Which section of the NEC covers cable trays?

The correct answer focuses on NEC Article 391, which specifically regulates cable trays. This section provides guidelines and requirements for the installation and use of cable trays, ensuring that they are safely and effectively utilized in various electrical applications. This includes standards for supporting, protecting, and securing cables as they are routed through these trays.

Cable trays are crucial components in electrical systems, especially in large installations where managing multiple cables is necessary for organization and efficiency. The NEC outlines specifications that must be followed to protect the cables from mechanical damage and to ensure proper support, which is vital for maintaining the integrity of the electrical infrastructure.

NEC Article 300 generally deals with the general requirements for wiring methods and materials, while Article 400 covers flexible cords and cables. Article 500 pertains to hazardous locations, addressing the unique requirements for electrical installations in environments where combustible gases or vapors may be present. While all of these articles play important roles in electrical installations, none are dedicated to the specifications for cable trays, further underscoring why Article 391 is the most relevant section for this topic.