Services

TNB electricity supply applications — new & additional

We handle the full TNB supply application for new premises, renovations, added load and single-to-three-phase upgrades — load calculation, single-line diagram, wiring certificate, forms, TNB liaison, metering, and testing to handover. One contractor, start to finish.

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Scope

What we handle

Application & documentation

Prepared and submitted for you

Load calculation & maximum demand assessment
Single-line diagram (SLD) & wiring layout
Wiring certificate (registered contractor)
New supply, additional supply & load-upgrade forms
Liaison with TNB throughout the process

Metering & connection

Coordinated with TNB

Meter position & type coordination
Single-phase & three-phase metering
CT metering for larger loads, where applicable
Supply turn-on arrangement

Testing & handover

Documented and signed off

Full test sequence — continuity, insulation resistance, polarity, earth loop, RCD
Commissioning of the installation
Certificate of completion & handover documents
Labelled distribution board & test results

Who it’s for

When you need a supply application

New shoplot or unit

First TNB supply for a brand-new commercial or industrial unit.

Factory or workshop

New supply or an upgrade for machinery, compressors and 3-phase equipment.

Renovation & added load

More points, kitchens, air-conditioning or equipment beyond the current supply.

1-phase to 3-phase

Upgrading an existing single-phase supply to three phase.

How we work

From load calculation to supply turn-on.

STEP 1

Site visit & load calc

We assess the premises, take the connected and future load, and confirm whether it’s a new, additional or upgrade application.

STEP 2

Quote & scope

An itemised quote covering the wiring work, documentation and the TNB application.

STEP 3

Installation

Wiring and DB work to MS IEC 60364, ready for inspection.

STEP 4

Submission & metering

We submit the wiring certificate, SLD and forms to TNB and coordinate the meter.

STEP 5

Test, commission & hand over

Full test sequence, supply turn-on, and completion documents for your records.

Paperwork

Documents involved

We prepare the technical documents — the single-line diagram, wiring certificate, test results and application forms. You provide the premises-side paperwork:

Proof of premises ownership or tenancy
Approved building or renovation plan, where applicable
Business registration (for a commercial or industrial account)
Existing TNB bill or account number, for an upgrade
A list of major equipment and its ratings
Authorised person’s identification

FAQ

Frequently asked questions

Do I need a registered contractor to apply for TNB supply?

Yes. TNB requires the wiring certificate and application forms to be submitted by an electrical contractor registered with Suruhanjaya Tenaga, with a competent wireman. We handle the submission end to end.

What’s the difference between a new supply and an additional supply application?

A new supply is for a premises with no existing TNB account — a new shoplot or a new factory unit. An additional or upgrade supply increases the approved load, or changes single phase to three phase, for an existing account. The documents and process differ; we advise which applies after a site visit.

How long does a TNB supply application take?

It depends on the load, whether it’s single or three phase, and whether TNB needs to do external work such as a new cable or transformer. We give a realistic timeline after reviewing your load and location, and we start the process as soon as the quote is accepted.

Can you handle the wiring and the TNB application together?

Yes — that’s the point of using one contractor. We do the installation to MS IEC 60364, produce the single-line diagram and wiring certificate, submit to TNB, coordinate metering, and complete the testing and handover forms.

We’re adding machinery and might exceed our current supply. What do we do?

Start with a load calculation. If the connected load will exceed your approved maximum demand, you’ll need an additional supply application, and often a move to three phase. We calculate it first and only apply for what the numbers require.

Ask us about your TNB application

Fill in the short form — we open WhatsApp with your details prefilled. Or WhatsApp / call us directly.

New premises or adding load? Talk to us.

Free site visit & load calculation · registered contractor · one point of contact.