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UL 515A Ed. 2-2019
Outline of Investigation for Electrical Resistance Trace Heating and Associated Controls for Use In Sprinkler and Standpipe Systems - Published Date: April 10, 2020
These requirements cover electrical resistance trace heating and associated accessories and controls for use in fire sprinkler and standpipe systems. This equipment is intended for installation in accordance with the manufacturer's installation instructions and the applicable requirements of the following standards:
Underwriters Laboratories [ul]