How to identify the pros and cons of purchasing wires countries have explicitly should be used in new residential copper conductors. However, the same copper wire, there are also poor copper wire, copper use its recycled copper, contains many impurities, some inferior even better conductive properties of copper wire, can easily lead to electrical accidents. Currently, the market wires varieties, specifications, price chaos, consumers pick and choose very difficult. One commonly used for home decoration 2.5 mm2 and 4 mm2 two kinds of copper wire prices, the same specifications as a line, because different manufacturers, the price can vary from 20% to 30%. As for the quality of the merits, whether the target length, the consumer is even more difficult to determine. According to industry sources: Wire huge reason why the price difference is due to the raw materials used in the production process caused by different. Production of the main raw material is copper wire, insulation and sheathing. Currently on the market of raw materials at 50,000 yuan per ton, copper, and the recycling of scrap copper is only about 40,000 yuan per ton; insulation and sheathing materials of quality products price at 8,000 yuan per ton to 10,000 yuan, and defective products only 4,000 yuan per ton, the price to 5,000 yuan, the difference is more poor. In addition, the length of insufficient insulation gel content is not enough, also contributed to an important reason for the price difference. Each plate length, superior product is 100 meters, while defective only 90 meters; insulator Excellence gel content accounted for 35% to 40%, while only 15% of defective products. By contrast, consumers can easily see the differences in selling prices of finished wire is tricky due to the material on there. Cable breakdown test cable breakdown voltage test is a step by step l until the insulation breakdown, breakdown voltage cable calculated value. The purpose of these tests is to assess the ability of cable insulation withstand voltage between the voltage and the work safety margin. AC breakdown electric field strength is one of the important parameters cable design. Boost Speed ??AC breakdown strength and a great relationship, continuous boost breakdown of the cable in a few minutes is called the instantaneous breakdown, substantially no thermal factor that is part of the type of electrical breakdown. Therefore, wire and cable is generally not carried out such tests. Another step is step by step, from a low voltage (e.g., 0.5 to 2 times the operating voltage), the working time maintain adequate at this voltage level of the cable sufficiently to produce electricity and heat effect. Then rose to another voltage level. Progressively increased until the breakdown. Rising voltage at each level of the percentage of the number of initial pressure progressively increased. This test reflects the thermal breakdown factor. Such test results have a good reference value. Product characteristics in the study often used. Our solemn declaration: 1, signed product quality assurance and undertaking - substandard products not manufactured. Within two years, product quality tracking service, and customer service records in the archives of 20 years. 3 Ensure product quality problems, I will plant the warranty, refund, replacement, to meet customer requirements. Specifications: According to customer requirements Quantity: MOQ is 100 m, 100 m -200 m prices go up Packing: a few meters short of the disc packaging, a few meters long cable shaft packing Price Description: Phone negotiated price based on decline in copper prices go up at any time Updates Contact Sales Department (General Manager) Revise office phone number 15731627778 15731627778 landline 0316-5726723