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Old 3rd Oct 2012, 9:05 am   #9
Nickthedentist
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Join Date: Jan 2005
Location: Oxford, UK.
Posts: 15,817
Default Re: 13 amp plug question

Unsurprisingly, this question crops up a lot here.

What is remarkable though, is that the definitive answer has never been found; the reason for its presence seems to have been forgotten, even though it's only a shade over 50 years that square-pin plugs were introduced.

Nick.
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