I think the post asked about using a plastic box on the outside of a house where the brickie would come by later and install a veneer of brickwork. He wanted to know if the brickie would install the box correctly. (i.e. flush, securely, etc.)
I have done this, but I always use steel boxes hanging on the tails of NM poking out at the approximate locations of the devices and fixtures. The mason will install the box in the closest course of brick or block.
The wet location is outside of the masonry, the NM entering the back of the box is dry, nor is the NM imbedded in the mortar. Wet location fixtures and WP covers on devices are required for the finish to keep the wires inside the box dry.
I suppose plastic boxes are OK, but I don't know if they are listed for imbedment in mortar and brick.
