Major New 2018 Wiring Rules changes



Gary Busbridge, Standardisation Manager at Clipsal and Chair of the Australian and New Zealand committee responsible for the revision of the new Wiring Rules (AS/NZS 3000), provides an overview of the major changes in the new edition released June 26th, 2018.


Mains switches

An important consideration is that of main switches. These are invaluable in protecting the installer when working on circuits within an installation. That ability to lock off is so important. To that end, a main switch must be manually operated in a single mechanical action using a knob, lever or push-button or the like. Electronic touch screens, programmable control systems or the like shall not be used as a means of operating main switches.


Safety Services

There has been a total restructure of Clause 7.2 Safety Services to help the reader in understanding the requirements of the section. For too long there has just been further detail added to the section in various clauses and it is up to the reader to find the necessary requirements of various types of installations.

To this end the restructure has separated each of the relevant types of installations with its own requirements without having to refer to other clauses within the section. Therefore, if you want to find out the requirements for “air-handling systems” or “main switches”, just head to the relevant clause and all of them are there.


Alterations and Repairs

Where a whole switchboard is being upgraded to replace existing protection then that switchboard is to be brought up to date with RCD protection. A repair is a like-for-like replacement and as such does not require the installation of an RCD for that final sub-circuit. This extends to a replacement of an existing socket-outlet with a multi-socket-outlet, as it is deemed to be a point for maximum demand calculations no matter the number of socket-outlets on the one fixed wired device.

The replacement of halogen lights with LED lighting is also seen as a repair. An alteration however is a change to the existing final sub-circuit and as such requires a 30mA RCD at the switchboard (or a 30mA socket-outlet RCD at the start of an extended circuit).

Stay tuned for all the changes covering Kitchens, Arc Fault Detection Devices (AFDDs), Switchboards, Lifts, Water heaters, Conductors, Outbuildings and Recessed Lighting.






Get yourself a copy of AS/NZS 3000:2018 now and find out exactly what has changed.

Buy now

For more information visit



* Gary Michael Busbridge has been with Clipsal for over 40 years, after graduating from the University of South Australia in 1973. Predominantly, his responsibility was Design Manager for all Australian Electrical Accessories, including aspects of Data and C-Bus, Export and Industrial design, development, product maintenance and prototyping. Inevitably, this led to involvement with the Standards Association of Australia and membership of committees and working groups from 1998.

His new role of Standardisation Manager is to ensure Global and Regional Standards are aligned to the electrical contracting business and electrical accessories manufacture. This also includes relevant IEC standards and applications. In November 2011 he was made Chairman of the EL001 Wiring Rules standards committee.





Keep Reading