To All:
I cant believe what I just read on a heat/vent/light/night light combo, at least in my area and in the code two cables run to this unit would be gigged immediately.
Via 300-3(b) all conductors of the same circcuit and where used, the neutral and all wquipment grounding conductors shall be contained with in the same raceway, cabletray,trench, cable or cord.,,,
12-4 or 12-5 MC works nicely on these units.
