Swapping out an old light fitting for a new one seems like a straightforward weekend job — but in New Zealand, electrical work is tightly regulated, and getting it wrong can be dangerous or even illegal. Here's what you need to know before you reach for the screwdriver.
What Is Restricted Electrical Work in NZ?
Under the Electricity Act 1992 and its regulations, most electrical wiring work in NZ is classified as restricted electrical work (REW). This means it must be carried out — or directly supervised — by a licensed electrician registered with the Electrical Workers Registration Board (EWRB).
Replacing a light fitting typically involves connecting wires to the fitting's terminal block or ceiling rose. This connection work is REW, and doing it yourself without a licence is illegal and could void your home insurance.
What Can a Homeowner Legally Do?
There is a specific exemption in the regulations that allows homeowners to do like-for-like replacement of fittings in certain situations — but the rules are narrow:
- You may remove an old light fitting and install a new one if the new fitting uses the same type of connection (e.g., a standard ceiling rose with a plug-in pendant).
- You may change a lightbulb or replace a shade or diffuser that doesn't involve touching any wiring.
- You may install a light fitting that is designed to be plugged into a standard GPO (power point) — no wiring involved.
However, if the job involves:
- Connecting or disconnecting wires at a ceiling rose, junction box, or terminal
- Installing downlights that require new wiring or cutting into the ceiling
- Adding a new circuit or moving a light switch
- Any work in a bathroom, laundry, or other wet area
…then it is restricted electrical work and must be done by a licensed electrician.
⚠️ Safety note: Even when work is technically exempt, always turn off the circuit at the switchboard and use a non-contact voltage tester to confirm the power is off before touching anything. Electricity can kill.
Wet Areas: Extra Rules Apply
Bathrooms and other wet areas have additional requirements under the NZ Building Code clause G9 (Electricity). Light fittings in these zones must meet specific IP (ingress protection) ratings, and all electrical work must be done by a licensed professional. Don't attempt any electrical work in a bathroom yourself.
Step-by-Step: Changing a Simple Pendant Light (Where Permitted)
If you have a standard ceiling rose with a plug-in pendant fitting and are doing a true like-for-like swap with no wiring changes, here's the general process:
- Turn off the circuit at the switchboard and lock or tag it if possible.
- Test with a voltage tester to confirm power is off at the fitting.
- Remove the old fitting — unscrew the canopy or rose cover and carefully detach the pendant.
- Attach the new fitting following the manufacturer's instructions.
- Restore power and test.
If at any point you see wiring that looks damaged, unfamiliar, or if the fitting doesn't match what you expected, stop and call a licensed electrician.
Choosing the Right Fitting
When buying a new light fitting, check:
- IP rating — required for bathrooms and outdoor areas (look for IP44 or higher for wet areas).
- Compatibility — LED downlights may need compatible dimmers; check with the supplier.
- Ceiling type — some fittings aren't suitable for insulated ceilings (important for fire safety with downlights).
Bunnings and Mitre 10 both stock a wide range of light fittings with product information to help you choose the right one.
What Does a Licensed Electrician Do After the Work?
For any restricted electrical work, your electrician must issue a Certificate of Compliance (CoC). This is your legal proof that the work was done correctly and to the NZ standard. Keep it with your home's records — you'll need it if you sell the property or make an insurance claim.
Cost Guide (Approximate)
As a rough guide only, a licensed electrician typically charges by the hour plus materials. A straightforward light fitting replacement might take less than an hour, though call-out fees vary by region and tradesperson. Get at least two quotes for larger jobs.
When to Call a Professional
Always hire a licensed electrician for:
- Any wiring connections at a ceiling rose, junction box, or switchboard
- Installing downlights, exhaust fans, or heat lamps
- Any electrical work in bathrooms, laundries, or outdoors
- Upgrading to smart lighting systems that require new wiring
- Anything you're unsure about
You can find qualified, local electricians on tradedirectory.co.nz. Always check that your electrician is registered with the EWRB before work begins.