Which NEC article governs wiring methods and the installation of conductors in walls and ceilings?

• A. Article 334
• B. Article 430
• C. Article 230
• D. Article 300

Answer: (D)

The key idea is recognizing which NEC section sets the general rules for how wiring is run and installed, especially inside walls and ceilings. That guidance is found in the Wiring Methods and Materials article, which covers the overall requirements for routing conductors, securing and supporting them, and protecting them in concealed spaces. It explains how cables and raceways are used, how bends and fills must be handled, and how walls and ceilings must be kept safe from damage and fire spread.

Other parts of the code handle more specific topics. For example, the article dedicated to nonmetallic-sheathed cable deals with NM cable itself, separate from the general wiring methods. The article on motors and motor circuits covers wiring for motors, and the article on services addresses service entrances and feeders. The broad, authoritative guidance for installing conductors in walls and ceilings comes from the Wiring Methods and Materials section.