Explanations of our frequently used terms


Geographic Information System – software that maps our electricity network.

Overhead powerline

Powerline cables and wires, usually strung along a series of pole structures to distribute electricity at various voltages. We operate and maintain 183,612 km of overhead powerlines.


Packaged ground mounted distribution substation, generally painted green and approximately the size of a small car.


Pillars are small above-ground boxes that serve as a junction point for underground low voltage cables.


Structure used to carry overhead powerlines. Most poles used across our distribution territory are wood, but concrete, steel and other materials are used on some sections of the network.


High-strength, tensioned wire anchored into the ground or to another pole to assist the structural integrity of power poles.

Underground powerline

Electricity cable/wires, installed directly, buried underground or within conduits to distribute electricity at various voltages. Most new urban land subdivisions have underground electricity distribution and Essential Energy also has underground distribution on other sections of its network such as central business districts.