TNB Contractor List: Find a Licensed 3-Phase Electrician

Key Takeaways:
TNB's own official contractor list is public and searchable at mytnb.com.my, and every electrician on it is registered with Suruhanjaya Tenaga, the only credential that legally qualifies someone to handle your 3-phase conversion. Expect around RM3,000 to RM5,000 for a licensed contractor's rewiring and TNB liaison work, and always get your quotation in writing before signing.

Search Google for "TNB contractor" and you'll get marketplace listings and Lowyat forum threads recommending whoever the last person happened to use. What most poeple don't know: TNB publishes its own official contractor registry, most homeowners just never find it.

Being on that list only means a contractor is legally allowed to do the work. It doesn't mean they're good at it, fast, or fairly priced. Here's how to access TNB's official contractor registry, what separates a solid contractor from a risky one, and what you should actually expect to pay for a 3-phase upgrade in Malaysia.

How to Search TNB's Official Contractor List

Using myTNB's Contractor Search Tool

TNB's official contractor search tool lets you look up any electrical contractor registered with Suruhanjaya Tenaga (ST), the Energy Commission that licenses electrical work in Malaysia. Search by contractor name or registration number to confirm they're legitimate before you let anyone touch your wiring or submit paperwork on your behalf.

This matters because TNB requires load upgrades up to 100A, the amperage rating that determines how much electrical load your home can safely draw, to go through a contractor registered with the Energy Commission. An unregistered contractor can get your entire application rejected, even if their electrical work is fine.

Why Registration Alone Isn't Enough

Being on TNB's list confirms one thing: a contractor is legally permitted to do electrical work and liaise with TNB. It says nothing about how fast they work, how they price a job, or whether they've actually handled a residential 3-phase conversion before versus general wiring repairs.

It's a question we get from customers often enough to know it's a real gap: "can you recommend someone for the TNB upgrade?" The honest answer is that registration status and price aren't the same thing as reliability, which is exactly why the checklist below matters more than the list itself.

What to Check Before Hiring a Contractor

TNB 3 Phase Cost: What You'll Actually Pay

The TNB 3 phase cost breaks into two separate parts: your contractor's rewiring and TNB liaison fee, typically RM3,000 to RM5,000, and TNB's own connection and metering charges, billed separately. Get both figures broken out, not bundled into one number, so you know what you're actually paying for.

A quote below RM3,000 isn't necessarily a bargain. Check what's excluded first, since DB replacement and TNB liaison are the two line items most often left out.

Standalone Hire or Bundled With Solar?

If you're planning a solar installation or pairing solar with an EV charger, bundling your phase upgrade into that job usually costs less overall, since your installer coordinates the site assessment, DB sizing, and TNB liaison as one job instead of two separate contractor visits.

If you're upgrading standalone, for an EV charger alone or general capacity needs, you're responsible for vetting and hiring the contractor yourself using the checklist above. Either way, if you haven't confirmed you need the upgrade at all, start with our guide to single phase vs 3 phase power before you get quotes from anyone.

Frequently Asked Questions

How do I check if an electrical contractor is registered with TNB?

Search their name or registration number directly on TNB's official contractor search tool. Don't rely on a contractor's own claim that they're registered.

Is a cheaper 3-phase contractor quote always worse?

Not necessarily, but check what's excluded. A low quote that leaves out DB replacement or TNB liaison work often costs more once those get added back in.

Can I use any electrician for a 3-phase upgrade, or does it have to be TNB-registered?

It has to be a contractor registered with Suruhanjaya Tenaga. An unregistered contractor's work can get your TNB application rejected, regardless of how good the wiring itself is.

What's the TNB 3 phase cost for a residential upgrade in Malaysia?

Budget RM3,000 to RM5,000 for the contractor's rewiring and TNB liaison work, separate from TNB's own connection and metering charges. See our full conversion cost and timeline breakdown for the complete process.

Check the Registry Before You Check Reviews

TNB publishes its contractor registry publicly, but almost nobody starts there. Search the registry, confirm registration, then vet on experience, quotation clarity, and warranty, in that order. Skipping the registry check is the one mistake that can cost you the whole application, instead of a bad rewiring job.

Check out our free solar calculator to calculate your potential roof savings, or chat with the team on WhatsApp whenever you're ready.