Which article of the National Electrical Code (NEC) addresses wiring methods and materials?

The correct choice is Article 300 because this article specifically discusses the general requirements for wiring methods and materials used in electrical installations. Article 300 outlines various aspects such as permitted wiring methods, installation practices, and the necessary conditions to ensure safety and compliance with the NEC standards. It provides guidelines for different types of conductors, raceways, and cable assemblies, detailing how they should be installed to prevent risks such as electrical fires or failures.

The other articles mentioned do not focus on wiring methods and materials in the same comprehensive way. Article 200 deals with the use and meaning of electrical terminology, while Article 400 addresses flexible cords and cables. Article 500 covers hazardous locations and the special considerations that need to be taken into account when working in those environments. Understanding the specifics of Article 300 is essential for ensuring that electrical installations are performed according to recognized safety standards and practices.