Wiring a plug is not difficult but you would be surprised how often people get it
wrong. A wrongly wired (or fused) plug puts everyone at risk from electric shock
Eight simple steps to a well wired plug:
1. Strip off the outer cable sheathing to expose about 4cm of the insulated wires.
A craft knife or a pair of cutters is useful for this. Use this to slit the outer
insulation, taking care not to use too much force as this may damage the inner wires.
Pull back the outer insulation and cut it off.
2. The inner wires may be twisted, so separate these out. Cut the Live (brown) wire
and the Neutral (blue wire) so that they are about 3 cm in length. This will make
them about 1 cm shorter than the green/yellow Earth wire.
3. Remove the insulation from the inner wires to leave about 5mm of exposed metal
core on each wire. When doing this, take care not to cut into the individual strands
of wire. Twist the strands of wire together neatly.
4. Connect the wires to the correct terminals. The brown Live wire to the terminal
on the fuse holder marked L, the blue Neutral wire to the terminal marked N and the
green and yellow Earth wire to the terminal at the top of the plug marked E. Class
II appliances do not have an earth wire because they are double insulated (Usually
marked with a double box symbol).
5. Fit the exposed metal core of each wire through each terminal and tighten the
terminal screws. Ensure that the insulation reaches right up to each terminal and
that there are no loose strands of wire.
6. Fit the flex firmly into the cord-grip making sure that the grip fastens on the
outer insulating sleeve of the flex.
7. Read the instructions on the appliance to see what rating of fuse is required
and fit the correct fuse in the plug. If the instructions are not available, use
the gauge of mains flex used and the power rating of the appliance to work out the
8. Fit the plug cover making sure that the inner wires are lying in the right channels,
and do not become crushed when the screw is tightened.