This is a basic common sense in the electrical industry. The materials of copper wire and aluminum wire are different and the chemical properties are different. Because copper and aluminum have different hardness, tensile strength, current carrying capacity, etc., if copper and aluminum wires are directly connected together,

1. There may be a risk of disconnection due to insufficient tensile strength, especially if overhead lines are used.

2. Long-term energization will cause chemical reactions, oxidation of copper-aluminum joints, increase of resistance at copper-aluminum joints, and heat, which may cause safety accidents such as fires in severe cases.

3. The current carrying capacity is different. The same wire diameter copper wire is 2 to 3 times that of the aluminum wire. The copper-aluminum wire may directly affect the current-carrying capacity of the line. So how to connect copper wire and aluminum wire to be safe and reliable?

Usually, copper-aluminum transition joints are widely used in line erection. This copper-aluminum tubular transition joint is mostly suitable for small-diameter line erection.