Generator Load Test Requirements (NFPA 110)
The NFPA 110 emergency generator schedule — weekly inspection, monthly load run, semi-annual and 36-month tests — plus the CMS/NFPA 99 healthcare tightening.
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NFPA 110 schedule
Every requirement carries its code section and the edition it was verified against. ★ = qualified in-house under the national code, but licensing commonly required locally — confirm with your AHJ.
| Task | Frequency | Who may perform | Code (edition) | Record |
|---|---|---|---|---|
| EPSS inspection — fuel, oil, coolant, batteries, charger, leaks | Weekly | In-house (qualified) | NFPA 110 §8.4.1 (weekly inspection) (2022) | Checklist log |
| Exercise under load — ≥30 min, ≥30% nameplate (diesel) | Monthly | In-house (qualified) | NFPA 110 §8.4.2 (monthly load run) (2022) | Run log: load, duration, transfer |
| EPSS thorough inspection (full power chain) ★ | Semi-annual | In-house (qualified)★ | NFPA 110 §8.3.1 (2022) | Report |
| Load bank test at rated capacity (if monthly loading <30%) | Annual | Certified / licensed | NFPA 110 §8.4.2.4 (annual load bank) (2022) | Test report |
| Full-load test, 4 continuous hours (Level 1 systems) | Every 3 years | Certified / licensed | NFPA 110 §8.4.9 (36-month 4-hour) (2022) | Test report |
| Starting battery replacement (per manufacturer) | Every 2 years | In-house (qualified) | NFPA 110 §8.3.7 / manufacturer (2022) | Log |
Other schedules: NFPA 80 · NFPA 10 · NFPA 101 · Cross-connection control · ASME A17.1
National consensus-standard baseline with the edition noted per item. Your state, fire marshal, or accrediting body may require more frequent service or licensed personnel where a qualified person is shown. General information, not legal or engineering advice — confirm with your AHJ.
Questions people ask
- How often does NFPA 110 require inspection?
- NFPA 110 sets a schedule from weekly, monthly, semi-annual, annual intervals. The full task-by-task table with code sections and who may perform each task is shown above, and the calendar builder dates it from your real last-completed dates.
- Which of these tasks can be done in-house?
- Tasks marked Tier 1 or Tier 2 can be performed by trained facility staff with documentation under the national code. Tier 3 tasks require a certified or licensed professional. Starred tasks are qualified in-house under the national code but licensing is commonly required locally — confirm with your AHJ.