Which article focuses on conductors for general use: ampacity, insulation, and temperature ratings?

• A. Article 310: Conductors for general use: ampacity, insulation, and temperature ratings.
• B. Article 334: Nonmetallic-sheathed cable (NM).
• C. Article 320: Armored Cable (AC) usage and installation.
• D. Article 400: Flexible cords and cables.

Answer: (A)

This item tests where general-use conductors are governed, specifically the rules for ampacity, insulation, and temperature ratings. The article that covers conductors for general use provides the ampacity tables and the rules for choosing conductor size based on temperature rating and insulation type, and it explains how temperature ratings (like 60°C, 75°C, or 90°C) influence allowable current. It’s the broad, all-purpose rule set that applies to most wiring installations and a wide range of conductor types.

The other choices pertain to specific conductor families with their own separate requirements: NM cable has its own rules, armored cable is addressed in its own article, and flexible cords and cables are covered elsewhere. Because the question is about conductors suitable for general use across many applications, the article that governs general-use conductors is the best fit.