Which action requires re-acceptance testing after changes to a fire alarm system?

Which action requires re-acceptance testing after changes to a fire alarm system?

• A. A visual inspection is adequate
• B. Replace the detectors
• C. Check battery and wiring only
• D. Re-acceptance testing

Answer: (D)

When a fire alarm system is changed, you must perform re-acceptance testing to confirm the entire system still meets code requirements and functions correctly with the modifications. A visual inspection won’t catch hidden wiring faults, detector interactions, or signaling issues. Checking only batteries and wiring confirms power and basic connections but not how the system operates as a whole. Replacing detectors is a modification, but without re-acceptance testing there’s no formal verification that the updated system still performs to spec. The re-acceptance test is the formal step that revalidates the entire system after changes, ensuring proper detection, signaling, and overall reliability.

When a fire alarm system is changed, you must perform re-acceptance testing to confirm the entire system still meets code requirements and functions correctly with the modifications. A visual inspection won’t catch hidden wiring faults, detector interactions, or signaling issues. Checking only batteries and wiring confirms power and basic connections but not how the system operates as a whole. Replacing detectors is a modification, but without re-acceptance testing there’s no formal verification that the updated system still performs to spec. The re-acceptance test is the formal step that revalidates the entire system after changes, ensuring proper detection, signaling, and overall reliability.