NFPA 110 Testing Schedule Builder
EPSS inspection§8.4.1
30-minute exercise under load§8.4.2
Transfer-switch operation§8.4.6
Supplemental load-bank test§8.4.2.4
4-hour continuous test§8.4.9
Facility type
Is the generator in service?
Level 1 — failure could cause loss of life or serious injury. Strictest testing and fuel rules, including the 36-month 4-hour test.
Your AHJ or design engineer assigns the official Level, Type and Class — treat this as a starting point.
Compliance checklist
Print it, post it in the generator room, and make every line someone's job.
- Weekly EPSS inspection logged (fuel, oil, coolant, battery, charger, switch in AUTO)
- Monthly 30-minute test at ≥30% nameplate kW (or exhaust-temp method) logged
- Healthcare only: 12 tests/year, spaced 20–40 days apart
- Monthly ATS operation logged for every transfer switch
- Annual load-bank test scheduled if monthly load falls below 30%
- Triennial 4-hour test current (Level 1 systems)
- Fuel quality tested annually (stored diesel degrades)
- All records filed, dated, signed, and ready for the AHJ or surveyor
NFPA 110 §8.3.4 — keep written records of every inspection, test and repair on site, available to the AHJ.
This tool is a planning aid. It does not replace final engineering review, AHJ determination, or a formal quote. Verify requirements with your AHJ and a licensed engineer.