LB:
Normally, a 1600 amp, 120/208, 4 wire, would fall out like this:
4-4" PVC
4 sets of 600mcm THHN/THWN Cu
MCB 1600 amps
500's don't fly as 380x4=1520 amps
Largset MOCP would be 1500 amps IF avail.
Now, AL would start at 750MCM
As to VD calcs, the linked calculator does not provide input for parallels.
Basic VD calcs are in American Electricians Handbook, & are not that tough to do.
BTW, is the job 'design build'?? or do you have a 'spec' you're trying to re-engineer.
Basically, be careful!!
John
PS, if you can't locate the formulas, drop me an e-mail
