Emergency Power Systems That Work When Your Facility Needs Them Most.

NFPA 99 establishes requirements for essential electrical systems in healthcare facilities, defining three branch categories: the life safety branch, the critical branch, and the equipment branch. Each branch must be supplied by the emergency power system and must restore power within defined timeframes after a utility failure. The code also specifies generator capacity, automatic transfer switch performance requirements, testing intervals (monthly load testing for a minimum of 30 minutes, annual testing for a minimum of 2 hours), and documentation requirements. Compliance with these standards is evaluated during AHCA inspections and Joint Commission surveys.

NFPA 110 requires monthly generator testing under load for a minimum of 30 minutes. Healthcare facilities under NFPA 99 have additional requirements, including annual testing for a minimum of 2 hours at not less than 30% of nameplate rating. All tests must be documented, and the documentation must be available for inspection. Our team provides generator testing programs that meet both NFPA 110 and NFPA 99 requirements, with written documentation after each test.

An automatic transfer switch (ATS) is the device that detects a utility power failure and automatically switches the facility's electrical load to the emergency generator — without requiring manual intervention. The speed and reliability of the transfer are critical: NFPA 99 requires that essential electrical systems in healthcare facilities restore power within 10 seconds of a utility failure. ATS units require regular testing and maintenance to confirm they will perform correctly when needed.