How to distinguish the good and the bad when buying wires
The state has made it clear that copper wires should be used in new residential buildings. But the same copper wire, there are also inferior copper wires, the copper core is made of recycled copper, containing many impurities, and some inferior copper wires are even inferior to iron wires, which are easy to cause electrical accidents. There are many varieties of wires on the market, many specifications, and chaotic prices, which makes it very difficult for consumers to choose. In terms of the price of 2.5 square millimeters and 4 square millimeters of copper core wires commonly used in home decoration, the price of a coil of wire of the same specification can vary by 20%~30% because of different manufacturers. As for the quality and whether the length is up to standard, it is even more difficult for consumers to judge.
According to industry insiders, the reason for the huge price difference of wires is due to the different raw materials used in the production process. The main raw materials for the production of wires are electrolytic copper, insulating materials and sheath materials. In the raw material market, the electrolytic copper is about 50,000 yuan per ton, and the recovered miscellaneous copper is only about 40,000 yuan per ton; the price of high-quality products of insulating materials and sheath materials is 8,000 yuan ~ 10,000 yuan per ton, while the price of defective products is only 4,000 yuan ~ 5,000 yuan per ton, and the price difference is even greater. In addition, insufficient length and insufficient glue content of the insulator are also important reasons for the price difference. The length of each coil is 100 meters for the excellent product and only about 90 meters for the defective product, and the insulator has 35%~40% of the glue content, while the defective product is only 15%. Through comparison, it is not difficult for consumers to see that the difference in the sales price of finished wires is caused by the greasy material.
