What are the typical power sources and backup provisions for a fire alarm control panel?

• A. Solar power
• B. Primary power from building electrical supply with a battery backup
• C. Generator power only
• D. Manual crank

Answer: (B)

Fire alarm control panels are designed to stay operational even when the building’s power goes out. The typical setup uses the building’s electrical service as the primary power source, with a battery backup that automatically takes over during outages. The battery keeps the panel running (and the alarm system functioning) while mains power is lost, and it’s sized to provide standby power for a defined period. In many systems, if outages last longer, an on-site generator can automatically start and supply power through an automatic transfer switch, but the essential idea is still primary building power plus a battery backup. Solar power isn’t standard for these panels, and a manual crank wouldn’t provide the automatic, reliable operation that fire alarms require.