you have a transformer inside the blding and you create a separately derived system(480-208 step down ) you run the ground wire from the primary and secondary to the chassi and the bonding elecrode from the xo to the chassi and on to blding steel. do you bond the neutral to the can at the first means of disconnect. if so, doesnt this create 2 paths to ground?
i agree that you are creating a parallel path to ground. this was explained to me many years ago by an inspector who stated you can bond it at the xfmr or the first means of disc but not both. none the less my boss insists he has " done it that way all (his) life". he then tried to find it in one of his electrical books and after 5 minutes said " it won't make any difference so do it my way".
Re: bonding the neutral#35673 03/19/0407:03 PM03/19/0407:03 PM
maybe ive been told incorrectly but i was told that the ground wire from the service is connected to the chassie not the xo. and that the bonding electode should be grounded to the chassie on its way to the xo. i would think a ground fault could travel back to your bonding electode via the neutral or the ground wire thereby having 2 paths to ground.