The metal armor on this cable acts as conduit to protect the internal wires. It's often used along the exterior of walls to carry power to outlet boxes. Also known as MC cable.

This cable has an uninsulated ground wire that touches the protective metal armor so it can be used for bonding and grounding. It's often used along the exterior of walls to carry power to outlet boxes. Also known as AC and BX cable.

Also known as antishort bushings, these grommets slide into the ends of conduit and armored cable to protect wire and cable from sharp edges.