Three wires in a plug

The fuse breaks the circuit if too much current flows. This should grip the cable itself, and not the individual wires inside it. You should know the colour coding for electrical wires and the function of each wire.

A mains electricity cable contains two or three inner wires. Only two of the wires are used when the appliance works properly.

These are the live (brown) and the neutral (blue) wires.

The neutral wire completes the circuit and carries .

Each pin must be correctly connected to the three wires in the electrical cable. Gently twist the strands of copper wire with your fingers until each strand is tight. Remove the plug cover by either snapping or unscrewing it. A -pin plug consists of three pins (hence the name). The -pin plugs are designed so that electricity can be supplied to electrical appliances safely.

Each wire has its own specified color, as shown above and each pin must be correctly connected to . Inside the plug are three terminals: Earth : This is where the green and yellow wire goes - however, double insulated appliances do not have an earth wire. Live : The brown wire goes to the live terminal, which is on the right of the plug. Neutral : The blue wire connects to the neutral terminal on the left of the . They are designed to ensure safe supply of electricity to. Nowadays most appliances are sold with moulded plugs already fitted. It is also the case when you bring in equipments overseas.

British Standard compliant adaptors are not always . The inner wires are colour coded and have different functions: . The key is to make sure you connect the wires to the proper terminals in the plug. The wide prong on the plug links the . Most nongrounded appliances are double-insulate which means that there are two layers of insulation between any live wires and any metal parts within the . These basic principles can be applied to wiring plugs from other countries, only the colours are different. A correctly wired three -pin mains electricity plug is important for using electricity safely.