In article ,
xena wrote:
"Harry Bloomfield" wrote in message
...
on 04/07/2007, Dave Plowman (News) supposed :
It's got more than enough oomph to kill anyone, if 240 will kill a
horse.

With a human, a few watts are enough, and these are capable of
hundreds.

1mA at 240v is enough to kill a human - animals are supposedly even
more sensitive.

I don't get this leccy thing at all. 12v doesn't hurt if you touch both
terminals. My electric fence at 8,200V (yes 8.2KV) stings a bit but
doesn't kill, yet somewhere in the middle, 1mA at 240v can kill??

The current flow in amps depends on two things - the voltage and
resistance.
V
The formula is I (amps) = -
R

So if you increase the voltage or reduce the resistance the current
increases.

The electric fence will have a large value resistor in series with it to
limit the maximum current to a safe value.

Your skin when dry has quite a high resistance. Try putting the
terminals of a PP3 (9 volt) battery across your tounge. You'll feel
that. ;-)

--
*Drugs may lead to nowhere, but at least it's the scenic route *

Dave Plowman London SW
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