Does Jacket Thickness Matter To Cable Quality?

We all know that the quality of the product is mainly reflected in the appearance quality of the product. In the production and processing, no matter what kind of goods, they attach great importance to the appearance quality, and have strict control and inspection. The jacket is the appearance of the wire and cable. Its quality standard must be uniform in smoothness, no eccentricity (not exceeding the specified error), no industrial equipment hazards, flattened, no visible dirt, bubbles, sand holes, and significant fine particles. , round bamboo shape, twist shape, etc. In addition to meeting the above quality standards, the thickness of the jacket has an important impact on the quality of the wire and cable. If the thickness of the jacket is lower than the specification, it does not meet the requirements, but if the thickness exceeds the specification, it is not up to the standard.

For example, the specification of the cable is P4*1.5mm2, and the average thickness of the jacket is 1.6mm. The thickness of this type of model should be 1.2mm according to the GB/T9330-2020 national industry standard. Unqualified power engineering cables generally lead to the following difficulties:

1. Reduce the service life After the cable is laid, long-term plug-in will also occur, which will lead to power energy. The allowable working temperature of the capacitor body is 70 °C, and the ambient temperature of high-voltage polyethylene for long-term application cannot be higher than 65 °C. If the working temperature is likely to rise in summer, the ambient temperature is likely to be released according to the outer sheath, the thickness of the sheath will also increase, the heat cannot be released, and the service life of the cable will also be reduced. Under the influence of heat, polyethylene causes a series of physical and chemical transformations in the insulating sleeve, which loses its original high-quality characteristics, resulting in a significant decrease in insulation performance, and even short-circuit failures, which endanger the normal operation of the generator set.

2. Material performance shortcomings The material performance is not reflected according to the thickness. According to the GB/T8815-2008 standard, a certain index value of it is not up to the standard, which is a serious harm to the fire resistance and aging characteristics, and the service life of the cable is shortened.

3. Insufficient electrical conductors, cable sheaths, and relative density of weaving in the cable structure, operate in accordance with standard standards, select appropriate fillers to make them shiny, so how can the grommets be squeezed so thick?

Fourth, improve the difficulty factor of cable laying. Nowadays, cable laying is mainly based on cable trays or threading pipes. Many companies are right that the quality of the cables is relatively strict. It is stipulated that the protective wire is tight and the diameter is small. Ensure the safe current carrying capacity of the cable and ensure that the outer sheath of the cable will not be damaged, otherwise, it will cause certain difficulties for the construction unit and cable laying. In general, the thickness of the grommet should be controlled according to the specifications, so that the enterprise can not only ensure the quality of the cable, produce high-quality and inexpensive products, but also ensure the rights and interests of customers. Although cables add greater convenience to people's lives, there are also many influencing factors that are difficult to control. The quality of wires and cables is directly related to the operational safety of the route. Once the route cannot operate safely and stably, its common failures will lead to daily Life and financial damage is hard to predict.