Electricity is supplied to most Queensland customers via an electricity distribution system, which connects the high-voltage transmission system to individual customer premises.
These distribution systems (also called supply networks) consist of electric lines, substations and associated equipment.
Queensland's electricity distribution networks are extensive, with a total line length of about 232,000km. Three distributors supply 2.2 million industrial, commercial and domestic electricity consumers.
Energex operates in South East Queensland. It has a distribution area of 25,000km2 which includes more than:
- 54,200km of overhead powerlines and underground power cables
- 680,000 power poles (including customer and public light poles)
- 380,000 street lights
- 50,000 distribution transformers.
Ergon Energy operates in rural and regional Queensland. Its network covers over 1 million km2 and consists of more than:
- 178,000km of powerlines and underground cables
- 1 million power poles.
Essential Energy (formerly known as Country Energy) is a New South Wales distributor which has a supply network that extends into Queensland near Goondiwindi. Essential Energy holds an authority to operate in Queensland and Origin Energy provides electricity as the retailer within this area.