A definite "NO"; it appears that there is insufficient room to "work" on the conductors within the box. It also appears that a "stubby" screwdriver might fit. Now, who was there first? the sparky or the duct man??? I don't know to many sparkies that would bust there buns to put a box in a spot like that. So when the AHJ comes in for inspection, who fails??? the sparky of course; anyone ever see a tin knocker get a red sticker???
Arseegee: During a total rip out of a 25kSF lab/office, happened to notice a "funny" Seems the sprinkler fitters had a HVAC duct in there way in a corridor ceiling; well, they went in one side, and out the bottom (nipples & elbow) & put the head on. (Nice tight holes) Guess the old addage "drop ceilings hide a multitude of sins" holds true. Fire Marshal thought it was "cute". John
Where do we draw the line with the accessibility rules? The receptacles required at kitchen counters do not meet these rules. What is "equipment"? Are junction boxes covered by 110.26. What if it is just a pull box and there are no connections in it? Don