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BS 1363 British Plugs and Sockets
Annotated display of various types of British BS 1363 plugs and sockets
The neutral and line slots are protected by shutters, which are opened by insertion of the longer earth pin. From 1984 line and neutral pins must have insulating sleeves (black sheaths) to minimize the risk of a shock when pushing the plug in. Therefore, should the cord grip fail to do it's job., the first wire to come loose is the brown line, followed by blue-neutral and lastly earth.
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