Which NEC article covers motors and motor circuits?

• A. Article 300.
• B. Article 430.
• C. Article 250.
• D. Article 210.

Answer: (B)

Motors and motor circuits are addressed in Article 430. This section covers everything you need to know to design and protect motor systems: selecting motor conductors, sizing overcurrent protection, and laying out the motor-control circuitry with starters, contactors, and other controllers (including variable frequency drives). It also sets rules for motor disconnecting means, enclosure requirements, and how the motor circuits interact with the rest of the electrical system. Remembering this helps you correctly size conductors and protective devices and ensure the motor-control path is installed safely and reliably. Other NEC articles deal with different topics—general wiring methods, grounding and bonding, or general branch-circuit requirements—so they aren’t focused on motors the way Article 430 is.