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Old 10-06-2007, 02:35 PM   #16
Join Date: Jul 2007
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Thanks for the description of arc-flash.
I was once told a story of a guy who was doing some work on his car, and failed to remove the negative battery terminal first (for negative ground vehicles). While removing the positive terminal, his finger complete with gold wedding band got between the wrench and the frame of the car, thus causing a hefty are-weld to the ring, and permanently damaging the nerves in the finger. Ouch!
As you said, it's not just voltage!

Automobile batteries sold in the US state "High Voltage", when it is actually high current that is the danger, but most auto mechanics and owners wouldn't understand what "high current" means.

I have never had the experience of seeing an arc up close, but have seen them on utility poles during wind or rain storms.
I'd like to keep my experiences at a distance.



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Old 10-07-2007, 06:36 PM   #17
Join Date: Mar 2007
Location: Virginia Beach, Va
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I had an electric forklift once that arced when trying to recharge it.. Had sunburn on the face just from a quick flash.

Lockout, tagout or expect to be carried in a bag out the door once your fried medium well... No exceptions...

If your boss wants you to work on a circuit live.....

Look for a new boss......


Sammy is offline   Reply With Quote

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