Commercial subdivisions

The electrical infrastructure in new commercial subdivisions is designed according to lot size, unless the developer specifies that it must cater for a higher load. The design load for commercial subdivisions is 200kVA / hectare. Charges for electrical infrastructure vary, as they are based on the individual requirements of each request for supply.

Before purchasing a lot in a new commercial subdivision, a decision must be made as to whether the design load value can supply the electricity required by the business. If three-phase power or more than the available supply is required, the network may need to be upgraded at your cost.

Many businesses require three-phase power.  To find out if three-phase power is available in the area, call 13 10 87 or make an online enquiry.

How to apply

For all connections to the distribution network at 33kV or less, please complete a Design and Quotation Application form.  Your electrical contractor can advise you about this and we recommend he/she help you complete the form.

If your operation will be connected to the transmission network, at 66kV or more, your electrical contractor or consultant should complete a Transmission Load Application form (XSL 328kb).

Western Power standard supply

Western Power defines standard supply at 240 V single-phase or 440 V three-phase as:

• 63 Amps single-phase (urban areas)
• 32 Amps single-phase (rural areas and towns)
• a maximum consumer mains size of 35mm²

The cost for more than a standard supply can vary, as the surrounding network may need to be upgraded to meet the capacity requirements. This upgrade could include the installation of transformers, switchgear and conductors, resulting in significant additional cost. 

Who is your Electricity Retailer?

You buy electricity from an electricity retailer.  They manage your account and send your electricity bill.  Western Power transports electricity through the network, but does not sell it.

• If you use less than 50MWh a year (that's about 137 units a day or $8000 worth of electricity a year), your electricity retailer is Synergy.  You can go to their website or call 13 13 53.
• If you use more than 50MWh a year, you may choose your electricity retailer and negotiate your tariff.   The Office of Energy provides a list of electricity retailers.

The Applying for an upgrade or a new connection fact sheet (lPDF 262kb) provides more information on the role of electricity retailers in the new connection and upgrade process.

For infomation on clearance procedures and to request clearance please download the Request for clearance form (PDF 132.6kb).