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

Article 388 of the National Electrical Code focuses on Surface Nonmetallic Raceways. This article provides requirements pertaining to the installation and use of nonmetallic raceways that are mounted on the surface of walls, ceilings, or similar structures. These raceways are designed to protect conductors and facilitate electrical installations in areas where a more aesthetically pleasing or less intrusive method is desired compared to other types of raceways.

Surface nonmetallic raceways can be beneficial in residential settings or for retrofitting existing buildings, allowing electrical wiring to be run without the need for extensive wall modifications. The Article covers aspects such as the materials permissible for these raceways, their installation methods, and the types of conductors that may be utilized within them, ensuring safety and compliance with electrical standards.

The other options focus on different subjects covered by the NEC. Underfloor raceways are detailed in a separate article, while concealed knob-and-tube wiring and flexible cords and cables also fall under distinct categories within the Code. Understanding that Article 388 is specifically dedicated to surface nonmetallic raceways helps solidify knowledge of the NEC and its organization.