Got a 75KVA 480V xfmr needing to go in a tight spot. Q- clearance in 110.26 151-600v . Got my xfmr sitting across an aisle from a branch panel, the top of xfmr housing is some distance lower elevation than the bottom of branch panel with nothing on wall below panel , therefore this would not be a condition 3?(exposed on both sides) I’m supposing the key phase in 110.26 (1) is "in the direction of live parts" Also is there anything to prohibit mounting a disconnect on side of Xfmr if disc is supplied by said xfmr and meets clearance requirements?
