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millner(at)me.com
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 Posted: Tue May 22, 2012 9:58 pm Post subject: Feels like voltage to me |
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Touching at the same time has nothing to do with the relative safety, or
foolishness. of this approach. You could touch one finger, wait 30
seconds, and touch the second without any increase in risk, or for that
matter, improvement in safety. In fact, going slower might just improve
the safety slightly... but don't do this anyway!
Paul
On 5/22/2012 10:10 AM, rayj wrote:
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I really have to ask. Are you making the claim that in all the years
"Sparky" used his fingers, He NEVER had his fingertips touch at
different times? Assuming 60Hz, a difference in contact times of the
the fingertips of 1/30 of a second would allow more than enough time
for any affect that was going to take place between 1st and 2nd finger
contact.
Never more than 1/30 of a second, ever.
I'm skeptical.
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Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
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| Posted: Wed May 23, 2012 5:06 am Post subject: Re: Feels like voltage to me |
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My dad told the story that when he was an engineer on the Westinghouse East Pittsburgh "Atom Smasher" around 1940--One day he was on a platform that suddenly became electrified. He was instantly shocked with about a million volts pulsing at microsecond charging pulses (and at substantial current!).
When he screamed for help someone cut the power. He kidded my dad, "What's the problem?...those were just microsecond pulses".
"Yes" said Dad, "But those were the most uncomfortable microseconds of my life..."
do not archive
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Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
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user9253
Joined: 28 Mar 2008
Posts: 1921
Location: Riley TWP Michigan
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| Posted: Wed May 23, 2012 5:09 am Post subject: Re: Feels like voltage to me |
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I have heard about navy electricians finding a blown fuse by using their hand as a voltage tester. Evidently ships have banks of exposed fuses on panel boards. The electrician would touch each fuse with his thumb and finger as he ran his hand along the rows of fuses. When he received a shock in his hand, he knew that fuse was bad.
I used a neon voltage tester at work on 3 phase 480VAC. If the neon light lit up when touching the 2 ends of a fuse, then that fuse was bad. Another test touches the top of one fuse and the bottom of the adjoining fuse. In this case, the tester should illuminate if all is well.
The same principle is used in automotive (or aviation) fuses that illuminate when blown. The LED that is in parallel with the fuse illuminates when the fuse is blown because it is in series with the load. If the load is disconnected, the blown fuse indicator will not work.
Joe
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jay(at)horriblehyde.com
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| Posted: Wed May 23, 2012 10:12 am Post subject: Feels like voltage to me |
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Correct; voltage does not kill, current flow does- ask any live line worker
--
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