... 4. Widely used in Internal Wiring for use in Heaters. UL 3590 Silicone temperature wire Style 3590Insulated Wire Rating200 deg C, 300 ... average, 13 mils minimum at any point. StandardAppliance Wiring Material UL 758. MarkingGeneral. UseInternal Wiring for use in Heaters, Crankcase and ... , blue, red, black, brown, yellow, green, transparent, yellow/green, etc UL 3590 Silicone high temperature wire