Is test and tag legally required in New Zealand?

This is the question we get asked most, and the honest answer is more useful than either of the answers you will usually get.

Some providers will tell you testing is the law. It is not. Some businesses conclude from that it is optional. It is not that either.

Here is how it actually works.

The duty you actually have

Start here, because this is the part that binds you.

The Health and Safety at Work Act 2015 requires a PCBU — a person conducting a business or undertaking — to ensure, so far as is reasonably practicable, the health and safety of workers and others affected by the work. Faulty electrical equipment is an obvious hazard, so managing it falls squarely inside that duty.

The Electricity (Safety) Regulations 2010 apply to appliances, leads and hand-held tools connected to electricity, and require that they are electrically safe.

Two things follow, and they are the whole of it:

1. You must keep the equipment safe. Not "should". Must.
2. You must be able to show how you know it is safe. "Reasonably practicable" is a standard you have to be able to demonstrate, not merely assert.

That second point is the one businesses underestimate. A duty you cannot evidence is, in practice, a duty you have not met — because the moment anyone asks, the absence of evidence is the finding.

What the law says about testing specifically

Now the nuance, because you deserve the accurate version and because someone will eventually quote WorkSafe at you.

No New Zealand law names test and tag. No clause in any Act or regulation sets a testing interval for in-service appliances. WorkSafe's own guidance says so directly:

Read that carefully, because it is routinely quoted at half length. It says testing is not mandatory and it says keeping equipment safe is legally required. Both halves are load-bearing.

What the law does is set the outcome and leave you the method. AS/NZS 3760 is a standard, not a law — but working to it is the most widely accepted way of showing you have taken reasonable steps, which is exactly why the industry exists.

So "not mandatory" does not mean "not necessary". It means the obligation is on the outcome, and testing is how sensible businesses hit it.

Why almost every business tests anyway

Because the alternative is worse in four specific places, and all four are more likely than a WorkSafe visit.

• After an incident. If someone is hurt by faulty equipment, "we looked at it occasionally" is a materially weaker position than a register showing every item, its last test and its next due date. This is the one that ends careers.
• Insurance. Many commercial policies ask about electrical maintenance, and some claims processes will ask for evidence.
• Client prequalification. Sitewise, Impac and most large-contractor systems ask for it directly. In construction and facilities work it is frequently a condition of getting on site at all.
• Selling or leasing. Due diligence asks. Missing records are a discount.

None of those are the law. All of them are real, and three of them will reach you long before a regulator does.

When testing is effectively unavoidable

There are situations where, although no law names test and tag, you would struggle to justify not doing it:

• Construction and demolition sites — AS/NZS 3012 sets requirements for electrical supply and equipment on site, and most principal contractors mandate tagging as a condition of access. See test and tag on construction sites.
• Hire and lease equipment — you are supplying equipment to people you do not supervise, in conditions you cannot control.
• Equipment used by the public or by vulnerable people — schools, early childhood centres, care facilities. See test and tag for schools and early childhood centres.
• Where a client contract requires it — a contractual obligation is still an obligation.

What this means in practice

The goal is not a tag on a cord. The goal is being able to answer, quickly and with evidence, the question "how do you know this equipment is safe?"

That means:

1. Knowing what electrical assets you actually have, and where. Most businesses do not. Start with building an asset register.
2. Setting an inspection and testing interval per area based on real risk, not one blanket interval across the site. See how often you should test and tag.
3. Recording the result, the date, who did it, and why that interval was chosen.
4. Doing routine visual checks in between — damaged cords and plugs cause far more incidents than internal appliance faults, and anyone can be taught to spot them.

Steps 2 and 3 are where AS/NZS 3760 earns its place. Steps 1 and 4 cost almost nothing and are where a large share of the actual safety comes from.

The businesses that get this right are not the ones testing the most. They are the ones who can answer the question in thirty seconds.

For the opposite case — an obligation that genuinely is black-letter law — see emergency lighting testing and your Building Warrant of Fitness. And if you want the interval for your own site, the testing frequency checker takes four questions.