The national standard copper core wire is often used in engineering and small decoration, and is produced according to the national use requirements.
1. Appearance standard: the wire must have CCC certification mark, manufacturer's company name and address, contact number, wire diameter, rated voltage, certification number, production date, inspector's seal, and length. Yellow green insulation layer for ground wire (double color wire)
2. If the copper conductor is oxygen-free copper, the insulation material shall be flame retardant PVC or cross-linked PVC.
3. Insulation (generally greater than 100m Ω) and withstand voltage strength (1500V below 500V) of sheath
4. Line resistance (not more than a certain resistance under a certain wire diameter, conductivity and length)
5. The wire shall not crack under high temperature impact of 150 ℃ and low temperature of - 30 ℃

1. Low resistivity: the resistivity of aluminum core cable is about 1.68 times higher than that of copper core cable.
2. Good ductility: the ductility of copper alloy is 20-40%, that of electrical copper is more than 30%, and that of aluminum alloy is only 18%.
3. High strength: the allowable stress of copper at normal temperature is 7 ~ 28% higher than that of aluminum. Especially the stress under high temperature, the difference between the two is very far.
4. Fatigue resistance: aluminum is easy to break after repeated bending, while copper is not. In terms of elastic index, copper is about 1.7-1.8 times higher than aluminum.
5. Good stability and corrosion resistance: copper core is resistant to oxidation and corrosion, while aluminum core is susceptible to oxidation and corrosion.
6. Large current carrying capacity: due to low resistivity, the allowable current carrying capacity (maximum current that can be passed) of copper core cable with the same section is about 30% higher than that of aluminum core cable
7. Low voltage loss: due to the low resistivity of the copper core cable, the voltage drop of the copper core cable is small when the same current flows through the same section. Therefore, the same transmission distance can ensure high voltage quality; In other words, under the allowable voltage drop condition, the copper core cable transmission can reach a long distance, that is, the power supply coverage area is large, which is conducive to the network planning and reduces the number of power supply points.
8. Low heating temperature: under the same current, the heating capacity of copper core cable with the same section is much smaller than that of aluminum core cable, which makes the operation safer.
9. Low energy consumption: due to the low resistivity of copper, compared with aluminum cable, the power loss of copper cable is low, which is obvious. This is conducive to improving power generation utilization and protection

Kunming Hengshuntong Wire and Cable Co., Ltd. was founded in 2005, after more than ten years of development, has developed into a collection of wire and cable research and development, production, sales, service as one of the modern enterprises, the company is located in the beautiful spring city of Kunming City Dabanqiao, close to the airport expressway new 320 national highway, convenient transportation, The company has a construction area of 12,000 square meters, strong technical force, modern production lines and advanced testing equipment.
Kunming hengshun wire and cable co., LTD., is important in yunnan province wire and cable manufacturing enterprises, has passed the IS09001 quality management system certification, high-tech enterprises, AA grade credit enterprise, USES the international standard certificate, the national industrial products production license, the China national mandatory product CCC certification, and won several national provinces and cities RongYing and award. Our main products are: cross-linked power cable, low smoke zero halogen power cable, fire-resistant power cable, control cable, shielded control cable, rubber sets of cables, overhead insulated cables, copper wire, aluminum wire, twisted pair, sheathed wire, special specifications can be customized, the products are widely used in electric power communication, metallurgical construction and other industries.
The company in line with the principle of "good core" cable, "quality and electricity saving", adhere to the "integrity, dedication, sharing, win-win" business philosophy, as always sincerely look forward to working with friends from all walks of life sincere cooperation, mutual benefit, common development, create a brilliant future.

Yang Cigui

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