Ampthill Electrical Services

Fuse Boards

A fuse board or its modern name of consumer unit is at the heart of any electrical installation. Consumer units have numerous benefits over older models which lack the safety features of a modern consumer unit.

New domestic consumer units do not contain fuses, but Miniature Circuit Breakers (MCBs). Their purpose is to protect the wiring of its circuit due to excessive current, due to an overload or a short circuit fault. If the rated current is exceeded, the circuit breaker will trip, and only needs to be switched on to reset the power. It is thus more convenient, more accurate and obvious as to which circuit has tripped. They also cannot be loaded with the wrong sized fuse wire, a common mistake which can lead to serious problems.

Residual Current Devices (RCDs)

Consumer units are also equipped with Residual Current Devices (RCDs), sometimes called earth leakage circuit breakers, and are primarily designed to protect against electrocution, by detecting current flowing to earth. Because under normal circumstances the current flowing to earth is very small, they can be made very sensitive, 30 miliamps is common. This sensitivity enables modern consumer units to detect faults which an old rewireable fuseboard could not detect. RCDs trip under fault conditions in under 0.04 seconds, which can mean the difference between life or death in the event of an accident.

As our homes fill with ever more electrical appliances, with the increased load it is even more important to provide the best protection for your home and occupants.

Your complete electrical installation is tested and inspected as required by BS7671 by us, before and during reconnection. All the results are recorded on an NICEIC Installation Certificate. The work is then notified by us to the NICEIC who then issue you with a Building Control Compliance Certificate via post to the home address.