NFPA 111 – Standard on Stored Electrical Energy Emergency and Standby Power Systems: 2019 [pdf]
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NFPA 111 – Standard on Stored Electrical Energy Emergency and Standby Power Systems
This standard shall cover 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 covered in this standard shall 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 shall cover installation, maintenance, operation, and testing requirements as they pertain to the performance of the stored-energy emergency power supply system (SEPSS).
This standard shall not cover the following:
(1) Application of the SEPSS
(2) Distribution wiring
(3) Systems having total outputs less than 500 VA or less than 24 V or systems less than Class 0.033 in accordance with Section 4.3
(4) Unit equipment
(5) Nuclear sources, solar systems, and wind stored-energy systems
(6) Uninterruptible power systems (UPS) supplied by an emergency power supply system (EPSS) or a UPS supplied by an SEPSS
(7) Optional standby systems
The following shall not be within the scope of this standard:
(1) Specific buildings or facilities, or both, requiring an SEPSS
(2) Specific loads to be served by the SEPSS
(3) Type, class, or level to be assigned to any specific load (See Section 4.1.)
This standard shall provide performance requirements for SEPSS and also shall be used in conjunction with other standards.
It shall be the role of other NFPA standards to specify which occupancies require an SEPSS and the applicable level, type, and class.
This standard shall not specify where an SEPSS is required. (See 126.96.36.199.)
This standard shall provide guidance for inspectors, designers, installers, manufacturers, and users of an SEPSS and shall serve as a basis for communication between the parties involved.
This standard shall not be considered a design manual.
Compliance with this standard shall not absolve the parties involved of their respective responsibilities for the design, installation, maintenance, performance, or compliance with other applicable standards and codes.
The installation of a stored-energy system(s) conforming to this standard shall 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.