..George, can you please elaborate on the problem you stated about running a ground wire in the same conduit..this sounds interesting...Thanx, Attic Rat..
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Simple system, tough to get your mind around. Your system can "shoot grounds" and still work perfectly well while being damned dangerous, wierd, huh?

If you're foolish enough to pull a ground wire in a pipe with your ungrounded conductors, your not gonna like what you get, even though it sure feels like you are complying with the code, it makes the situation extremely dangerous. That's about the worst thing that can go wrong


.."if it ain't fixed,don't break it...call a Licensed Electrician"