1. From secondary of utility xfmr, we run 4,000A bus duct through wall and drop on top of main switchboard (480V/3PH, 4W+G), is there a min. requirement for distance from bust duct to floor?
2. Same above question for conduit bank height... if we group several conduits in one conduit bank and run through wall from elec. room A to elec. room B?
2. Same above question for conduit bank height... if we group several conduits in one conduit bank and run through wall from elec. room A to elec. room B?