What is the difference between copper clad aluminum wire and pure copper wire?

I. What are the differences between copper clad aluminum wire and pure copper wire?1, mechanical properties of pure copper conductor strength, elongation than copper clad aluminum conductor, that is to say, pure copper is better than copper clad aluminum in mechanical properties. Copper clad aluminum conductor is much lighter than pure copper, so the copper clad aluminum cable is lighter than pure copper conductor cable in the overall weight, which will bring convenience to the cable transportation and cable erection construction. In addition, copper-clad aluminum is a little softer than pure copper, with copper-clad aluminum conductor production of cables in the softness of the cable is better than pure copper cable. 2, electrical properties because of the conductivity of aluminum is worse than copper, so that the copper-clad aluminum conductor DC resistance is larger than the pure copper conductor. When the frequency exceeds 5MHz, the AC resistance attenuation at this time in these two different conductors under no significant difference. At 5 MHz, the current flows in a thickness of about 0.025 mm near the surface, whereas the copper layer of a copper-clad aluminum conductor is about twice as thick. In the case of coaxial cables, since the signals are transmitted above 5 MHz, the copper-clad aluminum conductor transmits the same as a pure copper conductor. To a certain extent, it can be said that the use of copper-clad aluminum cable than the use of pure copper conductor cable return loss index is good. 3, the economy of copper-clad aluminum conductor price than the same weight of pure copper conductor is a little more expensive. But the same weight of copper-clad aluminum than pure copper conductor length is much longer, and the cable is calculated by length. For the same weight, copper-clad aluminum wire is 2.5 times longer than copper wire, and the price is just a few hundred dollars more per ton. Combined, copper-clad aluminum has the advantage. As the copper-clad aluminum cable is lighter, the cable transportation costs, installation and erection costs will be reduced, will bring a certain degree of convenience to the construction. 4, easy to maintain the use of copper-clad aluminum can reduce network failures, to avoid network personnel in the maintenance of the "winter son of the core, summer son of the cut skin" (aluminum tape longitudinal package or aluminum tube products). As the cable's copper conductor and aluminum conductor thermal expansion coefficient difference is large, in the hot summer, aluminum conductor stretch larger, copper conductor relative retraction, can not be fully contact with the elastic contacts in the F head; in the cold winter, aluminum conductor shrinkage is larger, so that the shielding layer falls off. When the coaxial cable using copper-clad aluminum inner conductor, it and the aluminum outer conductor of the thermal expansion coefficient of the difference is small, the temperature change, the cable core failure is greatly reduced, improving the transmission quality of the network.

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