Electure, I explained to the plant engineer that the larger size conduit does not mean that I can fill it all the way up. He wants to use it for "future expansion" but I told him about the code making me derate the conductors after 4. Anyway, I did everything legally, they just ended up eating alot of wire cost because I had to upsize the #12's to #10's and the #10's to #8's. Thanks for the input!