Copper is used for wiring!
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.
Copper is the most commonly used conductor material in wiring, steel is also used but is much firmer and harder to bend.
The most commonly used wiring method for residential use is called nonmetallic sheathed cable. Other types of wiring methods are knob and tube, as well as service entrance cable.
Copper
aluminum
copper
mercury
The most common metal is uaually iron for gates
the first commonly metal used was wood
There are a few commonly used welding process. The top used are shielded metal and arc welding.
Gold is generally the most commonly used metal to set diamonds in.
Copper is the main metal used in wiring.