There's a new MCC that I was working in recently, and I noticed that the contractor that installed it had run (2) 2" conduits into the MCC from an overhead trough. One conduit had A Phase and B Phase in it, and the other conduit had C Phase, a neutral, and a ground in it. I'm pretty sure this is a violation, but I'm not sure exactly where to look in the code book to verify this. Can anybody point me in the right direction? Thanks in advance.