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The wiring rules are changing

The Australian Standard AS/NZS3000 is being updated and will be released later this year. To help you prepare, here’s the first of a few summaries we’ll send you about the most important changes to requirements.

Safety switch requirements and mechanical protection of cabling

The new Wiring Rules require safety switches on all final sub-circuits in domestic/residential installations. This includes fixed electrical equipment like cooktops, hot water systems and air conditioning units. The existing requirements for a maximum of three circuits per RCD, minimum two RCDs remain for domestic/residential electrical installations. However, we recommend that each final sub circuit is protected by a separate safety switch to minimise loss of supply to multiple circuits.

For non-domestic/non-residentialelectrical installations:

  • 30mA RCDS shall be installed on all lighting and socket outlet final sub-circuits ≤ 32A (previously it was 20A).
  • 30mA RCDS should be installed on all final sub-circuits ≤ 32A supplying fixed wired electrical equipment.
  • 30mA RCDS shall be installed on all final sub-circuits supplying fixed wired electrical equipment that may represent an increased risk of electric shock, such as environmental conditions (e.g. wet areas) and the type of electrical installation and processes being conducted.

The RCD requirements for medical electrical equipment in home care installations requires compliance with AS/NZS3003. AS/NZS3003 has also been completely revised and the new edition was published in 2017.

The new Wiring Rules also have more detailed requirements to provide mechanical protection of cables in ceiling spaces in positions where they are likely to be damaged.

Watch our short film summarising the new requirements for safety switch and mechanical protection of cabling.

Last updated
07 July 2017

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