Armored Cable (AC) installation is governed by which NEC article?

• A. Article 400
• B. Article 320
• C. Article 314
• D. Article 410

Answer: (B)

Armored Cable, or Type AC, is treated as its own wiring method in the NEC, with a dedicated article that covers how it is installed, supported, and protected, along with how terminations and splices are made. This article specifies the rules specific to AC cable, including where it can be used and how it must be secured and protected from damage. Because these guidelines are unique to AC cable, they’re found in Article 320. The other articles cover different wiring methods—such as flexible cords (Article 400), boxes and enclosures (Article 314), and luminaires (Article 410)—and don’t govern AC installations.