Which article focuses on general wiring methods and the installation of conductors, cables, raceways, and enclosures?

• A. Article 310: Conductors for general use: ampacity, insulation, and temperature ratings.
• B. Article 250: Grounding and bonding to establish a safe path to earth and equalize potential.
• C. Article 240: Overcurrent protection: sizing and protecting conductors and devices to prevent overheating.
• D. Article 300: General wiring methods and the installation of conductors, cables, raceways, and enclosures.

Answer: (D)

This question tests recognizing which NEC article title matches the topic of general wiring methods. The article that focuses on general wiring methods and the installation of conductors, cables, raceways, and enclosures is the one that lays out how conductors are routed, supported, protected, and enclosed in electrical installations. That article provides the rules for the physical methods of wiring—where and how conductors and cables can be run, how raceways and enclosures are used, and related installation practices.

The other articles cover different areas: one deals with ampacity, insulation, and temperature ratings for conductors; another covers grounding and bonding to establish a safe path to earth and normalize potentials; a third discusses overcurrent protection and the sizing of devices to prevent overheating. So the article described by the question is the one dedicated to general wiring methods.