Bjarney,
first off thanks for your answers.
They 240 CG system, with the bus ducts is is a totally different plant. Thanks for the explanation about the grounded conductor being fused for the motor loads.
The second post was a Machine shop with the 480V CG in the rear of the plant and the 208 3p 4 w under the same roof.
If you could, Could you elaborate on the "remote" 480v Ground circuit conductor. I haven't look into this yet, but I believe the ground electrodes for the whole system should come from the sub-station, should they not? And then the ground should "tie" into the building steel, the tranformer grounds should bond to the building and so on. Is there a schematic "drawing" that would show how to properly ground such a facility like this and where the ground electrodes should be found?
Thanks again.
