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(AU) Crabtree 5A Plug & GEC (?) Socket
#163903
05/20/07 05:02 PM
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Joined: Oct 2000
Posts: 3,636
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Re: (AU) Crabtree 5A Plug & GEC (?) Socket
[Re: Admin]
#164027
05/23/07 11:25 AM
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Joined: Aug 2001
Posts: 7,520
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They're typical of British fittings of the 1940s/1950s era.
I mentioned elsewhere the possible switch interlock to prevent a switch being turned on until a plug was inserted, but there were definitely outlets which when mated with the correct plug did the opposite function, i.e. prevented you from removing a plug with the switch on. The recesses in the earth pin of that plug provided the function.
In the "old days" here, our Regs. specified that outlets on a D.C. supply had to be controlled by an integral or adjacent switch. There was no such requirement for A.C. outlets.
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