Which NEC article covers the proper installation and use of switch devices?

• A. Article 404
• B. Article 314
• C. Article 230
• D. Article 250

Answer: (A)

Switch devices are treated in the NEC as the control equipment for circuits, so the article that covers their proper installation and use is the one dedicated to switches. This article explains what counts as a switch, how switches must be wired and mounted, where they can be located, and how they interact with the conductors in a circuit. It addresses different switch types (single-pole, three-way, etc.), box-fill considerations for the device, and requirements to ensure safe, accessible installation. The other articles mentioned cover related but broader topics—box structures (not switches), service equipment, and grounding—so they don’t specifically govern how switch devices should be installed and used.