The state has explicitly used copper conductors in new homes. But the same is the copper wire, there are also inferior copper wire, the copper core is made of recycled copper, contains many impurities, and some of the inferior copper wire is not as conductive as the wire, which is easy to cause electrical accidents. At present, there are many types of wires on the market, many specifications, and chaotic prices. It is very difficult for consumers to choose. In terms of the price of two kinds of copper core wires of 2.5 square millimeters and 4 square millimeters commonly used in home decoration, the same specification of one wire, because of different manufacturers, the price can vary by 20% to 30%. As for the quality of the quality, the length is up to standard, consumers are more difficult to determine.
According to industry sources, the reason why the price difference of the wire is huge is because the raw materials used in the production process are not caused by the frequency conversion cable. The main raw materials for the production of electric wires are electrolytic copper, insulating materials and sheathing materials. At present, the electrolytic copper in the raw material market is about 50,000 yuan per ton, and the recovered copper is only about 40,000 yuan per ton; the price of high-quality products of insulating materials and sheathing materials is 8,000 yuan to 10,000 yuan per ton, and defective products. The price is only 4,000 yuan to 5,000 yuan per ton, and the difference is even more disparity. In addition, the length is insufficient and the amount of glue contained in the insulator is insufficient, which is also an important cause of price difference. The length of each line is 100 meters, and the defective product is only about 90 meters; the insulation containing rubber is 35% ~ 40%, and the defective product is only 15%.