What does the term 'raceways' encompass?

The term 'raceways' encompasses a variety of channels for electrical wiring, which is why this choice is the most accurate. In the context of the National Electrical Code, raceways are defined as any enclosed channel that is intended for holding wires, cables, or busbars. This includes not only conduits made from various materials—such as metallic and nonmetallic—but also cable trays, ducts, and troughs. The versatility of raceways allows them to accommodate different installation needs, providing protection and organization for electrical conductors in various environments. This comprehensive definition highlights their importance in ensuring proper electrical installations and safety.

In contrast, the focus on only nonmetallic conduits or rigid metal conduit alone is too narrow; raceways are not limited to these materials. Similarly, restricting the definition to exclusively underground raceways excludes the many above-ground applications and types available. This broad classification ensures that all methods of securing and routing electrical wiring are recognized under the term 'raceways'.