An unmetered connection is a supply to equipment which does not require a meter, e.g. street lights, traffic signals, some communications cabinets etc.
The Electricity (Unmetered Supply) Regulations 2001specify strict criteria for determining whether or not a connection can be unmetered:
a) The load must be predictable. If the value of the load or its duration cannot be readily predicted the connection must be metered. Standard electricity sockets may not be installed at an unmetered connection as equipment connected to the socket cannot be determined.
b) The demand at each load point should be rated below 500W. In some limited circumstances, where it is not practical to install metering due to high costs, technical difficulties or legals reasons, it is acceptable for load in excess of 500W to be unmetered. All loads above 500W shall be submitted to the Unmetered Connection team who will determine if the load can be unmetered.
c) The total combined load beyond the Supply Point shall not exceed 5kW (per fuse way) The Supply Point is the point of connection to the authorised distributors network (exit point of WPD’s network, e.g. outgoing fuse terminal of WPD’s cut out).