What type of cables can be used inside walls, ceilings, or under the floor?

Non-metallic (NM) cables are specifically designed for use in residential and commercial buildings, making them suitable for installation inside walls, ceilings, or under floors. These cables are often used in dry locations and are favored for their flexibility and ease of installation in typical wiring situations, such as lighting circuits and standard receptacles.

The construction of non-metallic sheathed cable typically includes two or more insulated conductors and may include a bare ground wire, all housed within a moisture-resistant plastic sheath. This type of cable is recognized for its safety features and compliance with the National Electrical Code (NEC), which further supports its use in various interior applications.

Non-metallic cables are advantageous in that they reduce the risk of electrical shock and fire hazards when properly installed according to regulations. They are lightweight and easier to maneuver within walls and ceilings compared to other types of wiring, making them a popular choice among electricians.