Since most load centers are 4", and 2" LB's cannot be used for 4/0, wouldn't feeding from the back of a LC mean the you are going to have to turn the corner 90 degrees upward with the 4/0's and violate the turning radius req'mnts?
I was told that I had to use a 6x6x6 to turn the corner with 4/0 (or a 2 1/2 LB with reducers in it) so that the turning radius of NEC would be satisfied.
