... . Widely used in Heating element in appliances where totally enclosed. UL 3223 Silicone wire Style 3223Insulated Wire Rating150 deg C, 300 ... mils minimum at any point. See facing page for compound identification. StandardAppliance Wiring Material UL 758. MarkingGeneral. UseFor use only as Refrigerator ... , blue, red, black, brown, yellow, green, transparent, yellow/green, etc UL 3223 Silicone wire