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Article 800 of the National Electrical Code (NEC) specifically addresses the installation requirements for communication circuits and equipment. This includes various types of wiring used for communication systems, such as telephone and data, which is why residential telephone wiring falls under its purview. The article outlines guidelines for the installation, support, and protection of these communication systems to ensure safety and reliability.

The focus of Article 800 provides a framework that allows for the proper installation and functioning of communication systems in residential settings, thus making it crucial for residential telephone wiring. The requirements include specifications on conductor sizing, cable types, and installation methods, thereby ensuring that telephone systems operate effectively within residential structures.