Greg
110.33(B) is in part 3 is in the over 600 volt section.
This room has several 1200 amp large 480 volt Mcc;s as well as panels.
110.27 (A) 3 in the 600 v & under section has something similar BUT I don't think it's an Exception to the Door at each end section. If it was then you could have a Ladder at each end and defeat the Purpose & reason for a door with push to release hardware to exit the room if burned or injured.
