I understand the inspection issue but if you know they are spraying foam, you will see the violation coming at the rough. Since the holes have to be draft stopped, those will be obvious. I suppose the question is what would constitute "spacing" in these penetrations? If you just pushed the RX apart and jammed something in between them,(Romex jacket, stick of wood or whatever)is that spacing?
Certainly if the EC had collected some pieces of duct board, left over from the HVAC guys and jammed some in between RX in the holes, he has met the intent of the code assuming there is any wiggle room at all.
You should be drilling more holes anyway if you have that much RX in one hole. I guess the issue comes up most right above the panel where you have a whole bunch of cables in the same spot. That has always been troubling, one way or the other. Again, as long as each cable has some space around it when they pump in the foam, no problem as I see it. It is only when they are "installed without maintaining spacing" that 334.80 comes in.
