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Distribution

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Distribution networks transport power to end-use consumers through a network of overhead wires and underground cables. In total, there are over 150,000 km of distribution lines in New Zealand. The distribution networks also include zone substations which convert electricity to lower voltages.

Almost all consumer premises in New Zealand are connected to a distribution network.  There are two types of distribution networks: local networks that are connected to the national grid, and secondary networks (such as within a large shopping mall) that are connected to a local network.  There are also some generators, known as embedded generators, which are linked directly to distribution networks.

There are 29 distribution companies that own the local distribution networks throughout New Zealand.  Although some of the largest distribution companies are publicly listed, most companies are owned by local trusts or other local bodies.

Lines companies vary widely in size.  The four largest companies (Vector, Powerco, Wellington Electricity Distribution Network and Orion) account for about 60% of all connections.

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