I can't tell you how many times I have had to run new conduit because the contractor used the minimum size and it won't allow three # 12 thhn conductors. I don't blame the contractor I blame whoever is in charge. Planning is always a great idea. But then the guy or gal in charge is never the one running conduit in the ceiling of the un-airconditioned power plant in July! If they did it just once they would always allow for future use.
