>
> On Jun 3, 2010, at 5:01 PM, Michael Watterson wrote:
>
> Michael Watterson wrote:
>>
>> 110V AC is actually about 140V peak. Building sites here have to use
>> centre tapped earth 110V AC via certified transformer for safety,  
>> which
>> would be 70V peak to ground. (Household electric here is all 220V to
>> 230V AC 50Hz).
>>
>>
> These are of course only approximations.
>
> Actual exactly 110V RMS sinewave is 155.6 volts peak approximately  
> which
> gives closer to 78V centre tapped.
>
> It's the current that kills. So standing barefoot in salt water with
> soft skin wet with salt water grasping tightly a copper pipe connected
> to -40V is probably a lot worse than poking a 90V wire wearing dry  
> sneakers.
>
Actually the disruption of blood flow is what kills.  Hearts and  
brains do badly without
blood being moved about.
Gus
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