AS/NZS 3000 in New Zealand

How the Australian/New Zealand Wiring Rules apply in New Zealand specifically, after the 2025 regulatory update. What the 11 NZ-specific deviations are, what the CoC / ESC / RoI tripartite certification system looks like, and what WireSketch does — and doesn’t — model for NZ installations. (This page is the NZ-specific companion to the existing AS/NZS 3000 page, which describes the Australian view.)

What changed in New Zealand

The Electricity (Safety) Amendment Regulations 2025 (SL 2025/225) came into force on 13 November 2025. They replaced the older AS/NZS 3000:2007 (+A1+A2) with AS/NZS 3000:2018 (+A1+A2+A3) as the cited primary wiring standard in the New Zealand Electricity (Safety) Regulations 2010.

The transition has two key dates:

• 13 November 2025 — voluntary compliance with the 2018-edition citation begins.
• 13 November 2026 — mandatory for new installations whose construction begins after 12 November 2026.

The 12-month bridge means that until 12 November 2026, an NZ electrician can elect to design and certify to either edition. After that date, new builds are on AS/NZS 3000:2018 in New Zealand. Historically, the EWRB had warned that premature use of AS/NZS 3000:2018 in New Zealand could itself constitute an offence because earlier ESR cited the 2007 edition — that gap is now closed by SL 2025/225.

The 11 NZ-specific deviations

New Zealand adopts AS/NZS 3000 with 11 documented deviations from the joint AS/NZS baseline. WorkSafe NZ enumerates them; among the named ones are:

• RCD function testing — an NZ-specific RCD test requirement.
• Home-care medical electrical equipment — an exemption deferring to AS/NZS 3003 for medical-equipment installations in home-care settings.
• Terminology change “hazardous area” → “exclusion zone” in clauses 4.18.2.3, Figure 4.18, 4.18.5 and Figure 4.20.

The full set of 11 numbered changes is published by WorkSafe NZ in its citation notice. The implication for any planning tool: if you are reading the standard with an Australian frame, the NZ reading diverges in named clauses, and a wet-area diagram drawn under the AS-only reading will use different wording for the same geometry.

The enforcement model: CoC + ESC + RoI

NZ requires electrical work to be certified via a tripartite system under the Electricity (Safety) Regulations 2010:

• Certificate of Compliance (CoC) — Regulation 65. Confirms that prescribed electrical work was carried out in accordance with the regulations and AS/NZS 3000.
• Electrical Safety Certificate (ESC) — confirms the connected installation is safe to use.
• Record of Inspection (RoI) — Regulation 72. Required for high-risk prescribed electrical work; identifies the inspected work, is signed and dated by the inspector, and states whether the installation is electrically safe both as inspected and when powered.

All CoCs and ESCs must display the Authentication Mark, with templates published by EWRB and industry. The regulator is WorkSafe NZ; the Electrical Workers Registration Board (EWRB) administers worker registration. The practical implication: the legal compliance artefacts in NZ are the CoC, ESC and (where required) RoI, not anything a planning tool produces. WireSketch’s output is a design and discussion artefact only.

What WireSketch models from AS/NZS 3000 (NZ-specific)

Honest answer: WireSketch does not yet model the NZ-specific adoption of AS/NZS 3000 separately from the Australian one. The current selector AS/NZS 3000 (Australia / New Zealand) works as a baseline because the underlying joint standard is the same. With it you get a layout that matches AS/NZS 3000 conventions, with the following caveats for NZ users:

• The wet-area diagram in the app uses the joint AS/NZS 3000 language; in NZ those zones are labelled exclusion zones in clauses 4.18.2.3, Fig 4.18, 4.18.5 and Fig 4.20, not “hazardous areas”.
• The NZ-specific RCD function testing requirement is not surfaced.
• Home-care medical-equipment installations defer to AS/NZS 3003 in NZ; the planner does not flag this.
• The CoC / ESC / RoI tripartite certification chain is not produced by the app.

What WireSketch doesn’t model

• The 11 NZ-specific clause deviations — including the RCD function-testing requirement, the AS/NZS 3003 home-care medical exemption, and the “exclusion zone” terminology change in the wet-area clauses.
• CoC / ESC / RoI templates — the EWRB-mandated form factors, Authentication Mark and field requirements are not produced by the app.
• SL 2025/225 transition window — the 13 Nov 2025 voluntary → 13 Nov 2026 mandatory bridge is regulatory context, not a planner feature.
• Network operator energisation workflow — the planner does not interface with NZ lines-company connection acceptance.
• High-risk PEW identification — the planner does not flag which proposed work falls under Regulation 72 and therefore requires a RoI.

Practical tip

If you are a homeowner in New Zealand planning a remodel or new build: use WireSketch with the AS/NZS 3000 selector to capture the layout you want, generate the Renovation Brief PDF, and give it to your NZ electrician. Be explicit that you understand AS/NZS 3000:2018 is cited via SL 2025/225 with NZ-specific deviations, and that the legal artefacts are the CoC, ESC and any required RoI displaying the Authentication Mark.

If you are an NZ electrician or inspector, treat WireSketch as a layout and client-communication tool. Translate the layout to AS/NZS 3000:2018 with the 11 NZ deviations — in particular check the wet-area clauses use the “exclusion zone” terminology — and issue the CoC, ESC and any required RoI through the EWRB templates.