If your building has an emergency generator, NFPA 110 is the standard your inspectors, your insurance carrier, and, if you're a healthcare facility, the federal government use to judge whether that generator counts as reliable emergency power or an expensive lawn ornament.
Here's the problem: most facility managers inherit a generator, a maintenance contract of unknown quality, and a binder that hasn't been opened since the last inspection. Then the fire marshal shows up, or an accreditation surveyor asks for run logs, and the scramble starts.
This guide covers what NFPA 110 requires, how it gets enforced in Texas specifically, and the schedule that keeps you compliant.
What NFPA 110 is, and who enforces it in Texas
NFPA 110 is the Standard for Emergency and Standby Power Systems. It covers the installation, maintenance, operation, and testing of Emergency Power Supply Systems (EPSS), your generator, its transfer switches, fuel system, batteries, and everything between the engine and the loads it protects.
NFPA 110 isn't a law by itself. It becomes enforceable when a code adopts it, and in Texas, that happens locally:
- Most Texas cities enforce a locally amended edition of the International Fire Code (IFC), which requires emergency and standby power systems to be maintained and tested in accordance with NFPA 110. Houston, Austin, Dallas, San Antonio, and most mid-size cities all follow this pattern, but each city adopts its own edition, with its own amendments.
- Your enforcement contact is the local Authority Having Jurisdiction (AHJ): usually the city fire marshal's office. Two buildings 20 miles apart can answer to different fire codes and different inspectors.
- Healthcare facilities carry a second layer: CMS and accreditation bodies (Joint Commission, DNV) enforce the Life Safety Code, which pulls in NFPA 110 and NFPA 99 for emergency power. More on that in our healthcare guide later this week.
- Some water and critical infrastructure operators have state-level obligations too: after Winter Storm Uri, Texas Senate Bill 3 (2021) required affected water utilities to build emergency preparedness plans that ensure continuous operation during outages, which for many systems means standby power.
The practical takeaway: "compliant" in Texas means compliant with what your specific AHJ enforces. The NFPA 110 schedule below is the common backbone.
The two system levels
NFPA 110 classifies systems by what happens if they fail:
- Level 1: failure could result in loss of human life or serious injury. Hospitals, high-rise egress systems, emergency lighting circuits, fire pumps served by generator power.
- Level 2: failure is less critical to life safety. Many commercial standby applications.
Level determines how strict the requirements are. If you don't know your system's level, that's the first question to answer, it's the lens your inspector uses.
The testing and maintenance schedule that keeps you compliant
This is the core of NFPA 110 Chapter 8, and it's where most facilities fall out of compliance:
Weekly: inspect the EPSS. Fuel levels, battery charger, block heater, leaks, alarms, switch positions. A walkthrough with a checklist, but it must be documented.
Monthly: exercise the generator under load for at least 30 minutes. For diesel units, the loading needs to reach at least 30% of the nameplate kW rating (or maintain the exhaust gas temperature the manufacturer recommends). A no-load "hum test" does not count, unloaded running actually harms diesel engines over time (wet stacking).
Monthly: operate each automatic transfer switch (ATS), transferring load to confirm the system actually picks up the building.
Annually: if your diesel generator can't reach that 30% load during monthly tests (very common in buildings where the generator is oversized), NFPA 110 requires a supplemental annual load bank test: roughly 1.5 continuous hours at escalating load, the exact profile is in the standard, and we cover it in detail in our load bank testing guide.
Every 36 months: Level 1 systems require an extended endurance test: a minimum 4-continuous-hour load test, proving the system can carry a real outage, not just a Tuesday morning exercise.
Ongoing: fuel quality testing for stored diesel (stored fuel degrades; a full tank of bad fuel is a failed generator with extra steps), battery maintenance, and manufacturer-required service intervals.
Documentation: the half of compliance everyone skips
When an inspector or surveyor evaluates your program, they don't watch your generator run, they read your records. NFPA 110 requires written records of inspections, tests, exercising, operation, and repairs. That means:
- Dated logs for weekly inspections and monthly tests, with load readings, not just "ran fine"
- ATS transfer records
- Load bank test reports with load steps and readings
- Fuel test results and corrective actions
- Repair records showing that identified deficiencies were actually closed out
If it isn't written down, it didn't happen, that's how every inspector in Texas treats it.
What this looks like when it's handled
A compliant program isn't complicated: it's consistent. Weekly eyes on the machine, monthly runs under real load, transfer switches exercised, an annual load bank when needed, fuel managed, and every event logged in a format you can hand an inspector without apologizing.
That consistency is exactly what a professional preventive maintenance contract exists to deliver. Buffalo Power Solutions runs NFPA 110-aligned PM programs for commercial facilities across Texas, our maintenance programs include the testing schedule, the load bank work, and the documentation package, for commercial facilities from College Station to Houston and Austin. One contract, audit-ready records, no scramble when the fire marshal calls.
Want to know where your facility stands? Request a no-obligation NFPA 110 compliance review, we'll walk your system, check your records, and tell you exactly what an inspector would flag. Call (979) 985-2632.
FAQ
Is NFPA 110 required by law in Texas?
NFPA 110 becomes enforceable through the fire code your city adopts, most Texas cities enforce a version of the International Fire Code, which requires emergency power systems to be maintained per NFPA 110. Healthcare facilities also face federal CMS enforcement through the Life Safety Code.
How often does a commercial generator need to be tested under NFPA 110?
Weekly inspection, a monthly 30-minute run under load (at least 30% of nameplate rating for diesel), monthly transfer switch operation, an annual load bank test if monthly loading falls short, and for Level 1 systems a 4-hour endurance test every 36 months.
What happens if my generator fails an inspection in Texas?
The AHJ can require correction on a deadline, and for licensed facilities (healthcare, assisted living) deficiencies can jeopardize accreditation or licensure. Insurance carriers may also treat an untested generator as an uncovered risk after a loss.
Who counts as the AHJ for my building?
Usually your city fire marshal's office. Healthcare facilities answer to CMS/accreditation surveyors as well. When in doubt, ask: requirements and adopted code editions vary city to city.
A note on accuracy: Code requirements vary by jurisdiction, code edition, and facility type. NFPA standards are updated on multi-year cycles, and each Texas city adopts and amends codes on its own schedule, your local Authority Having Jurisdiction (AHJ) always has the final word. This article is general educational guidance, not engineering or legal advice. Confirm the requirements for your specific facility with your AHJ and a qualified power systems professional before making compliance decisions. Buffalo Power Solutions is happy to be part of that conversation.