The lights work, but where is the paperwork? The two certificates a rewiring job should produce in Malaysia, who signs them, and how to read them.
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After a rewiring job in Malaysia, ask for two signed forms: the Supervision and Completion Certificate (Form G) and the Test Certificate (Form H) under the Electricity Regulations 1994. Form G is signed by the wireman who supervised the work; Form H by the wireman authorised to test it, with the test results attached. Check that the names, competency numbers, dates and description match your job, and keep both with your house papers. For the rest of the renovation, see renovation inspection.
Owners often ask for "the wiring certificate" as if there were one document. Under the Electricity Regulations 1994 there are two, and they answer different questions. The Supervision and Completion Certificate says who was responsible for supervising the work and that it was completed in accordance with the Regulations. The Test Certificate says who tested the finished installation, records the test results, and states that the installation is ready and safe to receive electricity.
Regulation 14 names them Forms G and H, set out in the First Schedule. Both forms let the signatory tick whether the job is a new installation, an addition, or an alteration to an existing installation, so a partial rewire or a batch of new points has a box of its own, not only a whole-house job.
Regulation 11 deals with the start of the job. It says no wiring or rewiring of an installation, or extension to an existing one, may be carried out by an electrical contractor without first getting written approval from the licensee or supply authority, which for most homes in Peninsular Malaysia means the electricity utility. There is a proviso: no approval is needed for an extension to existing domestic wiring where the total current consumed after the extension stays within the maximum demand agreed in your supply contract.
Whether your job falls inside that proviso is a technical question for the contractor doing it. Ask them before work starts whether an approval is needed, and if it is, ask for a copy. It is far easier to settle this at the quotation stage than when a new air-conditioner circuit or a cooker point is already in.
Regulation 12 requires wiring in a single-phase installation to be under the immediate supervision of a wireman with a single-phase or three-phase restriction, and three-phase low-voltage wiring to be supervised by a wireman with a three-phase restriction. When the installation is complete, that wireman certifies the Supervision and Completion Certificate. The same regulation says the wireman is to be employed full-time by an electrical contractor or a private wiring unit, which is why the form has a line for the firm the signatory acts for.
Form G is addressed to the owner or management of the installation, describes the installation, lists the drawings it covers and carries the wireman's name, type and number of Certificate of Competency, signature and date. Its notes also say the signatory's liability is limited to the work described, so a vague description protects you less than a specific one.
Regulation 13 says that on completion of wiring or rewiring, the installation is tested by a wireman authorised to test, who certifies a Test Certificate. For installations above low voltage, the test is by an Electrical Services Engineer instead, which rarely applies to a house.
Form H follows the same layout as Form G and adds a schedule of test results. The signatory certifies that, to the best of their knowledge and belief, the installation complies with the Regulations and is ready and safe to receive energy. If the copy you are given has an empty results section, ask why; a test certificate without results is only half a document.
The Regulations tie each signature to a type of competency and supply. Read the form against this:
| Your supply | Who supervises and signs Form G | Who tests and signs Form H |
|---|---|---|
| Single phase (most condos and many terraces) | Wireman with single-phase or three-phase restriction | Wireman with single-phase or three-phase restriction, authorised to test |
| Three phase, low voltage (many larger landed homes) | Wireman with three-phase restriction | Wireman with three-phase restriction, authorised to test |
| Above low voltage | Not a typical home installation | Electrical Services Engineer |
Not sure which supply you have? Your electricity bill or the label on the main board may say, and the contractor should know before quoting. A wireman's grade is printed on their competency card; the guide to hiring an electrician explains how to read it.
You do not need to understand the test values to check that the paperwork is complete. Go through each field:
| Field on the form | What to check |
|---|---|
| Owner and address | Your name, or the management's, and the correct unit address |
| New installation, addition or alteration | The box matches what was done, such as a full rewire or new points |
| Signatory's name | Printed in block letters and the same person on the card you were shown |
| Certificate of Competency type and number | Present, legible and the right type for your supply |
| For and on behalf of | The firm named in your quotation, or its electrical subcontractor |
| Schedule of drawings | Lists the drawings or circuits the work covered |
| Schedule of test results (Form H) | Filled in, not blank |
| Signature and date | Both present; the date is after the work was finished |
Keep a copy of the competency card with the forms if the contractor lets you photograph it. If the job added circuits to an older board, also ask for the board to be labelled, as the wiring colour code guide suggests.
Regulation 14(2) says an installation, other than those covered by the proviso in regulation 11, may not be given electricity by the licensee until both certificates have been submitted by the owner or management. The notes on the forms repeat this: the owner submits Forms G and H to receive supply. So the forms are not a courtesy; they are part of the legal route to getting power to new or reworked installations.
Beyond that, keep them because others may ask what was done: a buyer's lawyer, a future tenant, an insurer after a fire, or the next contractor who opens your board. Ask each of them what they need rather than assuming. File the forms with the rest of your renovation papers, as the renovation handover documents checklist describes.
A certificate is the contractor's statement. You can still look for the obvious, without touching anything behind a cover:
If any of these fail, stop using the affected circuit and tell the contractor in writing. A hands-on checklist for the stage before ceilings close is in the guide to checking electrical rough-in before the ceiling, and a fuller look at an existing installation is in the home electrical safety inspection guide. Any repair or change to the electrical installation must be done by an electrical contractor registered with Suruhanjaya Tenaga.
Sometimes the main contractor subcontracted the electrical work and says the paperwork is "with the electrician". Ask in writing for both forms by a date, and hold back a fair share of the final payment until they arrive. If the person who did the work turns out to hold no competency certificate, or the firm cannot say who signed, the work may need to be checked and certified by someone who is entitled to. Any repair or change to the electrical installation must be done by an electrical contractor registered with Suruhanjaya Tenaga. Complaints about electrical contractors can be raised with Suruhanjaya Tenaga; check its website for the current channel.
For homeowners in KL, Selangor and Putrajaya we offer a third-party inspection of your contractor's work; if you want, we can also quote the repairs. We walk the finishes, carpentry, wet areas and the rest of the works against your quotation, drawings and materials list, room by room, and we go through what we found with you. The electrical installation itself, and its forms, stay with the electrical contractor who did the job.
This page is general guidance, not legal or electrical advice. Regulations are amended from time to time; check the current version with Suruhanjaya Tenaga.
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