Another Neutral/Ground/Bonding Question
there should be four wires between the fused main panel and your large sub panel. two are hots, one neutral and one ground. (the ground may be alot smaller than the rest)
You can have as many redundent grounds as you want, but they may not be "bonded" to the neutral at any other panel then the main.
The main bond is where the grounds and neutral are actually tied together with a wire, or metal bar. The redundent ground needs to tie to the ground bar, not the neutral bar, if it is in the sub panel.