A fuse within a ceramic cylindrical body which is pushed into a fuse holder. Used in older type consumer units, fused sockets, 13amp fused plugs etc. If the fuse blows, the cartridge is replaced. See [..]

A circuit operating at less than 50v a.c. or 120 V ripple-free d.c. via a step down transformer from the mains.

The type of mains electricity used in the UK having a cyclical current waveform. Normally used in UK houses at 240V (RMS) alternating at 50 times per second (50 hertz).

Unit of electrical current. Either how much electricity an appliance will use, or a circuit (fuse, mcb, cable, connectors etc) can handle. Fuses are always rated by current as are cables. Each applian [..]

The process by which all metal parts in a buildings are electrically connected together and then linked to a real earth. This is done to prevent any metal component within a building becoming dangerou [..]

Part P of the Building Regulations covers the installation and modification of electrical wiring - applies to England and Wales. see Part P.

Used to route and control power around a property - see Twin and Earth and Three Core and Earth.

The initials "CE" do not stand for any specific words but are a declaration by the manufacturer that his product (which can range from Stuffed Toys to Electrical equipment) meets the [..]

The ceiling fitting above conventional lights. Inside they usually function as a junction box for the wires from the switch. Care needs to be taken when working on them as they contain live wires even [..]

A switch like device with a pre-set current limit used to protect a circuit from electrical overload. If the circuit breaker is activated (or tripped), it can be reset by pushing a button - however th [..]