange inspection by ETSAUtilities, prior to backfilling or concrete pour.


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10.3 InstallationsAll conduits are to be installed as per relevant ETSA Utilities TechnicalStandard but specific designs need to be undertaken in conjunctionwith the ETSA Utilities Manager.

ETSA Utilities will inspect conduit location and installation beforebackfilling.

10.4 InspectionsYou must ensure the High Voltage switch room is completed to ETSAUtilities standards and specifications prior to arranging an ElectricalCompliance Inspection.

OR

You must arrange for Electrical Compliance Inspection following thecompletion of your works that are related to the provision of new high

voltage equipment on site.

11.0 AGREEMENTS, APPROVALS AND CONSTRUCTIONOn receipt of drawings of the distribution transformer room ETSA Utilities willadvise the customer s representative that the building details, location andaccess requirements are satisfactory, and that the customer can proceed withthe construction of the distribution transformer room.

This advice will be given on the understanding that it does not commit ETSAUtilities in any way.

11.1 Safety and ClearancesDistribution transformer room equipment shall be located with dueregard of safety or personnel working in the distribution transformer room.

A clear passageway at least 1.0m wide shall be allowed from eachitem of switchgear to the personnel access doors to the distributiontransformer room.

A clearance of at least 3.0m out from the front of the high voltage andlow voltage switchgear shall be allowed for safe operations.

Equipment shall be located such that any item of equipment may beremoved from the distribution transformer room with the remainingequipment in service and under load.

A passageway of at least 4.5m wide shall be allowed for distributiontransformers.

The distribution transformers shall be sited with a clearance of 1.0maway from walls, other distribution transformers and switchgear in order to allow free air flow.


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11.2 Earthing RequirementsThe building/land owner is responsible for all ETSA Utilities projectspecification and all National and State code requirements in relationto earthing of all equipment.

ETSA Utilities will nominate the appropriate earthing scheme to beemployed at specific location e.g. CMEN or MEN.

All earthing within the installation shall meet all the requirements of therelevant AS/NZS standards.

If modelled conditions prescribed in these relevant standards cannotbe met then a detailed earthing design shall be required andsubmitted to the relevant ETSA Utilities Manager for assessment.

The customer is to be advised that a regular earthing test programneeds to be in place for the ongoing compliance of the earthingsystem as per the relevant AS/NZS standards.

The (HV) fault levels shall be considered as 25kA minimum.

For any conduits and cabling within the room provided for ETSA Utilitiesinfrastructure AS C onstructed drawings are to be provided.

11.3 Standard DesignsThe customer must provide drawings of the proposed site, plannedconduit route through the property and distribution transformer roomlocation.

Along with a floor plan, relevant sections through the distribution

transformer room showing all levels, beams, columns, footpads and anyother structures within or outside the distribution transformer room shallbe shown.

Ventilation details that are submitted must show site and location of allvents, ducts and fans.

The customer s representative is required to prepare for the builder sguidance a building construction drawing and provide three (3) copiesof this drawing to ETSA Utilities representative for reference beforeconstruction of the distribution transformer room begins.

The approved For Construction drawing is to show:

The location of the distribution transformer room in relation toadjoining construction and to the street. If not on the streetalignment, this should include the access route, type of roadsurface, relative levels of the roadway and any overheadobstruction and details of levels external to the distributiontransformer room.

Drainage arrangements in the vicinity of the distribution transformer room.

The location of the customer s main switch room and the route of

the cables, busbars or bus way from the point of supply to the mainswitchboard.


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Details of cable pits and conduits provided by the customer toenable ETSA Utilities to install HV and LV cables between thedistribution transformer room and the property boundary.

Any variation from ETSA Utilities distribution transformer roomspecification. These must be either alternative forms of buildingconstruction or specifically-negotiated modifications approved byETSA Utilities Manager.

The permanent means of access for ETSA Utilities personnel andequipment.

11.4 Inspections

The builder will undertake regular dialogue with the relevantETSA Utilities Manager during the construction phase with on-sitemeetings undertaken at critical milestones of the project.

For Example:At the Pre-Construction Stage:

o Setting up of conduit installationAt the Pre-Connecting Stage:

o The ETSA Utilities Manager will utilise the services of aCompliance Officer as required.

On receipt of 2 weeks notice, ETSA Utilities Compliance Co-ordinator inconjunction with the ETSA Utilities Manager can audit the set out ofconduits, cable trenches, cable trays and pits etc. before backfilling or concreting is commenced.

Notes:

1. It is the responsibility of the builder to contact ETSA Utilities to makearrangements for this inspection.

2. It is ETSA Utilities relevant Manager s responsibility to communicatewith the ETSA Connect Officer at various milestones throughoutproject.

11.5 Certificates of Compliance - Construction

Prior to energisation and hand-over of the distribution transformer roomto ETSA Utilities, the customer must provide the following supportingdocumentation for:

Load bearing floors and walls; 3 hrs fire rating of distribution transformer room; and Compliance to all relevant Australian Standards and Building Code

of Australia; and Other documentation as required.

Refer to TS 105-F-40, FORM 40: The Construction Check Sheet for ETSA Utilities For Indoor Distribution Equipment and Transformer Room

which are interactive forms and are available from the ETSA Utilitieswebsites:


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Intranet Website:TS105 Test Standard Appendix A Forms

Internet Website:TS105 Test Standard Appendix A Forms

11.6 Lighting and Power within T/F Room Enclosure11.6.1 Temporary (During Construction Stage)

Prior to handover of the distribution transformer room enclosure,the enclosure shall contain suitable temporary lights and power supplied from the customer s installation to allow the safeinstallation of distribution transformer room equipment.

11.6.2 Permanent

The customer will supply and install within the distributiontransformer room necessary light fittings including power outlets

and all wiring as per the Building Code of Australia.Where required, equipment such as exhaust fans, pumps, andcontrols will be provided and installed by the customer inaccordance with this specification.

The customer will undertake the wiring to these units. All wiringspecified above shall be undertaken in accordance withrelevant Australian Standards.

12.0 Maintenance/Repair of the Dist. T/F RoomThe Landowner is responsible for the maintenance and repair of the DistributionTransformer room and its contents (other than the distribution equipment whichis ETSA Utilities responsibility).

In the event of damage or a maintenance concern to the DistributionTransformer room which renders the Distribution Transformer room unsafe, theLandowner must take immediate action at its cost to ensure the safety concernis remedied.

If the Landowner fails to act ETSA Utilities retains the right to effect repairs andthe value of the repairs shall be a debt due from the Landowner to ETSA Utilities.
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