Prepare the plug and flex
Open up the new plug by undoing the screw on its base between the rectangular pins.
Inside there will be three terminals, a fuse in a holder and a clamp for securing the flex.
Hold the flex next to the clamp and note how long each of the wires will need to be to reach its terminal. Bearing this in mind, strip the sheath of the flex by the required amount and separate the conductors. Trim the insulation back on each conductor by about 1/2″ and twist its individual filaments.
Connect the wires to the plug
Connect the brown conductor to the terminal marked L or live. Connect the blue conductor to the terminal marked N or neutral. If you are fitting a plug to an appliance requiring an earth, you will have a green and yellow conductor, which should be connected to the terminal marked with an earth symbol or labelled Earth.
Double insulated appliances
If you are fitting a plug to a double insulated appliance (labelled with the double insulated symbol), you should not have an earth conductor in your flex.
Securing the flex
Fit the sheathed flex into the clamp (screw type or push fit) This secures the flex and reduces the risk of the wires being pulled out of their terminals.
Fitting the fuse in the plug
Check what rating of fuse is in the carrier. Most new plugs are supplied with 13 amp fuses. However, depending on the recommended fuse rating for your appliance, you may need to change this. Always use the fuse recommended in the instructions or detailed on the appliance. If no details are given, use a 3 amp fuse for appliances up to 720 Watts, and a 13 amp for appliances from 720 Watts to 3000 Watts.
Double check all your connections.
Replace the cover and fasten with the retaining screw.