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Old 29th Jun 2011, 10:48 am   #4
Leon Crampin
Join Date: Nov 2005
Location: Surrey, UK.
Posts: 1,352
Default Re: Another unusual plug and some other questions

I have a dim recollection of a 3 pin 5A plug being made which was interlocked with the switch on the socket. When the plug was inserted, the switch would move to "OFF" and once switched "ON" the plug was locked into position.

This would explain the ramp and the notch on the earth pin.

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