scope:

PURPOSE AND SCOPE.

Unified Facility Criteria (UFC) 3-520-05 provides design criteria for stationary secondary battery installations. These batteries are operated on a continuous float charge and may require ventilation to limit hydrogen gas concentrations. This UFC also addresses \2\mobile/2/ lithium-based batteries that are stored or charged inside facilities.

This UFC serves as a planning, engineering, and design reference for professional facility planners, designers, and constructors, including DoD personnel and Government contractors. Designers and planners will use this document for individual project planning, for preparing engineering documentation, and for preparing contract documents for construction and renovation projects.

UFC Hierarchy.

UFC 3-501-01 provides the governing criteria for electrical systems, explains the delineation between the different electrical-related UFCs, and refers to UFC 3-520-01 for interior electrical system requirements. This UFC cites and supplements existing Government and commercial standards and specifications governing the architectural, mechanical, plumbing, and electrical requirements for design of stationary secondary battery installations.

Upgrades and Modifications to Existing Systems.

Modernization of electrical systems within existing facilities solely for the purpose of meeting design criteria in this UFC is not required. Upgrades or modifications of existing facilities should consider the design criteria in this UFC, but it is not intended that an entire facility require modernization solely because of a minor modification to a part of the facility.