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UL 3111
An Underwriters Laboratories standard that has been replaced by UL 61010B-1. This updated standard outlines safety requirements for electrical equipment intended for professional, industrial, and educational use; the standard also encompasses any accessories that will be used with this equipment. Under UL 61010B-1, products must protect the operator and surrounding areas from electrical shocks and burns, high temperatures, mechanical hazards, the spread of fire, radiation, outgassing, and explosion/implosion.