TDS PDF

Cover Plates for Flush-Mounted Wiring Devices (Edition 2, published June 28, 2013; revisions through May 18, 2023). Original standard UL 514D 2023-05 in PDF full version. Additional info + preview on request

Document status: Replaced by St UL 514D 2025-10

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 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

Single and Multiple Station Heat Alarms (Edition 8, published June 23, 2022; revisions through January 14, 2025). Original standard UL 539 2025-01 in PDF full version. Additional info + preview on request

Document status: Active