Which article discusses materials used for fixtures in wiring?

The correct choice discusses Article 394, which specifically addresses the materials and construction requirements for fixtures in wiring. This article provides essential guidelines regarding the installation and design of various types of wiring methods, ensuring that fixtures are compatible with electrical systems and are safe for use in residential and commercial applications.

Understanding this article is crucial for electrical professionals and installers, as it outlines necessary safety standards, including ratings for temperature and moisture resistance, which influence the selection of materials in light fixtures, devises, and other electrical equipment. Proper adherence to the specifications in Article 394 contributes to the overall reliability and safety of electrical installations.

The other articles mentioned pertain to different aspects of the National Electrical Code. For instance, Article 402 deals with flexible cords and cables, Article 400 covers flexible metal conduit, and Article 408 addresses panelboards and breakers. While these articles are important for various components in electrical systems, they do not focus specifically on materials used for fixtures, which is what Article 394 specializes in.