Electric Wiring, 3rd Edition

1 Wiring circuits simply explained

An electrical circuit is the whole path along which an electric current may

flow. This path may be divided into three parts:

1 The source of electricity (e.g. generator, transformer or battery),

which supplies energy to the supply terminals of the circuit.

2 The consuming devices, which convert the electrical energy into the

desired form, such as heat or light.

3 The wires and control gear, which convey the electricity from the

supply terminals on the premises to the consuming devices.

The simplest circuit contains three wires, one connecting the neutral side of

the supply to the apparatus, one connecting