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post #11 of 12 (permalink) Old 16-09-2011, 15:39
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But are the european type normally NOT switched sockets?
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post #12 of 12 (permalink) Old 16-09-2011, 19:51
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What concerned me was that some seemed to base their arguments on why polarity does not matter, on the misapprehension that line and neutral were identical and simply swap over 100 times per second.

On a conventional 230v AC system that is just not true.

The only systems I have come across where it is true, is so-called 110v AC power tool systems. I say so-called because they are in fact 55-0-55 volts systems that use a tool transformer with an input of 230v AC and a centre tapped output with 110v between line1 and line2 - so although you have 110v AC between the two lines, you only have 55 volts (RMS) between either of the lines and earth. These are therefore so much safer because the voltage between line and earth is only 1/4 of that in a conventional 230v AC supply.
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