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earthing


weknowthewor

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a 3 pin socket, Live, Neutral and Earth.

the Middle one is the Earth (even in America).

 

with a multimeter on the AC setting (at the correct Voltage setting also) you can test from this center pin to either of the other 2.

one will give you your line voltage (120 or 240 VAC) the other will give you Nothing at all beyond a few mV.

anything above a few Mv and you have an Earth leak.

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