The insulation layer of a cable mainly plays the following important roles:

1. Prevent current leakage

The insulation layer can effectively prevent current leakage from the conductor to the outside, preventing short circuits and electric shock risks.

2. Ensure safety

Insulation materials can protect users and equipment from electrical faults, ensuring the safety of cables.

3. Improve signal quality

In signal transmission cables, insulation layers can reduce signal crosstalk and interference, maintaining signal integrity and clarity.

4. Corrosion resistance and moisture resistance

Many insulation materials have good chemical corrosion resistance and moisture resistance, which can protect conductors from damage in harsh environments.

5. Thermal isolation

The insulation layer can also provide a certain degree of thermal isolation, helping the cable operate normally under high temperature working conditions and preventing damage caused by overheating.

6. Mechanical protection

The insulation layer provides a certain mechanical protection for the cable, resisting external impacts, friction, and tension.

7. Electrical isolation

The insulation layer can isolate adjacent conductors and prevent mutual interference, especially in multi-core cables.