TDS PDF

Cover Plates for Flush-Mounted Wiring Devices (Edition 3, October 13, 2025). Original standard UL 514D 2025-10 in PDF full version. Additional info + preview on request

Document status: Active

Electrical Resistance Trace Heating for Commercial Applications (Edition 2, July 17, 2015). Original standard UL 515 2015-07 in PDF full version. Additional info + preview on request

Document status: Active

Heat Detectors for Fire Protective Signaling Systems (Edition 7, published February 19, 1999; revisions through March 24, 2021). Original standard UL 521 2021-03 in PDF full version. Additional info + preview on request

Document status: Active

Heat Detectors for Fire Protective Signaling Systems (Edition 8, published December 11, 2024; revisions through October 24, 2025). Original standard UL 521 2025-10 in PDF full version. Additional info + preview on request

Document status: Active

Flame Arresters (Edition 8, published May 9, 2008; revisions through October 13, 2017; ANSI reaffirmation 2017). Original standard UL 525 2017-10 in PDF full version. Additional info + preview on request

Document status: Active

Flexible Metallic Hose (Edition 10, published December 5, 2014; revisions through December 10, 2019). Original standard UL 536 2019-12 in PDF full version. Additional info + preview on request

Document status: Replaced by St UL 536 2021-08