The quality of the relationship between the thickness of the wire sheathing line

The appearance of the cable sheath, the appearance requirements are smooth and rounded, uniform gloss, not partial core (not to exceed a predetermined bias), no mechanical damage, flattening, no eyesight visible debris, bubbles, blisters, obviously particles, bamboo section shape, twist shape. Sheath addition to meeting the above quality requirements, the sheath thickness also have some impact on the quality of the cable. Sheath thickness is less than the standard requirements of course for the failure, but the thickness beyond the standard requirements, but also failed. For example: cable model ZR-KVVP 4 * 1.5mm2, as measured by the average thickness of the sheath thickness 1.6mm, such a model as reference GB9330-88 standards, thickness should be 1.2mm. Sentenced failure for the following reasons: (1) reduce the life. After cabling, will be long power, power will produce heat conductor working temperature of 70 ℃, PVC long-term use temperature should not exceed 65 ℃, if in the summer, temperature will rise, which will pass outside temperature sheath comes out, increasing the sheath thickness, difficult to distribute the heat, it will affect the cable life, because PVC by heat, so that the insulating layer series of physical and chemical changes, the loss of the original good performance , resulting in insulation performance degradation, and even short-circuit, affecting the normal operation of the unit. (2) material performance deficiencies. Through the thickness of the material properties are not reflected, according to GB8815-2002 standards, then it is not an indicator of a certain standard, fire retardant PVC material, then it oxygen index below 30. Problems (3) cable structure. If the conductor, an insulating layer, weave density, in accordance with standard control, select the appropriate filler to make it round, so how can jacket packed so thick it? (4) increase the difficulty of cable laying. Now cabling to bridge or through the main tube, and now many companies are requested to implement the cable tight, small diameter, in the laying process can have gaps, distributing heat to ensure that the cable sheath is not damaged, otherwise, to the construction unit and cabling bring some difficulties. In summary, the sheath thickness should be controlled in accordance with the standard, both for enterprises to save resources, reduce material consumption, increase profits, but also to ensure the cable quality, create quality and cheap products. 24-hour customer service hotline: If you are interested sheathed cable or have questions, please click on the Contact Us page on the right side of online customer service, or call: 4008-778-716, River marine cables - Your full intimate video cable The procurement of consultancy. Customer comments: If you read our website, temporarily not want to buy, it does not matter. Your visit is the fate, if you can online and talk to me, maybe I can help to you make the right choice, as an online customer, I always smile at the other end of your network. National Hotline: 4008778716 Mobile: 13321178838 Tel: 010-61718832 Fax: 010-60701668 E-mail: 13321178838@163.com QQ: 642688778 / QQ: 2054484746 Company Website: www.jhyxl.com Address: Baishan Town, Changping District, Beijing Lions camps industrial zone