Which NEC article governs emergency power systems and life-safety installations?

• A. Article 700
• B. Article 517
• C. Article 725
• D. Article 800

Answer: (A)

Providing emergency power to life-safety loads is handled by the NEC in the article dedicated to Emergency Systems. This article lays out how emergency power sources—like generators and batteries—must be wired to supply critical life-safety equipment such as exit lighting, emergency lighting, and fire alarm circuits. It also specifies how automatic transfer switches, disconnects, and distribution must be arranged so these essential Systems kick in reliably the moment normal power fails, along with requirements for testing and ongoing maintenance. That clear, focused scope is why it’s the best choice for questions about emergency power systems and life-safety installations. Other articles address healthcare facility power provisions, power-limited circuits, or communications systems, which don’t cover the general emergency-power needs for life-safety loads.