Which NEC article covers hazardous locations and fire risk considerations?

• A. Article 500 (Hazardous locations)
• B. Article 725 (Class 2 and 3 circuits)
• C. Article 110 (General safety requirements)
• D. Article 410 (Luminaire mounting)

Answer: (A)

Hazardous locations and fire risk considerations are addressed by a section of the code that defines where flammable gases, vapors, liquids, dust, or fibers can ignite and what protections are needed. This topic is covered by Article 500, which lays out how these locations are classified (classes, divisions, and groups), what equipment is permitted, and what wiring methods and protection techniques must be used to prevent ignition. It also guides labeling and coordination with related requirements for equipment enclosures, sealing, and installation practices appropriate to the level of risk.

The other options focus on different areas: one deals with low-voltage Class 2 and Class 3 circuits, another covers general safety requirements for electrical installations, and the last addresses how luminaires are mounted. None of those specifically establish the rules for hazardous locations or fire-risk mitigation, making Article 500 the correct reference for this topic.