Inspection Requirements
Chapter 14 of NFPA 72 is one of the most heavily tested chapters and governs the ongoing inspection, testing, and maintenance (ITM) of fire alarm systems. Visual inspections verify that equipment is in place, undamaged, and free from obvious defects. Inspections are required at specific frequencies: some items require weekly or monthly inspection, while others are inspected semiannually or annually. For example, control equipment is typically inspected annually, while fire alarm system trouble signals and supervisory devices require more frequent checks.
Testing Methods and Frequencies
Functional testing goes beyond visual inspection to verify that each device and circuit operates correctly. Testing frequencies vary by component. Smoke detectors must be functionally tested at least annually. Waterflow switches, tamper switches, manual fire alarm boxes, and notification appliances also require annual testing. Smoke detector sensitivity must be tested within one year of installation and then every alternate year thereafter, unless the detectors are listed for a longer testing interval. Detectors found outside their listed sensitivity range must be cleaned, adjusted, or replaced.
Maintenance Requirements
Maintenance ensures that system components continue to function as designed over time. This includes cleaning detectors, replacing batteries on schedule, verifying software integrity, and repairing or replacing damaged components. NFPA 72 requires that maintenance be performed by qualified personnel familiar with the system and the code requirements.
Impairment Management and Documentation
When a fire alarm system or any portion of it is taken out of service, the building owner and the AHJ must be notified. Impairment procedures must be established in advance, and alternative protective measures should be implemented during the impairment period. All inspection, testing, and maintenance activities must be documented and records retained for review by the AHJ. These records form the compliance history of the system.
