> Copper is used for heavy-gauge electrical wire. For many of these applications, aluminum is much less expensive and arguable superior (it’s lighter and more f

> Copper is used for heavy-gauge electrical wire. For many of these applications, aluminum is much less expensive and arguable superior (it’s lighter and more flexible). Superior in what way? Being lighter / more flexible? Did you account for the fact you have to upsize aluminum to carry the same amperage load as copper? When comparing Apples to Apples (Err.. Aluminum to Copper) on say a 200A service entrance cable, the difference in weight / flexibility isn’t much based on personal experience, but there are other negatives to using aluminum over copper for SER cable. One example, voltage drop over 50ft isn’t as much an issue with copper.