How to Wire a Plug
Leads fitted to equipment must now comply with modern colour coding system: brown-live, blue-neutral, green/yellow stripe-earth. This replaces the old system which was red-live, black-neutral, and green-earth.
On a three-pin plug with the cover removed, the earth pin is the larger of the three pins. The live is on the right-hand side of the plug, the neutral is the pin located on the left-hand side.
On a fused plug one of the fuse clips is on top of the live pin, the other carries theterminal to clamp the wire.
Do not use an old plug with a cracked plastic base or cover. When the wire has been fixed in, it must be clamped using the clamp andprovided with the plug. This prevents strain on the wire at the terminals.
Some equipment is supplied with moulded two-pin plugs. This can be connected into a two-pin adaptor. Make sure that the equipment has its own fuse first. If not, remove the two-pin plug and wire it into a three-pin plug with a 3A fuse. In this case, the earth pin will not be used.
Do not overload a supply point by having a ‘Christmas tree’ of plugs, or connect equipment by poking wires into the socket.
If a three-pin system is used, heating appliances must be connected to the 15A plugs, and so on, lights to the 2A or 5A plugs.
When stripping wire prior to fixing a plug only remove enough insulation to fit in the terminal. Ideally a pair of wire strippers should be used. Make sure that the wire does not become nicked.
Wires should never be knotted to prevent them from pulling. This places undue strain on the insulation which can crack. Use the plug’s cable clamp. If in doubt, buy a new plug.
10. November 2011 by admin
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