Wiring Typesĭepending on where you live, the branch circuit wiring in your home will be made with individual conductors run through a hollow metal conduit, or with one of three types of cable. A cable is a factory-made assembly of conductors in an outer jacket or sheath. Plastic sheathed, or Type NM (NonMetallic), cable, is widely used for home wiring circuits. Modern Type NM cables have different color sheathing which indicates the size of the conductors: White for 14AWG (American Wire Gauge) conductors, Yellow for 12 AWG conductors, and Orange for 10 AWG conductors.
