Home Wiring Types Of Cables. Romex is a common type of residential wiring that is categorized by the National Electrical Code NEC as underground feeder UF or non-metallic sheathed cable NM and NMC. Those conductors are wrapped in a flexible plastic jacket also known as sheathing.
In knob-and-tube wiring individually conducting wires protected by rubberized cloth fabric are installed in stud and joist cavities held in place by porcelain knob insulators attached to the sides of framing members and protected by porcelain tube insulators where the wires run through framing members. The common type of home electrical wiring is non-metallic or NM cable. The common type of home.
The common type of home.
The grounding wire may or may not be insulated. The most common multi-conductor cable is made from metal or plastic and contains a neutral wire a hot wire or two and a grounding wire. NM and NMC conductors are composed of two or more insulated conductors contained in a non-metallic sheath. Often called Romex after one popular brand name NM cable is a type of circuit wiring designed for interior.