HUGE conductor size increase based on OCPD rating

[tkb]

Sorry for the confusion, I meant 4CCC per phase, 4 sets of ABC phases and I used three conduits.

What size are are conduits?

 

[jaggedben]

I dont see where the OP said the eqpt needs a neutral, and isnt it permissible to run AAAA, BBBB, CCCC in 3 conduits?

....

Only with non-ferrous raceways.

 

[Smart $]

Only with non-ferrous raceways.

...and underground plus comply with provisions of 300.20(B).