A single open or single ground fault must be automatically annunciated at the FACP within how many seconds on all installation conductors that are monitored for integrity?

• A. 150 seconds
• B. 100 seconds
• C. 200 seconds
• D. 250 seconds

Answer: (C)

When a system’s wiring is being actively monitored for integrity, a single open or a single ground fault on that monitored conductor is treated as a fault condition that needs timely visibility. The FACP must automatically display or indicate this fault within a defined window to balance prompt notice with avoiding nuisance alerts from brief disturbances. The specified window is 200 seconds, which means if the fault persists long enough (after repeated checks), the panel will annunciates the fault. This duration gives enough time for transient issues to clear while ensuring that a true, persistent fault on any monitored conductor is promptly brought to attention so maintenance can locate and repair the defective wiring. Shorter times could cause too many false alarms from momentary glitches, and longer times could leave a real fault undetected for too long.