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RCD Testing

RCD's and RCD Testing

Whitehill Electrical offer comprehensive RCD testing and maintenance service. RCD's are also known as earth leakage circuit breakers (ELCB) or safety switches.

An RCD is an electrical safety device specially designed to immediately switch the electricity off when electricity ‘leaking’ to earth is detected at a level harmful to a person using electrical equipment. An RCD offers a high level of personal protection from electric shock. Fuses or over current circuit breakers do not offer the same level of personal protection against faults involving current flow to earth. RCDs have another important advantage – they reduce the risk of fire by detecting electrical leakage to earth in electrical wiring and accessories.

RCDs work using principal “what goes in must come out” principle. They continuously compare the current flow in both the Line (Live) and Neutral of an electrical circuit. RCDs are designed to operate within 10 – 50 milliseconds and to disconnect the electricity supply when they sense harmful leakage.


Electrician covering the areas of Leominster, Hereford, Herefordshire, Worcester,  Worcestershire