Voltage Drop limited to 3%

[bob]

My experience tells me that after the system is up and running normally, the VD using the 500KCMIL AL will be at, or less than 3%. But that's just my opinion.

I don't see how you can make that statement given the loads that were submitted by the OP.

VD using 2-500's and 2-4/0's results in a VD of 4.5%. Apparently that is to high for the OP's design

 

[mivey]

I don't see how you can make that statement given the loads that were submitted by the OP.

Because he is running the voltage drop at 480 volts while the OP said 208 volts. Kingpb just hasn't realized that. Yet.

 

[mivey]

...Code only requires that we limit to 5% overall.

What code? This is not an NEC requirement, just a unenforcable "suggestion".

I think that's what the groups consensus is.

What group? I'm not sure you would have that consensus here, at least about it being a code requirement.

I may start using 85% PF in the future.

Not a bad idea for a guess. Don't forget temperature adjustments also.