NFPA 111-2019 PDF Download

The NFPA 111-2019 standard aims to ensure the reliability and safety of stored emergency power supply systems (SEPSS). The standard applies to any facility or building where an Uninterruptable Power Supply (UPS) is necessary in the event of a disruption in the normal utility power supply. This includes industries such as finance, IT, and certain areas of healthcare where continuous emergency power is legally required and power losses are unacceptable, even for short durations.

One of the main focuses of the standard is to improve life safety by addressing the common cause of failure in SEPSS, which is poor battery system maintenance. NFPA 111 includes comprehensive requirements for the installation, maintenance, operation, and testing of SEPSS. It covers various components of the systems, including power sources, transfer equipment, controls, supervisory equipment, and accessory equipment needed to supply power to selected circuits.

In the 2019 edition, the standard has been revised to enhance usability by covering the interruption time without reference to specific types of SEPSS. This makes the standard applicable to a wider range of systems and ensures that the interruption time is properly addressed.