NM Cables

The most common type of home electrical wiring is the NM cable, also known as the Romex cable, after the most popular electrical wiring brand name. The NM cables contain three or more individual conductors, wrapped together in a sheathing, which is a flexible plastic jacket. This type of cable is generally used for dry, interior home wiring and this includes appliances, fixtures, switches, and outlets. Today, the NM cables are color-coded, meaning that the outer jacket of the cable comes in different colors to indicate the wire gauge. Here are the most common NM cables you most likely find in modern homes: