Winnie,
I am planning for each of the 4 ckts to have their own neutral. I did consider sharing neutrals, but don't want to. Some circuits are off all nite, so yes, some are off while others are on. I like the 480 volt idea too, but not sure if the ballasts will be multi-tap. Developer supplies these pole lites and I haven't checked the cuts on them to see. The other electrical sub won't want to supply 4 two-pole 480V breakers, and the switchgear package which was prob supplied by the large dept store chain won't necessarily have room in the contactor panel. Too many things controlled by other people in the whole scheme of this deal. I will do the math before I pull the wires in the 1" PVC, possibly I can downsize 2 of the ckts which supply light poles close to the bldg to #10 and get the others up to #6 copper. That would be (4) #6 and (4) #10 in a 1" PVC. Codebook is in the truck and I'm too tired to walk downstairs to get it, will check later.
