The answer is 125° C. Irradiated PVC insulated jacket can withstand a maximum temperature of 125° C. Irradiated PVC has improved resistance to abrasion, cut-through, soldering and solvents. Irradiated PVC insulation has been specially compounded to provide a wire that has thermoset characteristics. Irradiated PVC insulation is Solder Iron Resistant and tougher than ordinary PVC