Which standard governs emergency signaling including intelligibility and survivability?

• A. NFPA 72
• B. NFPA 101
• C. NFPA 70
• D. NFPA 13

Answer: (A)

The main concept here is which standard governs how emergency signaling is designed to be heard and understood and how the system stays active during an emergency. That standard is NFPA 72, the National Fire Alarm and Signaling Code. It sets the requirements for fire alarm systems, including how voice and audible alerts are delivered so occupants can understand messages in real building conditions (intelligibility) and how the system remains functioning during a fire or power loss (survivability) through features like proper amplification, coverage, and reliable power and circuit design. The other codes focus on related but different areas: NFPA 101 covers overall life safety and egress, NFPA 70 is about electrical installations, and NFPA 13 deals with sprinkler systems, none of which specifically govern emergency signaling performance in the way NFPA 72 does.