Standard on Stored Electrical Energy Emergency and Standby Power Systems
What is NFPA 111?
This standard covers performance requirements for stored electrical energy systems providing an alternate source of electrical power in buildings and facilities in the event that the normal electrical power source fails. Systems include power sources, transfer equipment, controls, supervisory equipment, and accessory equipment needed to supply electrical power to the selected circuits.
Official document scope
What does NFPA 111 address?
NFPA 111 presents installation, maintenance, operation, and testing requirements as they pertain to the performance of the stored emergency power supply system (SEPSS) up to the load terminals of the transfer switch. Specific topics include definitions of the classification of SEPSS; energy sources, converters, inverters, and accessories; transfer switches and protection; installation and environmental considerations; and routine maintenance and operational testing.