![]() ![]() 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. Plastic sheathed, or Type NM (NonMetallic), cable, is widely used for home wiring circuits. A cable is a factory-made assembly of conductors in an outer jacket or sheath. 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. In the United States, the color of the wire used must comply with the requirements of the National Electrical Code (NEC).Ī Word of Caution: Always use a line voltage meter or circuit tester to determine if a wire is "hot" or "live." Never rely on a wire's color alone. The connections should not be made haphazardly. Understanding the information those colors convey helps you work with greater safety and ease when troubleshooting an electrical problem or making repairs or improvements to your electrical system.
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