Don:
I think I have finally described it correctly, as you said whether the two copper are bonding jumpers or not doesnt matter. Now back to my original question. The jumpers between these three panels do carry current, this is the way we are to tie the three of them together, I just dont like the idea of these conductors carrying current. When a Meter/Disconnect is used this is not a problem.
As with wiring to a separate building that has a metal piping system common to both buildings a 4 conductor must be run to prevent Neutral currents from flowing on the grounding conductor thus creating a ground-neutral voltage.
I would like to know too, how you got the proportions of the current distribution in the example you used ?
Thanks again
- Mark