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Glossary

UL (Underwriters Laboratories)

The Underwriters Laboratories (UL) is an independent organization that tests and certifies products with regard to their safety. For sealing systems in the switch cabinet industry, UL50 and UL50E approvals play a particularly important role. In addition, the UL94 approval is of great importance. This examines the fire behaviour of solid materials, films and sealing foams.