The state has stipulated that copper wires should be used in newly built houses. But it is also a copper wire, and there are also inferior copper wires. The copper core is made of recycled copper, which contains many impurities. Some of the inferior copper wires are not as conductive as iron wires, which is very likely to cause electrical accidents. At present, there are many types of wires, many specifications, and chaotic prices on the market, making it difficult for consumers to select. As far as the prices of the 2.5 square millimeters and 4 square millimeters of copper core wires commonly used in home decoration are concerned, the same specification of a coil of wire can vary by 20% to 30% because of the different manufacturers. As for the quality, whether the length meets the standard, consumers are even more difficult to determine.
According to industry sources: The reason why the price difference of the wires is huge is that the raw materials used in the production process are not caused by the frequency conversion cables. The main raw materials for producing electric wires are electrolytic copper, insulating materials and sheath materials. At present, the electrolytic copper in the raw material market is about 50,000 yuan per ton, and the recycled 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 to 10,000 yuan per ton, and the defective products The price is only 4,000 yuan to 5,000 yuan per ton, and the price difference is even wider. In addition, insufficient length and insufficient glue content of the insulator are also important reasons for the price difference. For each cable length, the superior product is 100 meters, and the defective product is only about 90 meters; the insulator with a rubber content of 35% ~ 40%, and the defective product is only 15%.
