Single phase power is installed in most homes on the Central Coast. Its generally 230v on the Central Coast, actually Australia wife. However, in WA and QLD single phase is currently 240v. Although transition programs have commenced the transition of all single-phase power in WA and QLD to 230V. In electricity the phase refers to the distribution of the load. Single phase power is generally connected to Central Coast Homes. Classically, there is one power wire coming into the home from the Ausgrid network. This is the phase wire and one neutral wire. The current flows between the neutral and the power wire. Your Single Phase electricity supply may need to be upgraded to 3 phase power.