DIY How To

DIY Projects - Wiring a plug

Electrical appliances are usually supplied with a fitted plug, but there could be times when you need to fit or replace a plug.

Plug top Remove the cover of the plug by undoing the large screw between the pins. When you look at the plug with the flex grip at the bottom, the large pin at the top is the earth (marked E or Earth) the live terminal is on the right (marked L and may have a brown coloured insert) the neutral terminal is on the left (marked N and may have a blue coloured insert)
Strip flex Prepare the flex by removing about 43mm of outer sheath with a sharp knife taking care not to damage the insulation on the inner cores. Cut the Live and Neutral cores to a length of about 26mm. Remove about 10mm of the insulation from all three cores and twist the loose strands neatly together. If the live terminal is on the left of the fuse the live core will need to be cut slightly shorter.
Plug top with clamps If the plug has the clamp type terminals, remove the clamps, wrap the wires around the terminal posts in a clockwise direction, replace the clamps and tighten them with a small screwdriver to secure the wires. Sometimes the live terminal is under the fuse so the fuse will have to be removed before wiring that terminal.
Plug top with holes If the plug has screw hole terminals then double over the strands, insert them into the terminal holes and tighten the terminal screws with a small screwdriver to secure the wires.

Make sure the plug is neatly wired, the insulation goes right up to the terminals and that there are no straggling wires. Check the appliance rating and make sure the correct size fuse is fitted. Fit a 3 amp fuse (red) for appliances up to 720 watts and a 13 amp fuse (brown) for appliances from 720 watts up to 3000 watts (3 KW)

It is also important to make sure any plugs in use, have the live and neutral pins insulated as shown below

Plug top with insulated pins

The insulated part stops the conductors being touched, whilst the plug is being inserted or withdrawn from the socket. Any plug tops not having insulated pins should be replaced as soon as possible.

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