Which NFPA 70 article number deals with remote control, signaling, and power-limited circuits?

Which NFPA 70 article number deals with remote control, signaling, and power-limited circuits?

• A. Article 725
• B. Article 720
• C. Article 727
• D. Article 760

Answer: (A)

Article 725 is the section of NFPA 70 that groups remote-control, signaling, and power-limited circuits together. This article is built around the idea that these circuits operate with limited power and are used for control or signaling functions, often from a distance, rather than supplying general branch circuits. It sets specific rules for how these conductors are installed, sized, insulated, and protected, reflecting the lower energy and different safety considerations of these circuits (including Class 2 and Class 3 circuit concepts). The other articles cover different topics—general power and lighting distribution, other control or instrumentation topics, and fire alarm signaling, respectively—so they aren’t the correct reference for this particular scope. This is why Article 725 is the best answer.

Article 725 is the section of NFPA 70 that groups remote-control, signaling, and power-limited circuits together. This article is built around the idea that these circuits operate with limited power and are used for control or signaling functions, often from a distance, rather than supplying general branch circuits. It sets specific rules for how these conductors are installed, sized, insulated, and protected, reflecting the lower energy and different safety considerations of these circuits (including Class 2 and Class 3 circuit concepts). The other articles cover different topics—general power and lighting distribution, other control or instrumentation topics, and fire alarm signaling, respectively—so they aren’t the correct reference for this particular scope. This is why Article 725 is the best answer.