On 08/24/2012 02:07 AM, Anne Wilson wrote:
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On 23/08/12 16:41, Maurice Batey wrote:
On Thu, 23 Aug 2012 09:08:59 +0200, Morgan Leijström wrote:
Metal tools give much stronger discharge than fingers. But a
reason to avoid toucing is to avoid contaminating around pins
with sweat (salt, acid), fat and other dirt.
Agreed! But in the context of my reply I was trying to avoid a
lengthy description of the usual advice list, which can be found
on the 'net, but just to mention one of the main dangers.
Living in the UK I have a different method. I have a "power" lead
that has no power connection. Our electricity wiring is generally
3-wire, live, neutral and earth. The lead I use when working has only
an earth wire. Plug it in to the mains and the case is earthed at all
times, so I regularly touch the metal case in case of any build-up.
Since I don't get any feeling of shock, I assume that I never get to a
dangerous point of static :-)
Anne
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This sounds similar to my method. Having assured myself that the 3-wire
lead (in U.S., aka power "cord") is actually connected to a grounded
(earthed) circuit, I switch off the power supply, which disconnects the
live wire. I might push the ATX power button, which will spin the fan a
few turns when the machine has been powered up recently, indicating to
me a discharge of some residual potential from capacitor(s), I guess.
Then, I periodically ground my IT corpus to the computers metal frame,
especially before handling the component of my attentions. :)
Rolf
