Source: Worksafe New Zealand
An independent review has confirmed WorkSafe’s Energy Safety team gave technically sound and justified advice on last year’s regulatory amendments on electrical wiring.
The changes support modern energy systems, including renewable generation, battery storage, backup power, and electric vehicle charging, and enable safer, more resilient electricity supply.
WorkSafe initiated an independent review in response to sector concerns about the switching of earthing and Protective Earth and Neutral (PEN) conductors. The review was conducted by UK‑based chartered engineer Graham Kenyon, an electrical safety expert with 30 years’ experience. He found Energy Safety’s advice was technically justifiable overall and that any residual risks are real, known, and manageable through clear guidance and appropriate technical standards. Many risks are already partially mitigated through existing regulations, licensing requirements, and product standards.
“This independent review confirms our evidence-led approach to electrical safety regulation,” says WorkSafe’s national manager of High Hazards, Energy and Public Safety Darren Handforth.
Switching of earthing and PEN conductors has been permitted in New Zealand in limited circumstances since at least 1961.
“The review also confirms that the regulatory change was necessary to keep pace with modern energy technologies, while being clear about where further guidance is required to manage risk. We advise electricians to avoid installing switching or similar devices in earthing or PEN conductors until the further guidance is published.”
Energy Safety will now focus on the next phase of work. This includes developing and supporting industry guidance on supply changeover and island‑mode operation. It also involves clarifying expectations for switching arrangements, and working with standards bodies and sector partners on appropriate technical standards for emerging technologies such as open‑PEN detection devices.
The Electricity (Safety) Amendment Regulations 2025 allow electricians to use either the 2007 or 2018 wiring standard (AS/NZS 3000) until 12 November 2026. After that date, the 2018 standard becomes mandatory.
Energy Safety is the regulator for ensuring the safe supply and use of electricity and gas in New Zealand.
