ULC 321

Standard for Burglary Resistant Vault Doors and Modular Panels (CAN/ULC S321-M91)
standard by Underwriters Laboratories of Canada, 05/01/1992

ULC 530

Standard for Heat Actuated Fire Detectors for Fire Alarm Systems (CAN/ULC S530)
standard by Underwriters Laboratories of Canada, 05/01/1991

ULC 639

Standard for Steel Liner Assemblies for Solid-Fuel Burning Masonry Fireplaces (CAN/ULC S639)
standard by Underwriters Laboratories of Canada, 04/01/2018

ULC 643

Shop Fabricated Steel Aboveground Utility Tanks for Flammable and Combustible Liquids (ULC S643)
standard by Underwriters Laboratories of Canada, 09/01/2004

ULC 526

Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories (CAN/ULC-S526:2016)
standard by Underwriters Laboratories of Canada, 01/01/2016