Aluminum or Tin coated copper

[Mitch A. Harris]

Please take a look and give me your opinion are these wires Aluminum or Tin coated Copper. Home is 100 years old, no idea when the electrical was done. At first I thought Aluminum but now I'm questioning myself.

[mnahrgang]

Tinned Copper would be my first and best guess. The cloth covering is an indicator. Solid aluminum (late 60's early 70's) had plastic insulation.

[Robert Meier]

I agree with Mark, tin coated copper. The old rubber/cloth covered conductors are the best indicator.

[Mitch A. Harris]

Thanks Guy's

[Larry D. Kage]

Don't forget the overfused wires...