scope:

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. For emergency power systems supplied by emergency generators, see NFPA 110, Standard on Emergency and Standby Power system.

Systems covered in this standard include power sources, transfer equipment, controls, supervisory equipment, and accessory equipment, including integral accessory equipment, needed to supply electrical power to the selected circuits.

This standard covers installation, maintenance, operation, and testing requirements as they pertain to performance of the Stored Emergency Power Supply System (SEPSS).

Purpose.

This standard contains performance requirements for SEPSS and may also be used in conjunction with other standards. It is the role of other NFPA standards to specify which occupancies require a SEPSS and the applicability level, type, and class. This standard does not specify where SEPSS's are required. (See 1-1.4.2.)

This standard is also intended to provide guidance for inspectors, designers, installers, manufacturers, and users of SEPSS, and to serve as a basis for communication between parties involved. It is not intended as a design manual. Compliance with the standard is not intended to absolve the parties involved of their respective responsibilities of design, installation, maintenance, and performance or compliance with other applicable standards and codes.

The installation of stored energy system(s) conforming to this standard will ensure that alternate power is available to minimize life safety hazards resulting from power loss to certain continuous chemical or industrial processes, computer controlled systems, emergency lighting, and the like.