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UL 1446 Ed. 8-2016

Standard for Systems of Insulating Materials - General - Published Date: July 24, 2025

These requirements cover test procedures to be used in the evaluation of Class 120(E) or higher electrical insulation systems (EIS) for use in the United States, and Class 130(B) or higher EIS for use in Canada, where the thermal factor is the dominating aging factor. These requirements also cover the investigation of the substitution of non-electrical insulating materials (NIM) components of insulation in a previously evaluated insulation system and also the test procedures to be used in the evaluation of magnetwirecoatings,magnetwires,andvarnishes.

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Underwriters Laboratories [ul]

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