Who or what is UL?

UL stands for Underwriters Laboratories Inc.® and is one of the world's leading product safety testing and certification organizations. It tests and certifies a wide variety of materials, components and end products for their operational safety, especially with regard to potential personal injury and the development of fires.

UL Mark

UL maintains a directory of more than 3 million products that are publicly available through online databases.

UL offers several certifications:

brand	Definition
	UL listing check character: Evidence that UL has tested representative samples of the applicable product and confirmed its compliance with UL's applicable safety requirements.	Connection-ready devices certified to U.S. and Canadian regulations e.g. limit switch with cable and connector.
		Connection-ready devices certified according to Canadian regulations e.g. limit switch with cable and plug
		Connection-ready devices certified to US regulations e.g. limit switch with cable and connector
	UL Recognized Component mark: Identifies UL Recognized Component parts that can be used in a product or system that bears the UL Listing Mark.	Devices intended for installation, certified in accordance with U.S. regulations
		Devices intended for installation, certified to Canadian regulations
		Devices intended for installation, certified to U.S. and Canadian regulations