How to identify the inferior wire and cable 1. Try. It is advisable that a wire head be repeatedly bent by hand, and that any product that has soft hand feeling, good fatigue resistance, plastic or rubber feel elasticity, and no crack on the wire insulation body is superior.
2, weigh. Good quality wires are generally within the specified weight range. Such as the commonly used cross-sectional area of ​​1.5mm2 plastic insulated single strand copper wire, weight per 100m of 1.8 ~ 1.9kg; 2.5mm2 plastic insulated single strand copper wire, weight per 100m 3 ~ 3.1kg; 4.0mm2 plastic Insulated single-stranded copper wire weight is 4.4-4.6kg per 100m. Poor quality wires have insufficient weight or are either of insufficient length or have too many impurities in the wire copper core.
4, than the price. Because of the low cost of producing counterfeit and inferior wires, when selling, traders often sell cheap products at low prices, making people fooled. The mining cable is the abbreviation of the cable for coal mining. The mining cable is a flame-retardant cable. Both of them are issued with safety certificates of mine products through the National Safety Center for Mine Products. Look at the copper. Qualified copper core wire copper core should be purple, shiny and soft to the touch. The shoddy copper core copper core is purple-black, yellowish or white, with many impurities, poor mechanical strength, and poor toughness. It will break when it is hardened, and the wire is often broken. When checking, you just strip the wire 2cm, and then use a piece of white paper on the copper core to make a brief look. If there is black material on the white paper, the copper core contains more impurities.
How to identify the advantages and disadvantages when purchasing electric wires The country has clearly stated that copper conductors should be used in new houses. However, copper conductors, as well as inferior copper conductors, have copper cores that use recycled copper and contain many impurities. Some poor-quality copper conductors are even less conductive than iron wires and can easily cause electrical accidents. At present, there are many kinds of wires on the market, many specifications, and prices are chaotic. It is very difficult for consumers to choose. In terms of the prices of 2.5 square millimetres and 4 square millimetres of two kinds of copper wires that are commonly used in home decoration, the price of one line of the same specification may vary by 20% to 30% because of different manufacturers. As for the quality, whether the length is up to standard, consumers are even more difficult to determine.
According to industry sources, the reason why the prices of wires are so different is that they are caused by different raw materials used in the production process. The main raw materials for producing wires are electrolytic copper, insulating materials and sheathing materials. At present, the raw material market has about 50,000 yuan per ton of electrolytic copper, and the recycled copper scrap is only about 40,000 yuan per ton; the high-quality products for insulating materials and sheathing materials cost between 8,000 and 10,000 yuan per ton. The price of only 4,000 yuan to 5,000 yuan per ton, the difference is even more disparity. In addition, the lack of length and inadequate insulation of the insulators are also important reasons for price differences. The length of each line, excellent products is 100 meters, while the defective product is only about 90 meters; the insulation content of excellent products accounted for 35% to 40%, while the defective product is only 15%. By contrast, it is not difficult for consumers to see that the difference in the sales price of finished wire is due to the presence of tricky materials.
2, weigh. Good quality wires are generally within the specified weight range. Such as the commonly used cross-sectional area of ​​1.5mm2 plastic insulated single strand copper wire, weight per 100m of 1.8 ~ 1.9kg; 2.5mm2 plastic insulated single strand copper wire, weight per 100m 3 ~ 3.1kg; 4.0mm2 plastic Insulated single-stranded copper wire weight is 4.4-4.6kg per 100m. Poor quality wires have insufficient weight or are either of insufficient length or have too many impurities in the wire copper core.
4, than the price. Because of the low cost of producing counterfeit and inferior wires, when selling, traders often sell cheap products at low prices, making people fooled. The mining cable is the abbreviation of the cable for coal mining. The mining cable is a flame-retardant cable. Both of them are issued with safety certificates of mine products through the National Safety Center for Mine Products. Look at the copper. Qualified copper core wire copper core should be purple, shiny and soft to the touch. The shoddy copper core copper core is purple-black, yellowish or white, with many impurities, poor mechanical strength, and poor toughness. It will break when it is hardened, and the wire is often broken. When checking, you just strip the wire 2cm, and then use a piece of white paper on the copper core to make a brief look. If there is black material on the white paper, the copper core contains more impurities.
How to identify the advantages and disadvantages when purchasing electric wires The country has clearly stated that copper conductors should be used in new houses. However, copper conductors, as well as inferior copper conductors, have copper cores that use recycled copper and contain many impurities. Some poor-quality copper conductors are even less conductive than iron wires and can easily cause electrical accidents. At present, there are many kinds of wires on the market, many specifications, and prices are chaotic. It is very difficult for consumers to choose. In terms of the prices of 2.5 square millimetres and 4 square millimetres of two kinds of copper wires that are commonly used in home decoration, the price of one line of the same specification may vary by 20% to 30% because of different manufacturers. As for the quality, whether the length is up to standard, consumers are even more difficult to determine.
According to industry sources, the reason why the prices of wires are so different is that they are caused by different raw materials used in the production process. The main raw materials for producing wires are electrolytic copper, insulating materials and sheathing materials. At present, the raw material market has about 50,000 yuan per ton of electrolytic copper, and the recycled copper scrap is only about 40,000 yuan per ton; the high-quality products for insulating materials and sheathing materials cost between 8,000 and 10,000 yuan per ton. The price of only 4,000 yuan to 5,000 yuan per ton, the difference is even more disparity. In addition, the lack of length and inadequate insulation of the insulators are also important reasons for price differences. The length of each line, excellent products is 100 meters, while the defective product is only about 90 meters; the insulation content of excellent products accounted for 35% to 40%, while the defective product is only 15%. By contrast, it is not difficult for consumers to see that the difference in the sales price of finished wire is due to the presence of tricky materials.
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