On Fri, 5 Mar 2004, Jinx wrote:

> > Any competent installer would have a 'neutral detect' and 'lurch'
> > switch to detect and prevent this exact situation.
>
> The dangers are appreciated.


  At 20 I was a tehnician, working at a plant factory and studing in the
same time. All automations where powered up from a local acid battery
station, having 110V or 220V and almost 220 Ah. It was a huge room where
the elements (30kg) where connected in series. One of the biggest problem
whas the accidental shortcircuit of one of the poles to ground. Why ?
Because if one pole was grounded, another scurtcircuit to ground of
the opposite polarity circuit could produce firing. Of course the
accidental grounding was checked by a supervising meter. In one day I was
searching for such a damn shortcircuit. It was very hot, about 30C inside
and all automations closed in some big metal cases.
With my right shoulder firmly on the metal case (grounded and +110V),
I have touch accidentaly a relay socket with my arm (-110V).

  I can't explain the feeling. But is fresh in my mind after 20 years.
Nothing is the same like a good, no ripple, "infinite output power" DC
shaking !

best,
Vasile

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