What is Type NM cable also known as?

Type NM cable is also known as non-metallic sheathed cable. This designation is based on its construction, which features insulated conductors enclosed in a non-metallic outer sheathing. Non-metallic sheathed cable is widely used in residential wiring applications because it is lighter, easier to handle, and less expensive than other types of cable like metallic insulated cable. This type of cable is specifically designed for indoor use and is compliant with the National Electrical Code (NEC), which emphasizes safety and performance standards for electrical installations.

In contrast, the other options refer to different types of cables or specific features that do not align with the characteristics of Type NM cable. For example, metallic insulated cable contains a metal sheath for additional protection and grounding, high-temperature cable is rated for higher operating temperatures, and outdoor rated cable is designed to withstand environmental factors such as moisture and UV exposure. Therefore, identifying Type NM cable as non-metallic sheathed cable accurately reflects its classification and intended use in electrical systems.