Electrical contractors

Learn your responsibilities and download key documents such as our Supply Rules and meter installation guide.

Your responsibilities

As a Registered Electrical Contractor, you are responsible for:

Observing our Supply Rules;
Referencing the relevant key documents;
Attending electrical installation inspections; and
Issuing a Work Completion Certificate (WR1) for electrical installation.

Key documents

Our Supply Rules (PDF), which will be updated from time to time, state the terms and conditions for supplying electricity and shall be applicable to all our customers.

Download our “Guide To Supply And Metering Arrangement On Customer’s Internal Distribution System” (Version 9 - Sep 2018) (PDF) which lists the supply and metering requirements of a customer’s internal electrical distribution system. It is a key reference for architects, electrical engineers and Registered Electrical Contractors.

Its contents include:

Technical requirements of Main Incoming Circuit Breaker (MICB)
Dimensional requirements and the provision of communication means of metering equipment
Interfacing requirements for New Cable Colour Code
Requirements of meter room key

Guide to Supply and Metering Arrangement on Customer’s Internal Distribution System (Version 8 - Aug 2017) (PDF)

Supporting documents

Depending on the works you plan to carry out, you may refer to the following documents together with our meter installation guide:

Improvement works (under Fire Safety Ordinance)

Typical Details for Improvement Works to Electrical Cable, Meters & etc. under the Fire Safety (Commercial Premises) Ordinance or Fire Safety (Buildings) Ordinance (PDF)

Nov 2016

Infrastructure works for smart meter

Requirements of Power Supply Facilities for Smart Meter Communication Equipment in Buildings (PDF)

Sep 2018

Metering design for Feed-in Tariff Scheme

Feed-In Tariff Scheme Standard Metering Requirement (PDF)

Apr 2018

Our Code of Practice (COP) states the general principles we apply to our distribution substations’ design. This COP covers substations located at ground floor, upper floor (e.g. high rise building), basement and outdoor areas.

Supporting documents

COP 101 version 15 document (text) (PDF)

Jun 2020

COP 101 version 15 drawings (PDF)

Jun 2020

COP 101 version 15 summary of change (PDF)

Jun 2020

COP 101 version 15 addendum 2021 (PDF)

Dec 2021

COP 101 version 14 document (text) (PDF)

Jun 2017

COP 101 version 14 drawings (PDF)

Jun 2017

COP 101 version 14 - Update No.1/2018 - Additional Requirement of Fall Protection System (PDF)

Aug 2018

COP 101 version 14 - Update No. 2/2018 - Revision of COP101 drawings (PDF)

Dec 2018

COP 101 version 14 – Update No. 3/2019 – Fall Restraint System and Anti-Flooding Requirement (PDF)

Jan 2019

COP 101 version 14 - Update No. 4/2019 - New and Revised COP101 Drawings (PDF)

Dec 2019

COP 101 version 13 document (text) (PDF)

Jun 2014

COP 101 version 13 drawings (PDF)

Jun 2014

Supplementary drawings – detailed design of floodgate (PDF)

Sep 2015

Note:

For development which requires high supply capacity, you are required to provide a 132kV transmission plant room inside your premises for housing our 132kV supply plant and equipment. Download typical 132kV transmission plant rooms layout for high load density development (PDF).

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Electrical contractors

Your responsibilities

Key documents

Supply Rules

Meter installation guide

Past version

Supporting documents

COP 101 Distribution Substation Design

Supporting documents

Past versions