Updated: October 29th, 2018

For more than a century, the UL mark has helped inspire confidence in a product’s safety and quality. For UL, facilitating the standards development process, developing standards and certifying to those standards helps ensure that quality starts at the component level.

UL is a premier global independent safety science company that has championed progress for more than 120 years. By working with industry stakeholders and Standards Technical Panels (STPs), UL develops safety standards across a multitude of industries.

UL has evaluated and certified millions of common electrical products, which bear its famous mark: The letters UL inside of a circle. That mark signifies that the product has been tested and meets a stringent set of standards that help ensure public safety. Today upwards of 22 billion products a year enter the marketplace bearing the UL mark.

UL also tests and certifies chemicals, inspects factories, and evaluates clinical services, among many other functions. These include inspection, auditing, advisory, software and training services. The organization evaluates electronics for fire, shock, and other risk factors. As products continue to evolve, the testing processes set by UL keep pace, and the organization partners with the electronics components industry to help ensure that components ultimately contribute to the overall safety and reliability of end products.

Additionally, UL tests and certifies wiring devices, which includes the connection, routing,