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In Reply to: RE: Hand in pocket? posted by AbeCollins on August 01, 2016 at 17:54:58
Of course the idea is not to give the charge a path to ground through the body.
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I saw a guy get shocked through the nuts once. We were learning basic electronics in the USAF (early 70s) and the task was to check power supply voltages. My lab partner was touching something he shouldn't have been touching and was leaning against the metal workbench. Current found it's way to ground from his finger to his crotch which, even though he was fully clothed, was making contact with the bench.
Man that was funny.
See, I wasn't completely off base. Like I said, I put my other hand behind my back. ;-)
..where the heart resides...Your first high voltage/high current shock can easily be your last. A bad shock across your chest can "stop" your heart...
The current in a preamp is USUALLY not lethal. However, anyone can get their body parts "locked up" in the wrong position during a shock and incur serious damage. This is why certain testing methods should always be utilized. With our hands, while testing high current voltages, wearing well insulated GLOVES is in order. Not cloth or latex gloves, mind you; try quality leather, pig skin or deerskin types which do not have any holes or cracks in the gloves.
Even high voltage certified gloves (as used in electrical and electronic industries) require checking for cracks before each use and they always have a limited voltage/current and usage time-span approved. After that time expiration, they might become very dangerous to use...
While any body part in contact with the chassis under test can be potentially shocked, make sure none of your body parts can become the conductor of any electrical or electronic energy. You can look but you can't touch....
I understand the risks and precautions. I've been tinkering with HAM radio and electronics since I was a kid, including RF power amplifiers with high voltage on the plate element. ;-)73
Edits: 08/02/16
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