The outermost layer of wire and cable is generally rubber or rubber composite sets, the role of this layer is insulated, but also from the protection of the cable from the role of injury.

If the cable is high pressure or low voltage cable, if it is high pressure, there will be a layer of similar resin filler, which is the role of insulation, in the high-voltage cable, this layer is the most important part of insulation. There is no such thing as low pressure. And then there will be something like a ribbon around the same thing, which is to fix the cable each core, the middle of the gap filled.

As for the shielding layer, in two cases, the role of the power cable shielding layer are:

1. Because the power cable through the current is relatively large, the current will produce a magnetic field around, in order not to affect other components, so the shielding layer can shield the electromagnetic field in the cable.

2. Can play a certain role in grounding protection, if the cable core damage occurs, the leakage of current can follow the shield flow, such as grounding network, play a role in security protection.

If the control cable, no other difference, but in many places, especially the computer system control cable, where the shield is used to shield the external impact, because its own current is very weak, very afraid of the external electromagnetic field effects.

The above is a brief introduction to the role of power cable shielding, learn more about the power cable content, please pay attention to kingsignal official website.