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What more do I need to know about a large commercial connection?

  • These type of connections usually require a substation.
  • There are some physical clearances that are required between the electricity network and your equipment.
  • When you’re considering your substation site, please read the Western Power Distribution Substation Manual.
  • If you would like to apply for a non-compliant site please submit a feasibility study and one of our consultant engineers will let you know if it can be used.
  • The final specifications for the substation requirements will be determined when our engineers create your design. This means that the substation site you provide may be subject to change.
  • We will install the substation as part of the construction works; however you will need to prepare the site in advance. Some assistance can be found in the Western Australian Distribution Connection Manual.
  • If your supply will be greater than 100A your electrical contractor will provide the appropriate sized current transformers.
  • Your electrical contractor will need to complete the installation of direct metering.
  • We will be responsible for terminating the consumer mains into the kiosk or transformer.
  • If your property will have multiple points of supply, then check compliance information from the West Australian Electrical Requirements.
  • In some cases non-compliant points of supply might still be viable, if you would like explore this option please submit a feasibility study.
  • If you intend to have a new or altered high voltage installation, your electrical contractor will need to submit a HV submission. Please note, this submission doesn’t need to be included with your application, but you will need to submit it before requesting the energisation of your installation.
  • If you are connected to the high voltage network, at 11kV and 22kV discrete loads up to 4MVA can generally be supplied to one switchboard. Discrete loads 4MVA up to 8MVA must be split evenly across two switchboards (with a maximum of 4MVA per switchboard). For discrete loads above 8MVA, we will assess them on an individual basis.

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