Subdivision Switchboard & Metering Requirements in Western Australia

In Western Australia, subdivision switchboard requirements (SMSB) are critical for developers and electrical contractors to satisfy regulatory and compliance standards. This guide explains SMSB approval processes, metering requirements under WAER/WASIR, and key Western Power guidelines.

Site Main Switchboard (SMSB) requirements

A Site Main Switchboard (SMSB) plays a central role in supplying power to lots within a subdivision in Western Australia and must meet planning and electrical network requirements before energisation.

SMSB Approval Process in WA

• The requirement for an SMSB forms part of the Western Australian Planning Commission (WAPC) approval process for subdivisions.
• Compliance with Western Power and Horizon Power standards is essential to ensure power supply can be provided to each lot in accordance with Western Australian electrical regulations.

SMSB Installation Standards and Clearance Certificate

• Electrical contractors must supply and install a SMSB as part of the approval process.
• A clearance certificate will not be issued to the land developer until a Notice of Completion is received.

West Australian SMSB Guidelines & References

Electrical contractors should refer to the relevant Western Australian standards and network operator guidelines, including:

• the Western Power Small Strata Subdivision Guidelines.
• WAER (Western Australian Electrical Requirements)
• WASIR (Western Australian Service and Installation Requirements).

Adhering to these standards ensures SMSB installations meet compliance obligations for subdivisions in Western Australia.

Important Considerations for Electrical Contractors 

• Verify the location, size, and type of SMSB required based on the type of subdivision (e.g., freehold or strata).
• Take into account the number of units on site, as this will affect the size of consumer mains and SMSB.

Metering and Equipment Requirements & Installation Standards

Installation standards:

• Adhere to WAER and WASIR metering regulations for all metering and associated equipment.

 Important Considerations for Metering

• Ensure that Distributed Master Metering and Multiple Master Metering are not mixed on the same site.
• We encourage electrical contractors to thoroughly review these requirements and guidelines to ensure full compliance and to avoid potential issues.

If you require further clarification on subdivision electrical compliance, SMSB requirements, or WA metering standards, ECA Technical can provide guidance specific to Western Australian projects.

For further assistance or detailed guidance, please contact ECA Technical on (08) 6241 6100 or technical@ecawa.org.au.