On Apr 7, 6:38*pm, wrote:
On Wed, 7 Apr 2010 12:31:47 +0000 (UTC), Jules Richardson





wrote:
On Tue, 06 Apr 2010 22:07:33 -0400, clare wrote:
As for safety - AC and DC are relatively * equal as far as shocks are
concerned - if *12 *volts DC does not give a shock, 12 volts *AC won't
either. *The only difference is *a *DC shock is a "single *hit" while AC
is a "buzzzz" WHich is more dangerous? Since *AC hurts more, I'd say DC
is the more dangerous - easier to ignore??????

Lots of old railroad engineers have told me that DC was far worse because
it can make muscles contract - and then you can't let go of whatever it
is that's causing the shock. Whether there's truth in that, I'm not
sure...

I don't know how many 240V AC shocks I've had over the years when I lived
in the UK, but certainly quite a few. I'm yet to get zapped by US
power... :-)

cheers

Jules

*The DC muscle contraction is true - when the current gets high enough
to cramp your muscles on AC it reverses and you have a chance to let
go -


How the hell can you have time to let go when the whole AC cycle is
1/60 of a second, the amount of time the voltage is close to zero,
being but a small fraction of that?



On DC it is *constant polarity and your muscle never relaxes.- Hide
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