Getting back to the original question, I don't think a cord connector in a 1900 box meets 210.23(H)(1) (pendant boxes)
(1) Flexible Cord. A box shall be supported from a multiconductor cord or cable in an approved manner that protects the conductors against strain, such as a strain-relief connector threaded into a box with a hub.
That was why I asked if a Bell box with threaded entries and the appropriate strain relieving connector, would fill the bill.
