[Jewelry making - Article 01308] - Re: [Orchid] Anodzing Power Supply

[James Binnion]

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Hi Brian,

    The answer you got is not quite the whole story. The current coming
    into your house, studio etc is referenced to ground. This means that
    if you take a voltmeter and  touch one probe to a grounded surface
    and one probe to a hot lead you will read the line voltage. If you
    you were to be unfortunate enough to touch both a grounded surface
    and the hot lead you would be shocked and possibly killed.  Now if
    you take the volt meter and  read the output lead of an isolation
    transformer and ground you will see no voltage indicated this is
    because the output is isolated from the mains via electromagnetic
    induction and there is no current path established between ground
    and the isolation transformers output. If however you were to
    measure between the leads of the isolation transformer you will see
    the full mains voltage and if you were to contact both leads of the
    isolation transformer you would indeed be shocked. It will not
    prevent you from being electrocuted it only lessens the likelihood
    because it is not referenced to ground and you need to contact both
    leads not just one to get a shock. 

Jim

James Binnion Metal Arts
Phone (360) 756-6550
Toll Free (877) 408 7287
Fax (360) 756-2160
http://www.mokume-gane.com
jbin AT mokume-gane.com
Member of the Better Business Bureau

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