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Top 10 Most Popular FAQs
I intend to rewire my flat/house. Do I need to test the rewiring thereafter?
You will need to engage a Licensed Electrical Worker (LEWs) to carry out the electrical work such as rewiring, modification, addition, alteration, repair or replacement work in your flat.
Following the completion of the rewiring, modification, addition, alteration, repair or replacement work, the installation has to be tested before it can be connected to the electricity supply. Consumers have two options.
You may request your appointed LEW to inspect and test the re-wired electrical installation. The LEW will have to submit to SP Services Ltd (SP) a Completion Certificate for Modification of Electrical Installation showing the test results and give a copy of this certificate to you.
Thereafter, the LEW can connect the electrical installation to the electricity supply. Based on the completion certificates submitted by the LEWs, SP may randomly identify selected residential premises to conduct spot checks on the completed electrical installations.
Alternatively, you can request your appointed LEW to apply on your behalf to have your electrical installation tested by SP. Your LEW will have to arrange for an appointment with SP to conduct an electrical test of the installation at your premises.
Either a family member or yourself is required to be present during SP's testing. After the test, SP will issue an Electrical Installation Inspection Report to yourself and your appointed LEW on the test results. The LEW can then connect the electrical installation to the electricity supply if the test results are positive.
SP does not charge a fee for the first test. However, if the electrical installation fails the test, a re-test fee of $53.50 is chargeable by SP. Depending on the service agreement between the LEW and you, the LEW may charge a fee for the services rendered in arranging for the test by SP.
Whom should I engage if I want to rewire my house?
Consumers should engage Licensed Electrical Workers (LEWs) to install or supervise the installation of electrical wiring (including new electrical wiring, or addition or alteration to existing electrical wiring) in their premises. See the list of
How can I ensure my household's electrical installation (will people be confused with elec installation licence?) is done properly?
You can do so by only engaging Licensed Electrical Workers (LEWs) to carry out the electrical work (e.g. rewiring, repairing or replacement of any part of electrical installation, inspection, testing, etc.). See the list of
I intend to rewire my flat/house. Will I be given a copy of the single-line drawing by the LEW I've engaged?
As a consumer, you can request for a copy of the single-line drawing from your LEW.
The single-line drawing will help you to identify the circuit breakers that control the circuits of switches, switch socket-outlets, electric water heater, etc. within your premises.
The LEW will prepare the updated single-line drawing and will usually display it on the inner cover of the distribution board.
Before electrical installation, does the Licensed Electrical Worker (LEW) need to submit the design of the consumer's electrical installation to SP PowerGrid Ltd for approval of the installations?
The LEW is fully responsible for his design and installation work for the consumers' electrical installations. He does not need to submit his design of the consumer's electrical installation to SP PowerGrid Ltd for approval.
However, he has to ensure that the consumer's electrical installation meets the connection requirements stipulated by SP PowerGrid.
What must the landlord's LEW do with regard to turn-on of electricity supply to the tenant's licensed electrical installation?
The tenant's Licensed Electrical Worker (LEW) shall submit the 'Certificate of Compliance' to the landlord's LEW to request for turn-on of supply to the tenant's electrical installation.
The landlord's LEW shall ensure that the connection requirements stipulated by him on behalf of the landlord have been complied with before he proceeds to turn-on the supply line.
Immediately after this, the landlord's LEW shall issue a statement and obtain the acknowledgement of the tenant's LEW. He is in charge of the installation and the operation of the tenant's electrical installation, and the tenant or his representative.
Can a Licensed Electrical Worker (LEW) engaged by the landlord of a multi-tenanted building also oversee the design, installation and operation of a tenant's electrical installation?
Yes, the tenants may engage the landlord's LEW to oversee their respective electrical installations.
When was the Cable Color Code for fixed wiring amended and what were the changes?
A new colour code for fixed wiring took effect on 1 Mar 2009. It adopts the European Union's standard whereby the cable color for the live phase are in brown, black and grey compared to the previous red, yellow and blue.
Do high voltage cables need to be marked according to the amended cable colour code?
Yes. To avoid confusion, the new colour markings, i.e. L1, L2 and L3 shall be provided at the switchgear or cable compartment where new cables are terminated to differentiate the three line cables.
Were the power cables of electrical appliances affected by the change in the cable colour code?
No, the change in cable colour code does not apply to flexible power cords for electrical appliances.
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