Electricity Industry Terms

An organisation responsible for maintaining electricity meters
Supply Number or S-Number, is a 21-digit reference used in Great Britain to uniquely identify electricity supply points such as individual domestic residences
DNOs, are companies licensed to distribute electricity in Great Britain by the Office of Gas and Electricity Markets.

There are fourteen licensed geographically defined areas, based on the former area electricity board boundaries, where the distribution network operator distributes electricity from the transmission grid to homes and businesses. Under the Utilities Act 2000 they are prevented from supplying electricity; this is done by a separate electricity supply company, chosen by the consumer, who makes use of the distribution network.

Distribution network operators are also responsible for allocating the core Meter Point Administration Number used to identify individual supply points in their respective areas, as well as operating and administering a Meter Point Administration System that manages the details relating to each supply point. These systems then populate ECOES, the central online database of electricity supply points.
Independent Distribution Network Operators (IDNOs) develop, operate and maintain local electricity distribution networks.

IDNO networks are directly connected to the Distribution Network Operator (DNO) networks or indirectly to the DNO via another IDNO.
Kilovolt-ampere (kVA) is the measurement for your agreed supply capacity. This refers to the capacity of the network cables. The amount required for your cable installation work is agreed between you and the distribution company
A current transformer (CT) operated meter. This type of meter uses current transformers to monitor the flow of current because the wires are too large to connect directly to the meter.