The flat wire cable working temperature: with -90 suffix type wire long-term allowable working temperature should not exceed 90 ℃, other models of long-term allowable operating temperature of the wire should not exceed 70 ℃. When the use of the cable environment to prevent the thermoplastic flow and allow to reduce the insulation resistance of the case, can be used continuously at 90 ℃ PVC mixture, in shortening the total working time under the premise of its working temperature can be increased to 105 ℃.