Comment by timerol
4 years ago
> I traced it down to the several KA welding pulse that caused the ground fault interruptor to be EMP’d. Running the welder without ground took care of that.
That's a solution, I suppose. Not one that I would pursue, but I'm glad the author got the pack welded without any injury.
I know my way around electrical stuff, not having ground on the welder was ok given the work place setup, but agreed that if you are unsure about the possible consequences that you shouldn't do that.
Ironically, the only time I ever really got zapped was when I was connecting a scope to what I thought was the ground terminal of a very large high voltage power supply. The only slight problem was that it was a positive ground system...
Kind of strange that they build scopes with ground tied to mains earth, as it is the source of so many problems and hazards. Letting the entire thing float would be the proper solution.
That's because the metal case can go live if there is an internal short. That's what that protects against. But agreed, that really caught me out. I had a blind spot for days due to the afterimage.
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