What effect does the sheath thickness have on the quality of the cable?

- Dec 22, 2020-

What effect does the sheath thickness have on the quality of the cable?

The quality of the product can be reflected in the appearance quality of the product first. Regardless of the product, the appearance quality must be emphasized in the production, and strict control and inspection shall be implemented.

The appearance of the cable sheath is required to be smooth and round, uniform in gloss, not eccentric, no mechanical damage, no visible debris, bubbles, sand holes, particles, bamboo joints, twists, etc. In addition to meeting the above quality requirements, the thickness of the sheath also has some influence on the quality of the cable.


1. Reduce the service life: After the cable is laid, it will be energized for a long time, and the power will generate heat. If the working temperature will rise in summer, these temperatures will be emitted through the outer sheath, and the thickness of the sheath will increase, making the heat difficult. Emissions will affect the service life of the cable, cause the insulation performance to decrease, lose the original performance, and affect the normal use of the cable.

2. Material performance problem: The material performance is not reflected by the thickness. For cables of the same specification, if the cable is too thick, it means that the insulation may contain bubbles or impurities. If there are bubbles, it means that the material or conductor may have Moisture, the use of such cables will seriously affect the mechanical strength and shorten the service life.

3. The cable structure has problems: if the conductor, insulation layer, and braid density are controlled in accordance with the standard requirements, if the outer diameter of the cable is normal but the sheath is too thick, then other structures may be cutting corners.

4. Increase the difficulty of cable laying: nowadays, cable laying is mainly based on bridges or pipes. Now many companies are implementing tight cable requirements and small outer diameters. There can be gaps during the laying process, which can dissipate heat and make the outer sheath of the cable not Otherwise, it will bring difficulties to the construction unit and cable laying.

In the process of cable production, it should be controlled in accordance with standards to save resources, reduce material consumption, and increase profits for the enterprise, while ensuring cable quality.