Metal Clad Armored Cable, Trade Designation MC, Wire Size 14 AWG, Number of Conductors 2 with Insulated CU Ground, Wire Color Black/Green/White, Jacket Color Silver, Length 25 ft, Conductor Design Solid, Jacket Material Aluminum, Insulation Material PVC, Nominal Outside Dia. 0.44 in, Packaging Coil, Voltage 600 V, Temp. Rating -6.8 Degrees to 194 Degrees F Dry 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 cabl.