In the wire and cable DC resistance of the detection, the main is to detect the actual conductive wire and cable situation. Therefore, the DC resistance of the data can directly reflect the wire and cable materials in the good and bad and the main wire and cable conductivity level.
　　In the actual test, when the width of the actual cross-section of the wire and cable is equal, then the more the wire and cable through the wire and cable that the greater the resistance, otherwise the smaller.
　　In addition, the current is equal to the case, the better conductive effect of the wire and cable that its material the better and worse then the worse. In the country for the wire and cable standards in the clear provisions of the conductor at twenty degrees Celsius is the largest resistance, which proves that the resistance of the detection, when the wire and cable at the same time at twenty degrees Celsius, the resistance value of the more Close to the standard value of the sample that the more qualified, otherwise it will be substandard products.
　　In addition, in the DC resistance detection, the main application method on the bridge method and the current method of two basic detection methods. Bridge method is divided into single-arm bridge method and double-arm bridge method.