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Thank you! A nice explanation. In the greater scheme, I suppose

the chances of a metal cabinet powering up, and your body's resistance to ground being low enough to cause fibrillation, are remote, but why take a chance?

A personal experience highlighted this danger to me. A carpenter on a job I was on was using a skilsaw (the old metal-bodied style) while standing on a scaffold. His saw shorted out, and because his arm and hand muscles contracted from the current, he could not let go of the saw. Finally, in desperation, he jumped off the scaffold, the cord hooked on the way down, and the saw came unplugged. There was no one around at the time-if he had not been able to stop the current, his heart would have fibrillated, with potentially dire results. For me, lesson learned.


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