NFPA 110, Standard for Emergency and Standby Power Systems (2025 Edition)

NFPA 110, Standard for Emergency (2025 Ed)

This standard outlines performance requirements for emergency and standby power systems that serve as alternative electrical power sources in buildings and facilities when the primary power supply fails. These systems consist of power sources, transfer devices, controls, monitoring equipment, and associated components necessary to deliver electricity to designated circuits.

They play a key role in enhancing occupant safety and ensuring reliable operation of emergency power systems. Up-to-date guidelines, detailed in the latest edition of NFPA 110—Standard for Emergency and Standby Power Systems—cover all essential elements, including power generation, switching mechanisms, control functions, supervision systems, and supporting electrical and mechanical equipment. The standard helps maintain system readiness and functionality when backup power is needed most.