Under the same mass and diameter, the length ratio of copper clad aluminum wire to pure copper wire is 2.45:1~ 2.68:1, this greatly reduces the cost of cable production; Copper clad aluminum wire is more malleable than pure copper wire, and does not produce insulating oxides like aluminum, so it is easier to process; Copper clad aluminum wire is light in quality, easy to transport, Installation and construction. It must be pointed out that because the mechanical properties of copper clad aluminum wire and pure copper wire are not exactly the same, it should be paid attention to in the project construction and accumulate the experience of using continuously.