What is the focus of Article 388 in the National Electrical Code?

Article 388 of the National Electrical Code specifically addresses Surface Nonmetallic Raceways. This section outlines the requirements and specifications regarding raceways that are installed on the surface of walls, ceilings, or floors and are constructed of nonmetallic materials. These raceways are commonly used to protect electrical wiring while providing an aesthetically pleasing finish, as they can be painted or blended with the surroundings.

The article includes details about the allowable materials, installation practices, and performance standards to ensure safety and reliability. This is important because nonmetallic raceways must meet certain standards to ensure they provide suitable protection against environmental factors while also containing electrical conductors safely.

The other options involve different topics within the National Electrical Code, focusing on distinct wiring and installation standards rather than nonmetallic raceways, highlighting the specificity and scope of Article 388 in the broader context of electrical installation safety and standards.