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USA uses 60HZ 110-120VAC RMS...
This means that the root mean square of the sinusoidal wave that carries the current in our wiring is 110-120V.
60HZ means that the polarity of the electricity goes from positive to negative and back to positive 60 times a second.
Across the pond, they use 220VAC RMS and at a frequancy of 50HZ; twice the voltage but, a slower waveform.
Why? I have not a clue. But I like 60Hz.
-SF
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