Electrical Engineering - Re: Yet Another 120 vs 240 (was: Why has Romex wire gotten so expensive?)

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Re: Yet Another 120 vs 240 (was: Why has Romex wire gotten so expensive?)

Roy L. Fuchs

2006-06-24, 5:25 pm

On 24 Jun 2006 14:29:04 +0200, "ELAL" <spamhere@elal.tk> Gave us:

>And 42 is not only the answer to life, the universe and everything, it's
>also generally regarded as THE voltage limit, where human contact won't
>result in a lethal current in ANY circumstance. With everything over
>42V, _avoiding_ contact should be the #1 priority!

You got it wrong. It is 42 mA.

In a closed body, a 42mA current can fibrillate the heart.

In an open body, heart DE-fibrillation is done at 2mA levels with 2"
paddles. It's all about the current.

AGAIN, current is the main factor. A 5000 volt power supply that is
limited to 1uA current will not harm anyone, even those an arc from it
might not feel the best to the person receiving it. That 5000 Volts
got clamped to near zero at the onset of current flow in the completed
Supply/Man circuit.

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