Copper-clad aluminium wire refers to the wire with aluminium core as the main body and a certain proportion of copper coating on it. It can be used as conductor of coaxial cable and conductor of wire and cable in electrical equipment, such as home audio connection.
Due to the skin effect of high frequency signals, copper clad aluminium wires and copper clad steel wires have the same conductivity as pure copper wires when transmitting high frequency signals (greater than 5Hz).
Unique composite properties: copper clad aluminium wire has both copper conductivity and low aluminium density; copper clad steel wire combines copper conductivity and high strength of steel. Tin-plated copper clad steel wire shows solderability and vulcanization resistance of tin. Silver-plated copper clad steel wire improves electrical conductivity, thermal conductivity, corrosion resistance and oxidation resistance. Therefore, it has a wide range of applications.
Because the main function of this kind of wire is to transmit signals, the current flowing through it is very small. However, because the conductivity of aluminium is only 2/3 of that of copper, the national standard stipulates that all wires and cables used for power transmission need to use non-metallic plated or annealed copper wire as conductor, and the use of aluminium wire (including copper-clad aluminium wire) as conductor is prohibited.