Why Does The Cable Conductor Turn Black

The copper wire of the wire and cable is generally shiny, the color looks bright, such a wire and cable is of good quality. However, seeing that the surface of some wires and cables copper wire is black, it is considered to be of poor quality, and this is not excluded. However, why do wires and cables turn black? Do we know what the reason is?

Let's get straight to the point! The cause of blackening of wires and cables is simply summarized as "water ingress, moisture, and air intrusion of wires and cables". The reason why the copper wire of the wire and cable is blackened is because the wire and cable is blackened by a humid environment or rainwater intrusion into the cable conductor during production, transportation, storage, laying and other uses, so that the copper conductor reacts with oxygen and water and turns black. This is one of the main causes of blackening of wires and cables, therefore, our wires and cables should be prepared for water ingress, moisture, and air intrusion.

There are also some technical operations that we should also pay attention to, otherwise it will also cause the copper wire of the wire and cable to be blackened. In the process of laying and installation, we do not seal the joints of the wires and cables or handle them improperly when cutting the wires and cables, which will lead to oxidation of the water ingress of the wires and cables, resulting in black hair on the copper wires of the wires and cables.

Do a good job of moisture-proof measures in a humid environment, such as direct burial or at the cable joint in the pipe, if the cable joint used is unqualified or made in a humid environment, the joint will enter the water or mixed with water vapor, and it will be black after a long time.

It is normal for wires and cables to blacken after a period of use, because we have not dealt with it properly. When we go to purchase, if we find that there are wires and cables that are blackened, Xiaobian recommends communicating with the merchant to understand the situation and avoid buying poor quality wires and cables.