What is a UL listing and why is it important?

“UL” is an abbreviation for Underwriters Laboratory; an international corporation that tests appliances and devices to ensure that they meet minimum safety and design standards. There are other corporations that test appliances and devices (e.g., ETL) however their standards are lower than UL’s. George Mason University only allows appliances that are approved by UL and posses the appropriate UL markings.

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