One Minute To Understand The Role Of Cable Shielding

The outer layer of the wire and cable is generally rubber or rubber composite sheath, the function of this layer is to insulate, but also to protect the cable from damage.

The cable is divided into high-voltage or low-voltage cables. If it is high-voltage, there will be a layer of resin-like filler inside, which serves as insulation. In high-voltage cables, this layer is an important part of insulation. There is no such thing in low pressure. Then there will be something like ribbon wrapped inside, which is to fix each core of the cable and fill the gap in the middle.

What are the functions of the cable shielding layer?

  1. Because the current through the power cable is relatively large, a magnetic field will be generated around the current. In order not to affect other components, the electromagnetic field can be shielded in the cable by adding a shielding layer.
  2. It can play a certain role in grounding protection. If the cable core is damaged, the leaked current can flow along the shielding layer, such as a grounding net, to play a protective role.
  3. If it is a control cable, nothing else is different, but in many places, especially the control cable of a computer system, the shielding layer here is used to shield external influences, because its own current is very weak, and it is very afraid of external electromagnetic fields.

Through the above introduction, do you have a deeper understanding of the role of cable shielding?

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