Older transmission lines are made from copper cable. What advantages does copper have compared with aluminum? Why is aluminum used to make transmission lines today?

1 Answer
May 2, 2017

Answer:

The thermal and electrical properties of copper are both superior to aluminum. It was also easier (cheaper) to obtain. Aluminum is lighter.

Explanation:

The thermal and electrical properties of copper are both superior to aluminum. It was also easier (cheaper) to obtain.

Aluminum's better weight (lighter) and firmness make it structurally better for long-distance transmission lines.