AS/NZS 3000:2018, Electrical installations, includes a number of changes from the 2007 version, aimed at improving the safety and efficiency of the electrical industry. Here are some of the changes you will find in the 2018 version of the Wiring Rules. 

Section 1

  • The definition of mains supply has been removed.
  • ‘Direct contact’ and ‘indirect contact’ are now designated ‘basic protection’ and ‘fault protection’.
  • IP ratings revised to suit local environmental conditions.
  • Requirements for conductors with green/yellow insulation are specified.
  • References to AS/NZS 3018 have been replaced with references to other Standards.
  • Requirements for alterations and repairs have been clarified and expanded.

Section 2

  • Operating characteristics of switchgear, control gear and switchboards have been added.
  • Origin requirements of sub-mains and final subcircuits have been added.
  • Requirements for main switch operations have been added.
  • Positions of overload protective devices have been clarified.
  • Requirements for alternate positions of short circuit protective devices have been updated.
  • Protection requirements for switchboard internal arcing faults have been enhanced.
  • Requirements for RCD protected circuits in domestic, non-domestic, non-residential and medical installations have been added, and RCD requirements for alterations and repairs clarified.
  • Illustration of basic clearances for switchboard access has been updated.
  • Requirements for switchboard installations at 800 A or greater have been enhanced, including access and egress, switchroom door sizes and minimum clearances around switchboards in switchrooms.

Section 3

  • Improved installation safety requirements for cables that pass through bulk thermal insulation.
  • Colour identification of active, neutral and earth conductors further clarified.
  • Requirements for wiring systems installed in positions where they are likely to be disturbed have been clarified.
  • Requirements for segregation of cables of different voltage levels have been clarified.

Section 4

  • Revised figures identify where IP rated equipment is to be installed.
  • The requirements for installation wiring connected via an installation coupler have been revised.
  • Electric vehicle socket-outlet requirements now included.
  • Requirements for lighting equipment and accessories have been revised.
  • Requirements for cooking appliance switching devices clarified for improved safety outcomes.
  • Gas appliances and equipment isolation requirements clarified.
  • Installation and location requirements for socket-outlets for electric vehicle charging stations have been added.
  • Clearance requirements for socket-outlets and switches from open gas or electric cooking appliances have been added.
  • Requirements for lifts installed for general use and that are not emergency lifts (safety services) have been added.

Section 5

  • MEN system further defined for clarity.
  • Acceptable earth electrodes types have been updated.
  • Equipotential bonding requirements have been expanded and clarified through enhanced requirements for showers, bathrooms, pools and spas.
  • Earthing of conductive building materials in combined outbuildings.
  • Earthing of conductive reinforcing in combined outbuildings that contain showers or baths.
  • Conductive pool structures and the bonding connection point required to be installed and bonded to the installation earthing system regardless of other specified requirements.
  • Figure showing bonding arrangements for pools and spas has been added.
  • Requirements on conductive fixtures and fittings installed within arm’s reach of the pool edge, and that are in contact with the general mass of earth, either directly or indirectly, have been added.

Section 6

  • Installation requirements for deluge showers have been clarified.
  • Showers Zone 1 has been clarified for different shower head configurations.
  • A figure for showers with a hinged door has been included.
  • Specified capacity for spa pools or tubs has been increased from 500 L to 680 L.
  • Electricity generation systems, including inverters have been excluded from being installed in classified zones.

Section 7

  • Clause 7.2, Safety services, has been restructured.
  • Installation requirements for electricity generation systems have been reviewed and clarified in line with applicable Standards.
  • Electric vehicle charging system requirements have been added.
  • Clause 7.8, Standards for specific electrical installations, has been revised.

Section 8

  • A number of clauses split into subclauses to differentiate between general, application, visual inspection, test requirements and accepted values.
  • Extra low voltage installation testing requirements have been relocated to Section 8 from Section 7.
  • Clarification of RCD testing and EFLI testing.

Appendices

  • Appendix A—Now a single list of referenced Standards.
  • Appendix D—Revised to provide more comprehensive guidance information for the construction of private aerial lines.
  • Appendix K—Switchboard equipment summary has been added to provide a checklist of requirements for switchboards.
  • Appendix N—New Appendix to provide guidance on the types and variations of conduit available for electrical installations.
  • Appendix P—New Appendix to provide guidance for circuits intended to supply energy to electric vehicles.
  • Appendix Q—New Appendix to provide guidance for the selection of circuit protection and switching devices when being operated on a d.c. supply that would be deemed to meet the design, equipment selection and installation criteria of this Standard.