Today, I melted some metals for the first time, including some aluminum cans and aluminum parts from my drying machine. I was thrilled to create ingots from them. However, when I tried to make a copper ingot from wires taken from an electric motor, I realized that the resulting ingot was pure aluminum! I was puzzled and investigated the wires more closely. It appears that the core of the wire is grey, while the outside looks like copper. The color on the outside is identical to that of a normal copper wire. The electric motor is from a 'Whirlpool Duet Sport' dryer. I'm wondering if it's a new industry practice to make aluminum wire look like copper, and if it's illegal to do so.
All wires used to wind coils for motors must be insulated so adjacent loops of wire do not short-circuit themselves. For some reason the most common form of wire insulation enamel is orange/red in color (this has been true for over 50 years), which coincidentally gives it the appearance of copper wire.
That said, I had no idea that anyone was using aluminum wire for motor windings. Every motor I have ever taken apart used enameled copper wire.