There is a number of approved revenue metering arrangements which can cause confusion. The following are examples of some of the more common metering systems:
Direct wired metering
This is the most common type of metering for loads up to 100 amps per phase. A single meter is located on a panel in the main switchboard alongside the distribution panel.
Remote direct metering
Similar to direct metering however, the meter is housed in an enclosure away from the main switchboard. The maximum distance from the meter enclosure to the main switchboard is 30 meters route length.
Distributed master metering
Used in multiple unit development where the meters are distributed throughout the site on individual units. This arrangement is not available in areas supplied by Horizon Power.
Multiple master metering
This is also used for multiple unit developments however the meters are grouped together within the same enclosure. In some cases there may be more than one group of meters in which case there will be a minimum of 4 meters in each group.
Current transformer (CT) metering
Used for low voltage installations where the load exceeds 100 amps. This type of metering can be a single meter arrangement or incorporated in either distributed master or multiple master arrangements.
These arrangements are not the only types of metering but are the most common types further information on metering is provided in section 11 of the Western Australian Distribution Connections Manual.