Which NEC article governs power-limited circuits?

Which NEC article governs power-limited circuits?

• A. NEC Article 725
• B. NEC Article 110
• C. NEC Article 760
• D. NEC Article 300

Answer: (A)

Power-limited circuits are those where the energy that can be delivered is restricted to reduce shock and heat hazards. In the NEC, these are defined as Class 2 and Class 3 circuits, and the requirements for their installation and protection are laid out in Article 725. That article specifies how conductors and insulation should be rated, what overcurrent protection is allowed, and the wiring methods appropriate for these low-energy circuits, along with other installation rules to keep these circuits safe and reliable. Other articles govern different areas: general safety and equipment requirements are covered in Article 110, fire alarm-related circuits in Article 760, and general wiring methods in Article 300. Thus, power-limited circuits fall under Article 725 because it directly addresses the needs and limitations of these low-energy circuits.

Power-limited circuits are those where the energy that can be delivered is restricted to reduce shock and heat hazards. In the NEC, these are defined as Class 2 and Class 3 circuits, and the requirements for their installation and protection are laid out in Article 725. That article specifies how conductors and insulation should be rated, what overcurrent protection is allowed, and the wiring methods appropriate for these low-energy circuits, along with other installation rules to keep these circuits safe and reliable.

Other articles govern different areas: general safety and equipment requirements are covered in Article 110, fire alarm-related circuits in Article 760, and general wiring methods in Article 300. Thus, power-limited circuits fall under Article 725 because it directly addresses the needs and limitations of these low-energy circuits.