Which of the following is NOT covered under the NEC articles mentioned?

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Building Wire is extensively addressed within the National Electrical Code (NEC), as it encompasses the conductors used for distributing electrical power and is fundamental to electrical installation standards and safety practices. The NEC provides specific guidelines covering various aspects of building wire installation, including permissible types, material specifications, and installation protocols necessary to ensure safety and efficiency in electrical systems.

On the other hand, instrumentation tray cable, fire alarm systems, and communications circuits, although relevant to the broader field of electrical installations, are treated more distinctly in regard to specialized applications or systems. Each has dedicated articles within the NEC that outline specific installation requirements, construction specifications, and safety considerations pertinent to their use. These specialties emphasize that building wire is a core element of overall electrical infrastructure and is thoroughly covered to ensure reliability and safety in buildings and facilities.