Southwire Company 250 ft. Solid Metal Clad Armored Cable; Conductors: 3 with Ground, 12 AWG Wire Size, Silver

Armored building cable is a collection of plastic-coated insulated wire bundled together and protected by a corrugated metal jacket (called a sheath or cord) that serves as a conduit and provides grounding. Also known as BX cable or metal-clad (MC) cable, armored cable prevents accidental penetration better than NM-B building cable, but it is heavier and harder to handle, rip back, and cut. It is often used in applications where cable will be exposed to mechanical or environmental damage under normal operating conditions, such as power circuits in industrial plants and commercial buildings.

Building wire and cable carry electrical current from a power source to a device in a building, such as an outlet or light fixture. Building wire is typically run through conduit, cable trays, or raceways. Building cable consists of multiple strands of wire bundled inside a thermoplastic or metal sheath. Building wire and cable are typically used to run new circuits or extend old circuits inside walls and ceilings in commercial, industrial, and residential properties.