A useful source:
https://worldofsockets.com

What is the best Power Outlet?
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[–] 21 points 1 year ago

The British plug serves the same point as an inset because there's a bit of non-conductive material on the plug itself that goes into the wall. If it's not fully inserted then the only thing showing is the non-conductive material.

It also has the thickest metal on the plug as far as I know. It's probably the only thing that the British have ever engineered better than the Germans.

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