Stop trying to steal copper wire.
Copper wiring can turn black due to oxidation, which occurs when the copper comes into contact with air and moisture. This chemical reaction forms a layer of copper oxide on the surface of the wire, giving it a black appearance. It is a natural process and does not affect the conductivity or performance of the wiring.
If you are asking can you connect aluminum wiring to copper wiring, the answer is yes. With one provision. You must cover the connection with a special compound prior to putting on the wire nuts. This compound is available at Lowe's and Home Depot and Ace.
Most electrical wiring is made of copper due to its high conductivity and flexibility. Copper is preferred for electrical wiring as it can efficiently carry electricity while being durable and resistant to corrosion. However, there are also some electrical wiring products made from aluminum, which is a less expensive alternative with slightly different properties.
For most applications ... where the wire has no function other than to join the components that accomplish the purpose of the circuit ... the best metal to use for wiring would be the one with the smallest resistivity. That would be silver. A big part of the reason that we usually settle for copper is because it is only second best as a conductor and is a lot less expensive than silver.
Too expensive, it would be stolen (as it is there are people stealing copper electrical wiring, and copper is much cheaper than gold).
Most do have copper in the wiring.
Copper is almost always used in car wiring.
Copper is commonly used in electric wiring and pennies due to its excellent conductivity.
Copper is used for wiring!
For wiring, we only use copper and silver. The most common conductor is copper. Almost all wires use copper as a conductor.
Most of the wiring is copper, not much else.
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Copper piping and wiring and not interchangable.
Copper is the element used in wiring and pennies due to its high electrical conductivity and corrosion resistance.
wiring is made of copper because, it is a superconductor and super heat resistant. It also loss negligable amount of enegy.
Copper is more commonly used in electrical wiring than iron.