Inspection, Testing, and Maintenance
The ITM framework
NFPA 72 Chapter 14 sets inspection, testing, and maintenance frequencies. Inspection is a visual/functional check (monthly, quarterly, semiannual, annual). Testing verifies operation (annual for most devices; semiannual for some; monthly for certain supervisory functions). Maintenance is corrective work and is performed as needed. Record of completion and inspection/testing/maintenance records must be retained and made available to the AHJ.
Frequencies to memorize
- Monthly: supervisory devices, batteries (visual), remote annunciators, certain trouble signals.
- Quarterly: waterflow devices, supervisory signal devices, valve tamper switches.
- Semiannual: some duct detectors and certain supervisory functions.
- Annual: initiating devices, notification appliances, batteries (load test), control unit functions, voice intelligibility.
- Sensitivity testing: smoke detectors annually (or per manufacturer), with recalibration if out of tolerance.
Testing traps
- Assuming all devices are annual - some are semiannual or quarterly.
- Forgetting that battery load testing is annual and that replacement follows manufacturer guidance.
- Missing that sensitivity testing of smoke detectors is required and that out-of-tolerance units must be cleaned/recalibrated or replaced.
- Treating a visual inspection as a functional test.
- Forgetting documentation retention and AHJ availability.
Rule of thumb
When a question asks "how often," first identify the component class (initiating, notification, supervisory, battery, control unit). Then recall the NFPA table: supervisory quarterly, devices annual, batteries monthly visual plus annual load test.