Article 770 focuses primarily on which type of cable?

Article 770 of the National Electrical Code (NEC) specifically addresses the installation requirements for Optical Fiber Cables. These cables are essential for high-speed data transmission and telecommunications systems, allowing for the rapid movement of large amounts of data over long distances.

The provisions outlined in Article 770 ensure safe installation practices, protection against physical damage, and proper termination of fiber optic cables, which are critical to maintaining performance and reliability in communication networks. This article encompasses guidelines on bending radius, cable supports, and fire safety measures, which are specifically tailored for the unique properties of optical fiber.

Other options listed pertain to different aspects of electrical installations but do not focus on optical fiber. For example, communications circuits are a broader category that can include various types of wiring, not exclusively optical fiber. Fire alarm systems focus on specific safety protocols related to fire detection and alarm signaling circuits. Similarly, radio and television equipment involves different types of wiring and equipment setups that are outside the scope of Article 770. Therefore, the correct identification of Article 770 as pertaining specifically to Optical Fiber Cables is crucial for anyone involved in electrical installations related to telecommunications and data networks.