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How to truly distinguish the quality of cables and wires from inferior ones
It may be more difficult to detect foot movements in meters, as customers generally do not have equipment to actually measure meters. Similarly, using the weight measurement method can determine whether the cable is foot long. Alternatively, having the factory print the rice label during production is also a good method, but it should be noted that lines with a diameter less than 5mm cannot be printed with the rice label.
Zufang copper is a precious metal. If there is a slight loss in the copper diameter, it can reduce a lot of raw material costs, which requires the use of a micrometer to measure the diameter of the copper wire. If there is no micrometer, a simpler method is to weigh the entire roll of wire and see if it is much lighter than high-quality cables. Alternatively, you can refer to the nominal weight provided by the factory. Some factories give lower nominal weights, which naturally cannot guarantee product quality.
How to distinguish the quality inside wires and cables:
High quality copper cables use high-purity oxygen free copper, with a bright copper core color and a relatively dull surface for poor copper wire.
extruder
Plastic plastics use high-quality native plastics with good bending performance. When bending cables, no texture will be produced. Poor recycled plastics will show obvious texture after bending a few times, and fracture will occur after bending multiple times.
Cable equipment
In order to ensure the roundness of the cable, for multi-core cables, fillers are added to the core and the sheath thickness is relatively thick. If the cable in hand is not round, it indicates that there is very little filler added and the sheath is thin.
Cable equipment
During production, multiple strands of copper wire are bundled to improve the tensile performance, roundness, electrical performance, and tightness with the insulation layer of the copper core. However, due to the increased use of copper, many factories omit this step. The method of differentiation is to cut open the core wire of the cable and see if the copper wires inside are twisted together in a regular manner.
Weaving cables with copper mesh braiding layer accounts for a large part of the cable raw material cost, and the coverage of the braiding layer directly affects the electrical performance of the cable. At the same time, tight braiding layer can increase the strength of the cable and reduce the decrease in electrical performance of the cable in a bent state. So looking at whether the weaving layer has high coverage and uniform and dense weaving is an important means of distinguishing between good and bad cables.
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