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Article #91

Re: is third transformer hole an earth?

#91
From: Peter Hucker
Date: Tue, 11 Nov 2008 18:56
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On Tue, 11 Nov 2008 18:32:56 -0000, Whiskers <catwheezel@operamail.com> wrote:

> On 2008-11-11, Peter Hucker <none@spam.com> wrote:
>> On Mon, 10 Nov 2008 21:48:40 -0000, Whiskers <catwheezel@operamail.com> wrote:
>>
>>> On 2008-11-10, Peter Hucker <none@spam.com> wrote:
>>>> On Sat, 08 Nov 2008 22:16:47 -0000, Whiskers <catwheezel@operamail.com> wrote:
>>>>> On 2008-11-08, catchme <someone@somewhere.net> wrote:
>>>>>> john downie2 wrote:
>
> [...]
>
>>> - but it isn't the Watts that really
>>> hurt, or even the Volts; it's the Amps you really need to be careful with.
>>
>> It's both.  1 billion amps at 0.5 volts definitely won't do you any harm
>> - mainly because you have too much resistance to conduct 1 billion amps
>> without a much bigger voltage.  I'd actually go for the watts being the
>> best measure of danger (but you have to take into account how many watts
>> you will dissipate, not how many are available).  I can draw 5kW off a
>> decent car battery into an invertor to power mains appliances, but if I
>> touch the two terminals, I feel nothing, and I certainly don't dissiapte
>> 5kW!
>
> [...]
>
> You can touch the 12V battery terminals reasonably safely, but don't try
> it with the 240V terminals.  That voltage is well in excess of the body's
> 50V limit for being a non-conductor, and the battery can deliver plenty of
> Amps to be lethal.  It isn't the 240V that kill, it's the 21A.
>
> Turning fresh meat into smoke and ash can dissipate a great many Watts.

But if we compare 110 volts and 240 volts, 240 volts will dissipate far more power in you.  Both supplies have enough amps to give your body what it will conduct.

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From: "Peter Hucker" <none@spam.com>
Newsgroups: sci.electronics.repair,24hoursupport.helpdesk
Subject: Re: is third transformer hole an earth?
Date: Tue, 11 Nov 2008 18:56:10 -0000
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