Which article covers Class 2 circuits used for signaling and control?

Which article covers Class 2 circuits used for signaling and control?

• A. Article 210
• B. Article 800
• C. Article 725
• D. Article 400

Answer: (C)

Class 2 circuits used for signaling and control are governed by Article 725. This part of the NEC specifically covers remote-control, signaling, and power-limited circuits, including Class 2 circuits, with the rules that apply to their installation, wiring methods, and overcurrent protection. That focus makes it the correct reference for signaling and control uses, rather than other articles that address different systems: Article 210 deals with branch circuits for lighting and receptacles, Article 800 covers communications circuits, and Article 400 addresses flexible cords and cables. In practice, this means the requirements you’d use for running and protecting Class 2 signaling circuits come from Article 725, reflecting their energy-limited nature and signaling/control purpose.

Class 2 circuits used for signaling and control are governed by Article 725. This part of the NEC specifically covers remote-control, signaling, and power-limited circuits, including Class 2 circuits, with the rules that apply to their installation, wiring methods, and overcurrent protection. That focus makes it the correct reference for signaling and control uses, rather than other articles that address different systems: Article 210 deals with branch circuits for lighting and receptacles, Article 800 covers communications circuits, and Article 400 addresses flexible cords and cables. In practice, this means the requirements you’d use for running and protecting Class 2 signaling circuits come from Article 725, reflecting their energy-limited nature and signaling/control purpose.