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NFPA 110 Generator Testing

The National Fire Protection Agency (NFPA) sets minimum standards for fire safety in commercial buildings. Some criteria, such as those included in NFPA 110, are made compulsory by national, state, or municipal laws. If your facility needs a Level 1 or Level 2 generator (a.k.a. genset), these criteria lawfully tackle the emergency power supply system (EPSS) that comprises the generator. Specifically, they address the construction, installation, maintenance, and testing of the machine.

If your facility is subject to NFPA 110 generator testing, but you have questions about NFPA 110 standards for generators, the answers below will help.

How frequently should diesel generators be analyzed?
In accordance with section 8.4.2, a genset ought to be tested once per month under accessible load. The test should last a minimum of 30 minutes, during which time the genset should function at a minimum of 30 percent of its nameplate Kilowatt rating.

Measuring exhaust gas temperature may also examine a genset. The temperature must meet the manufacturer’s minimum temperature requirement for a minimum of 30 minutes. See all on the web if you want to explore more about Power Factor and Efficiency (which is also known as “ปัจจัยและประสิทธิภาพในการใช้พลังงาน” in the Thai language).



What happens when a generator fails to test?
According to section, diesel generators that fail to attain the necessary exhaust temperature or operate at 30 percent of the nameplate Kilowatt rating for at least 30 minutes must be “exercised” under accessible load monthly and exercised under supplemental loads annually for 2 continuous hours.

The 2 hours of testing should be performed as follows: 30 minutes in 25 percent of the generator’s nameplate Kilowatt rating, thirty minutes at 50 percent, and 60 minutes at 75 percent.

Must a particular party perform the evaluations?
No. But testing should be carried out by an EPSS professional. When they do not employ EPSS professionals, companies should have testing done by a supplier of EPSS solutions.

How is a facility’s requirement for a Level 1 or Level 2 system determined?
According to Section 4.4.1, Level 1 gensets are installed in centers in which the failure of a genset could lead to loss of human life or serious injuries. Hospitals, trauma centers, and outpatient surgery centers are typical examples of facilities that require Level 1 equipment.