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RE: buzz buzz buzz - I wonder why it does?
- To: <ukha_d@xxxxxxx>
- Subject: RE: buzz buzz buzz - I wonder why it does?
- From: "Nick Broughton" <mail@xxxxxxx>
- Date: Sat, 20 Apr 2002 23:06:35 +0100
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Keith
I
thought it was current that killed, not voltage? Static electricity
produces very high voltages.
W=AV,
so lowering voltage increases current to provide the same power to a
the
tool.
What
am I missing in this argument?
Nick
Yes.
All
electrical equipment used on building sites should be 115V maximum under
Health and Safety regulations.
They
even use different colour cable to differentiate
voltages
Yellow = 110V
Blue
= 240V
Red
= 415V
Even
things like Working Lamps are operated at 110V. Its a very sensible idea
when
all that water is about. Compared to using something directly powered from
the
mains ( 55V vs 230V ) any shock you might receive will be a quarter
of
what it would have been therefore a quarter of the current therefore you
will
almost cetainly live to go to work the next day.
Keith
www.diyha.co.uk
www.kat5.tv
> A site transformer is an
isolation transformer designed for use on a
> building SITE (guess
where the name comes from!)
> Because of the often wet environment
the
output is centre tapped and
> tied to ground. This limits the maximum
voltage to earth to half of
> the output voltage. Most shocks are
from
a single conductor to earth
> so this is an extra safety
feature
So do they expect everyone working on these sites to have
special 115
volt tools for the job? Or does this only apply to
designated
high power
devices that are more prone to "Accidents" then a normal
power
tool?
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