What are the structures of wires and cables composed of?

The structural components of wires and cables are: insulation protection layer, shielding layer, and wire core, among which the insulation layer can ensure electrical energy output and is an indispensable part of wires and cables. So how to distinguish the quality of wires and cables? Let's explain it to you below.

Method for distinguishing the quality of wires and cables:

The surface shows a regular "unevenness" of the mesh inside the compression, indicating good processing technology and no relative sliding, making it a good cable. The appearance is smooth, and the "unevenness" of the pressed mesh cannot be seen. The sheath feels loose when pinched by hand, which is poor for cables;