How to distinguish the power line inside the wire is pure copper wire, copper clad aluminum, aluminum wire?
Red copper, copper clad aluminum appearance red white on the inside, aluminum is not to say, must be white.Power line to buy pure copper, to see how much power to buy square lines. A computer with 2 square is enough. The air conditioner will be much larger.It won't change much if you burn it, because the melting point is not enough. To separate is actually very simple, as long as you use pliers to clamp off, you can see the inside of the cross section of the material. Colors represent different metals.
Scratch with toolsTin plated copper wire is yellow and copper when it is scratched. Oxygen free bare copper wire after scratch is still primary color, also copper. The copper clad aluminum wire and copper clad aluminum magnesium is snow white. Or the wire is placed on the cement floor, and the same effect can be achieved by rubbing. Copper clad steel wires can also be identified by this method or by a magnet.
Burning methodJust look after burned with a lighter, burning phenomenon and the combustion results of copper clad aluminum and copper coated aluminum magnesium wire, when the flame contact wire, conductor line will sag, is not easy to burn, burn after the conductor is grey color or more black; because the melting point of aluminum than the low melting point of copper. The difference: copper clad aluminum conductor after burning fingers will twist off, more brittle, will break into a multi section. If the oxygen free copper wire burns to form the ball beads, that is copper wire, copper wire thickness is not the same, after burning the results are not the same, the wire fusion, thick wire as it is.
Because of the thick copper clad aluminum wire using it, it is easy to see. So is the copper clad aluminum cord, there are many small filament strands. But as long as you cut the section and see the pale (aluminum color), you can identify what the material is.
