At any point throughout the supply chain, from large generators through the transmission and distribution systems to the customer’s own installation, there are factors that can influence the amount of power available, reliability and quality of supply. The nature of the supply system and the location of the customer both have a significant effect on quality, reliability and supply restoration times.
Overhead power lines are a widely used and economic way of transmitting and distributing electricity. They are vulnerable to a variety of environmental and third party influences such as storms, lightning strikes, vandalism, and vehicle accidents. If network faults or damage occur, the problems can usually be found by visual inspection and repaired reasonably quickly.
Underground cables are considerably more expensive than overhead lines and are often installed for aesthetic, load density or safety reasons (eg. avoiding the need to have overhead power lines close to multi-storey buildings in city streets). They are more complicated in construction but are also protected from most of the problems encountered by overhead power lines. However, if they are damaged or develop faults, the time taken to locate problems and carry out repairs can be much greater.
The residential and commercial areas in cities and major towns will have a mixture of high and low voltage underground cables and overhead power lines. These areas are often supplied from an interconnected network with at least one alternative source of supply. In the event of a failure, line crews can usually restore supply to most customers by field switching within an hour or two. After network faults there will often be a small set of customers that cannot have their electricity supply restored until repairs are completed.
Rural (also known as 'non-urban')
Areas outside the CBD and urban areas, such as rural regions and associated small towns, are usually supplied by overhead lines with limited or no interconnections to alternative sources of supply. Lines are categorised as “Short Rural” where lines are up to 200 km long, and “Long Rural” where lines may be many hundreds of kilometres in length. As a general rule, as line length increases, the incidence of faults increases due to greater exposure to weather, vegetation and other environmental factors that cause faults and disruptions. Repairs can also take longer because of the time involved for response crews to travel and then find and repair the damaged parts of the system.
When applying to connect to the local electricity network, it's important to determine if you are in our distribution area.
Below is a map which indicates our network area. Be sure to check with us about the location of the property you wish to connect as soon as possible. You can check by calling 13 13 65