What is the focus of Article 374 in the NEC?

The focus of Article 374 in the National Electrical Code (NEC) is specifically on Cellular Metal Floor Raceways. This article addresses the design, installation, and usage requirements for raceways that are constructed with metal and have a cellular structure, allowing for a combination of electrical wiring and the placement of electrical equipment in a floor system.

Cellular metal floor raceways are particularly useful in commercial and industrial settings where there is a need for flexible, organized, and safe management of electrical systems. They provide protection for the wiring, help to manage heat dissipation, and allow for easy access for maintenance or reconfiguration of electrical circuits.

Each of the other choices relates to different types of raceway systems regulated under separate sections in the NEC. For instance, metal wireways and nonmetallic wireways are governed by different parts of the code that specify their installation, construction, and usage requirements. Therefore, while they are all categories of raceways, the specific focus of Article 374 is on the unique characteristics and applications of cellular metal floor raceways.