Unfortunately, Jon, the #6 Al I gave in the example is going to be #8 copper (the largest I can go to get 4 ckts in the 1 inch PVC left out thru the slab of the large mall store by another company) or I would use #6 CU. Maybe I'll look into "superconductors" (LOL).
This is one of the drawbacks of the multi-contract, multi-electrical-sub nature of mall developments. Coordination between entities is essential, yet lacking. All the elec sub who is doing the big box store did was look at his panel schedule and see the four 30A ckts, size his stub-out for nine #10 copper wires, and put in a one inch stub out. He has no site plan, that is our work, bid on and started months before he ever came on site with his contract.
