Article 378 covers which type of raceway?

Article 378 specifically pertains to nonmetallic wireways, which are used to manage and protect electrical wiring in a manner similar to other types of raceways but with the advantage of being lightweight and corrosion-resistant. Nonmetallic wireways are typically constructed of materials such as PVC, which makes them suitable for environments where moisture or chemical exposure might be a concern.

The use of nonmetallic wireways is important because they offer a practical alternative to metal wiring options while still providing sufficient structural integrity and protection for the wires contained within. Additionally, these wireways are designed for easy installation and can often be used in places where metal might pose a problem, such as in areas with a higher risk of corrosion or where weight considerations are critical.

While surface metal raceways, multioutlet assemblies, and nonmetallic extensions are important components of electrical installations covered in other parts of the NEC, they do not fall under Article 378. Understanding the specific scope of Article 378 helps in the correct application and compliance with the NEC when selecting the appropriate wiring method for electrical systems.