A few questions for the more experienced electrician/inspector. Basically I just want to know whatever I can about this wire, its sheathing, rating, etc. In the attached photo, the 3rd and 4th wires down appeared to be aluminum. However the 4th one (with red covering) has a few nicks on it that are copper in color. Why are the nicks that color? It makes me think it is copper on the insideâ⬦? The house was built around 1930, the panel was rated at 100AMP, and the main breaker was 70 amps. Thanks for the help. Download Attachment: Wire.JPG 84.88 KB