Products bearing either an ETL mark or a UL mark have been certified by a Nationally Recognized Testing Laboratory, or NRTA, as compliant with the relevant minimum safety standards for that product. NRTLs are certified b... More »

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To receive the Electrical Testing Laboratories, or ETL, mark, a product must prove its compliance to North American consumer safety standards and pass inspection by a Nationally Recognized Testing Laboratory, or NRTL. To... More »

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ETL listing means that Intertek has determined a product meets ETL Mark safety requirements.. UL listing means that Underwriters Laboratories has determined a product meets UL Mark safety requirements. Silk-screened on p... More »

ISO standards include various sets of guidelines and instructional practices that cover processes such as quality assurance, environmental management, emergency service management, country codes and occupational safety. ... More »

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Products that are UL-approved carry the "UL Listed" mark and have passed government-regulated safety tests performed by Underwriters Laboratories. The mark is most often seen on electrical equipment to show that it meets... More »

A UL rating refers to a product safety classification provided by the UL company. UL tests the safety of appliances and other items. Products that meet UL's standards can carry the statement "UL Listed" or "UL Classified... More »

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NSF International and Underwriter's Laboratories, or UL, are separate organizations dedicated to safety standards in a variety of fields. NSF International is an independent third-party nonprofit specializing in public h... More »

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