Bill:
This is probably true, however it is a single enclosure and the recomended way is to pipe it or use greenfield. As far as i can tell the plugs inside are to facilitate removal of a bad element. ie fan or heater etc.
It is recomended for a 20 amp circuit because of the heating element.
My point was that in MY area, here in Ohio and I believe that is what I said, we must adhere to 300-3(b).
I have done it this way in new construction and snaked it through walls in old construction.
