Article 320-Armored Cable (Type AC)

Article _____ covers the use, installation, and construction specifications for armored cable, Type AC.

320

Horizontal runs of Type AC cable installed in wooden or metal framing members or similar supporting means shall be considered supported and secured where such support does not exceed _____ ft intervals.

4 1/2

Type _____ cable is a fabricated assembly of insulated conductors in a flexible interlocked metallic armor.

AC

Exposed runs of Type AC cable can be installed on the underside of joists where supported at each joist and located so it is not subject to physical damage.

True

Type AC cable installed through, or parallel to, framing members shall be protected against physical damage from penetration by screws or nails.

True

Type AC cable outer armor is permitted to act as an equipment grounding conductor.

True

Type AC cable shall be secured at intervals not exceeding 4 1/2 ft and within _____ in. of every outlet box, cabinet, conduit body, or fitting.

12

Type AC cable and associated fittings shall be _____.

listed

Armored cable used to connect recessed luminaires or equipment within an accessible ceiling can be unsupported and unsecured for lengths up to _____ ft.

6

When Type AC cable is run across the top of a floor joist in an attic without permanent ladders or stairs, guard strips within _____ ft of the scuttle hole or attic entrance shall protect the cable.

6

Type AC cable installed in thermal insulation shall have conductors that are rated at 90°C. The ampacity of the cable in this application shall not exceed that of a _____ rated conductor.

60°C

When armored cable is run parallel to the sides of rafters, studs, or floor joists in an accessible attic, the cable shall be protected with running boards.

False

Type AC cable is permitted in _____.

cable trays

At Type AC cable terminations, a(an) _____ shall be provided to protect wires from abrasion.

fitting

The radius of the curve of the inner edge of any bend shall not be less than _____ for Type AC cable.

five times the diameter of the cable

Armored cable shall not be installed _____.

in damp or wet locations, where subject to physical damage, and where exposed to corrosive conditions

Type AC cable shall be supported and secured by _____.

staples, cable ties listed and identified for securement and support, and straps