What is UL Listing?
UL Listing means that UL has tested representative samples of the product and determined that it meets UL’s requirements. These requirements are based primarily on UL’s published and nationally recognized Standards for Safety.
Functional safety is that part of overall safety which depends on the correct functioning of safety related control systems and software. A functional safety investigation involves the evaluation of a safety critical circuit(s) in accordance with declared safety ratings relating to software, hardware, environmental stress factors (such as EMC) and safety lifecycle management processes.
Why UL Marking Compulsory:
The U.S. system of safety includes standards developing and certification organizations (such as UL), enforcement authorities (AHJs), installation code developers (such as NFPA), federal agencies (such as OSHA), installers and manufacturers. Each of these groups plays an important role, and safety is important to each of them. When we all work together, the result is safer products and installations. This has been the central mission for UL for the last 114 years, and is reflected in everything we do.