Common aluminum clad steel strand is used as conductor; The steel core is mainly used to increase the strength, and the aluminum strand is mainly used to transmit electric energy. The cross-sectional area of the conductor varies depending on the voltage. For example, the conductors of 500 kV transmission lines are generally LGJ-400/35 conductors. L is the abbreviation of aluminum wire, G is the abbreviation of steel core, J is the abbreviation of strand, 400 is aluminum 400 mm2, 35 is steel 35 mm2.

Aluminum wire refers to its longitudinal full length, and uniform cross section refers to metal linear materials made of pure aluminum or aluminum alloy. The products are processed along the center and delivered in rolls. Cross section shapes include circle, ellipse, square, rectangle, equilateral triangle, regular polygon, etc. It can be divided into pure aluminum wire and alloy aluminum wire according to material. It can be divided into industrial aluminum wire and process aluminum wire according to its use.