Who is Underwriters Laboratory (UL)?
Established in 1984, UL is not-for-profit third party organization that tests products in the interest of public safety. They are considered a leader in testing for North America. What is a UL standard? A UL standard is a list of minimum requirements developed via an open, non-exclusionary process for manufacturers to use in designing products. Compliance is voluntary; however, a standard is sometimes mandated by state and local requirements. How is UL standard applied? The standard is used as a basis to test products at a nationally recognized testing laboratory. Products that pass testing are “Listed” and received a “Mark.” When a product passes the tests, the manufacturer applies a label with special nomenclature on the product to identify it as a UL listed product. Can other laboratories be used for testing to UL standards? When a standard is defined, many interpretations are used to create the final testing requirements. Third party companies, such as ETL, must interpret the guide
