Underwriters Laboratories

Established in 1894 as the Underwriters' Electrical Bureau, UL is a global safety consulting and certification company, approved to perform safety testing by the U.S. federal agency of Occupational Safety and Health Administration.

Documents by this publisher

Series details	Title	Year	Status
UL 427-11	Standard for refrigerating units	2011	Withdrawn
UL 429-13	Electrically operated valves	2013	Current
UL 430-15	Waste disposers	2015	Current
UL 437-13	Standard for key locks	2013	Current
UL 441-16	Standard for gas vents	2016	Current
UL 448-20	Standard for centrifugal stationary pumps for fire-protection service	2020	Current
UL 464-16	Audible signaling devices for fire alarm and signaling systems, including accessories	2016	Withdrawn
UL 464-23	Audible signaling devices for fire alarm and signaling systems, including accessories	2023	Current
UL 467-22	Grounding and bonding equipment	2022	Current
UL 486A-486B-18	Wire connectors	2018	Withdrawn
UL 486A-486B-25	Wire connectors	2025	Current
UL 489-16	Molded-case circuit breakers, molded-case switches, and circuit-breaker enclosures	2016	Withdrawn
UL 489-25	Molded-case circuit breakers, molded-case switches, and circuit-breaker enclosures	2025	Current
UL 498-17	Attachment plugs and receptacles	2017	Current
UL 499-14	Molded-case circuit breakers, molded-case switches, and circuit-breaker enclosures	2014	Current
UL 508-18	Industrial control equipment	2018	Withdrawn
UL 508-24	Industrial control equipment	2024	Current
UL 508A-18	Industrial control panels	2018	Current
UL 514A-13	Metallic outlet boxes	2013	Withdrawn
UL 514A-24	Metallic outlet boxes	2024	Current