How does the cable sheath qualify?

I. How can the cable sheath be considered qualified? The role of the cable sheath is to protect the insulated core of the cable from damage under external forces, and play a protective role. If the thinnest point of the cable sheath does not meet the requirements, the cable sheath will be damaged before reaching the normal greater external destructive force. Sheath is the appearance of the cable, the requirements of smooth rounded, glossy uniformity, no eccentricity (not exceeding the prescribed deviation), no mechanical damage, flattening, no visible debris. Air bubbles. Blisters, sand holes, particles obvious. Bamboo shape. Twist shape, etc. In addition to the above quality requirements, the thickness of the sheath also has a certain impact on the quality of the cable. If the production of cable sheath thickness is lower than the standard requirements, it is unqualified, if the thickness exceeds the standard requirements, it is unqualified. For example: cable model DLD-KYJV223 * 1.5mm2, measuring the average thickness of the sheath thickness of 1.7mm, this model, such as reference to GB9330-88 standard requirements, the thickness should be 1.2mm.

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