Re: [RE-wrenches] Fwd: Grounding on a glacier??

[Todd Cory]

I have heard that this requirement (to bond negative to ground) as well as bonding one of the AC conductors to ground (neutral wire) was pushed through by wire manufactures and unions. The wire manus sell more of their product and the electricians get more labor in installing them. I also agree that grounding any live conductor actually makes the system less safe. When I have traveled over seas, I always try to open the main panel to see how things are laid out. They never associate one of their power conductors (usually 240 v) to ground. Todd Matt Tritt wrote: As long as we're already on the subject, BESIDE the NEC requiring it, why is it that we have to bond the ungrounded conductor on the battery side of a DC system??? I believe that we are the only country in the world that has this requirement. As long as all the system cabinets, mounting plates, housings and etc are grounded, what is gained by including a battery conductor? I'm not talking about HV inputs from an array, just the battery busses. I have been asking this question since forever, and the only explanation seems to be the recital of the Code. Obvious problems can occur when there is a + grounded piece of equipment in the mix, since - well, it's obvious. Matt T

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