Which NEC article governs motor circuits and controllers?

• A. Article 430
• B. Article 215
• C. Article 210.52
• D. Article 300

Answer: (A)

The main concept tested is which NEC article specifically covers motor circuits and motor controllers. Motors have distinct needs—like handling high inrush currents, requiring proper overload protection, and coordinating control devices—that merit their own section. This article lays out the rules for motor branch-circuit conductors, motor controllers, overload protection sized to the motor’s full-load current, and the required disconnecting means. It also addresses starting methods (across the line, reduced-voltage, soft starters, variable-frequency drives) and the use of motor-control centers and enclosures. Because of this motor-focused scope, it is the appropriate reference for motor circuits and controllers. The other articles deal with different parts of the electrical system—general feeders and branch circuits, dwelling-unit receptacles, and general wiring methods—so they don’t govern motor-specific requirements.