What type of cable is described in Article 320?

Article 320 of the National Electrical Code (NEC) specifically describes Armored Cable, commonly referred to as Type AC cable. This type of cable is designed with a protective metal sheath that provides mechanical protection for the insulated conductors inside, which is essential in areas where the cable might be subject to physical damage.

The armored layer helps to ensure the integrity of the conductors, reduces the risk of electrical shock, and protects against environmental factors. Type AC cable is typically used in residential, commercial, and industrial applications where extra durability is needed, making it versatile for various installation conditions.

The other options, while they may be valid types of cables in different contexts or codes, do not correspond to Article 320. Integrated Gas Spacer Cable, Flat Conductor Cable, and Flat Cable Assemblies each have distinct specifications and applications outlined in different articles of the NEC, but their descriptions are not included in the provisions of Article 320, which is dedicated to the requirements for Armored Cable. Understanding this classification helps ensure compliance with safety standards and best practices in electrical installations.