I am wiring a 3 phase 4 wire 120/208 200A 42 circuit breaker panel tomorrow. I am going to use 3/0 copper and #6 for ground. I then started second guessing myself about the wire size. The neutral will not be counted towards the ampacity because it is only drawing the unbalance current. I dont have to upsize my 3/0 because of the more than 3 wire in a conduit rule right? Everything is going to be 120v single phase loads. Only using 14 circuits. As long as I balance my phases, I shouldnt have a problem with inspector.
thanks for your input.
Sounds good to me.