Copper core cables are widely used in various fields because of their excellent electrical conductivity, thermal conductivity and good mechanical strength, ensuring the safety and reliability of power transmission. The following is an introduction to copper as a conductor material.
1.Low resistivity: The resistivity of aluminum wire cables is approximately 1.68 times higher than that of copper wire cables.
2.Good ductility: The ductility of copper alloy is 20~40%, the ductility of electrical copper is over 30%, while the ductility 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 even greater.
4.Anti-fatigue: Aluminum is easy to break after repeated bending, but copper is not easy to break. In terms of elasticity indicators, copper is also about 1.7 to 1.8 times higher than aluminum.
5.Good stability and corrosion resistance: Copper wire is resistant to oxidation and corrosion, while aluminum wire is susceptible to oxidation and corrosion.
6.Large carrying capacity: Due to low resistivity, copper wire cables of the same cross-section have about 30%-50% higher carrying capacity (maximum current that can pass) than aluminum wire cables, especially as there are more and more household appliances. Home decoration basically uses copper wire.
7.Low voltage loss: Due to the low resistivity of copper wire cables, the same current flows through the same cross-section. Copper cables have a small voltage drop. Therefore, the same transmission distance can ensure higher voltage quality; in other words, under the allowed voltage reduction conditions, copper wire cable transmission can reach a longer distance, that is, the power supply coverage area is large, which is conducive to network planning and reduces The number of power supply points set.
8.Convenient construction:
① Copper wire has good flexibility and a small allowable bending radius, so it is easy to turn and thread through pipes;
② Copper wire is resistant to fatigue and is not easy to break after repeated bending, so wiring is convenient;
③ Due to the high mechanical strength of copper wire, it can withstand large mechanical tension, which brings great convenience to construction and laying, and also creates conditions for mechanized construction.
The disadvantages of copper wire as a cable material are the high price of copper wire and the large proportion of copper wire, both of which determine the high cost of copper wire. And copper wire is heavier, so overhead wires often use aluminum as the conductor material.
Cables that use copper as a conductor include but are not limited to home improvement wires, control cables, low-smoke halogen-free flame-retardant and fire-resistant cables, mineral-insulated fire-resistant cables, etc.
In terms of home decoration, copper conductors cables are widely used in wiring BV wires, BVR copper core flexible wires, RVV, RVVP power cords, shielded flexible wires, etc.
Including KVV control cables and KVVP control shielded cables also use copper conductors cables.
For high-rise buildings, hospitals and other crowded places, low-smoke, halogen-free, flame-retardant and fire-resistant cables are used, such as YJV/YJV22 cross-linked polyethylene insulated polyvinyl chloride sheath (armored or non-armored) high Low voltage cables, as well as mineral insulated cables BTTZ/BTTRZ/BBTRZ and other fireproof cables.
Among fire-resistant cables, common models include BTTZ, BTTRZ (RTTZ), BBTRZ, NG-A (BTLY), YTTW, BTTVZ, etc. These cables are high temperature resistant, fireproof, explosion-proof, non-combustible, etc., and are suitable for fireproof cables required by fire protection systems in construction projects.
Zhengzhou Jinshui Industrial Co., Ltd. has always used high-quality conductor materials, strictly controlled the quality of production, and provided customers with good products. Substandard cable products continue to appear in the market. We hope that customers will carefully check the relevant information of the products when purchasing cable products to ensure that the cable products can be used safely.
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Control cables are used in control system circuits. Depending on the location where they are used, the cable materials and models vary.
Overhead cables are composed of two or two groups of transmission lines, and transmission lines are what we call cables.
The number of cable cores is selected based on comprehensive consideration of multiple factors to ensure the rational use of the cable.
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