NM Cable, or Non-Metallic Sheathed Cable, is a type of electrical wiring commonly used in residential buildings. It consists of two or more insulated conductors and a bare ground wire, all encased in a flexible plastic sheath. This design makes it lightweight and easy to install, often used for indoor wiring in walls and ceilings. The most common type of NM Cable is Romex, which is a brand name that has become synonymous with this type of wiring. NM Cable is suitable for dry locations and is typically rated for 15 or 20 amps, making it ideal for general lighting and outlet circuits.