I want to install an electrical subpanel in a 2nd floor room, but am a bit confused as to the location requirements. I would ideally like to place the panel behind a door (e.g. a door opens into the room and when open would be in front of the best panel location). This would put it about 1.5' from that door when closed, with many feet of space in front and to the left.
Also, is there a minimum height requirement? I would seek to put it around eye level, but there are some roof joists tied into the wall studs at about 4.5 or 5' and I think I'll have to go lower. Any reason I can't have the top of my panel at about 4' (other than it's a bit unusual)?