[Gllug] Re: [Gllug] PSU fans

[Xander D Harkness]

Current is the killer.  It must also travel across your chest (heart)
frying you thumb between two connectors is not sufficient ;-)

I believe that it only requires about 20mA to kill.  Why we do not die more
easily is that we have quite a high resistance as long as we are not
sweating profusely etc.

Cheers
Xander

> I thought that the killer was current not voltage or power?
>
> Matt
>
> ----- Original Message -----
> From: jackson harry <postituk at yahoo.com>
> To: gllug at linux.co.uk
> Sent: Fri, 7 Sep 2001 10:26:51 +0100 (GMT+01:00)
> Subject: Re: [Gllug] PSU fans
>
>> --- Alex Hudson <home at alexhudson.com> wrote:
>> >
>> > I don't know whether this is just me, but there is
>> > something about tinkering with power supplies that
>> > just doesn't sit right.. oh yes, that's it, it's
>> > because they can kill you :)
>>
>> The danger from the power supply is not the residing
>> voltage in the capacitors but the chance that you may
>> damage it and short to the chassis, if no earth was
>> apparent and sitting on highly resistive carpet it
>> would create a great big 240v live metal thing that
>> the children should avoid. The resident voltage in a
>> tv is because of the CRT and the fact that some of the
>> capacitors are charged to 27000 volts. I have seen
>> someone get a belt from an HT lead connected to  CRT,
>> it did not kill him but he did not pick his nose with
>> that finger for a while, he cleared 8 feet in a bout
>> .25secs.
>>
>> >
>> > Seriously, make sure you turn off that power supply
>> > at least a day before you're going to take a
>> > soldering iron to it in anger. They're much like
>> > TVs.. resident charge. Nasty voltages :(
>>
>> Anything with anything capacitive will have a resident
>> charge I am unsure as to how much a 300W one would
>> have but I do not think that it will be overly much.
>>
>> On a serious note if you are unsure at all do not
>> touch the power supply its the one that will kill you
>> and it is also the one that will kill every component
>> in your PC you decide which one is more important.
>>
>> HARRY
>>
>>
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