The insulation on a wire is applied after the wire is drawn to size.
The primary element in a copper wire is copper itself, which can range from 99.9% to 99.999% pure. Copper wires are often also alloyed with other elements such as tin or silver to improve their properties like strength and conductivity. Insulation materials like PVC or nylon are also used around the copper wire to protect and insulate it.
A wire has to be made of a conducting metal such as copper or aluminium, and it has to be thick enough to carry the required amount of electric current. Wire is often given an enamel coating to insulate it Wires are often stranded which gives flexibility.
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how much copper is in copper wire
No. Copper wire is a solid
No.. Copper wire isn't
No, copper wire is not magnetic.
Copper wire sent for recycling is remelted and rerefined. It becomes a new copper product one of which might be new copper wire.
If you mean a bare copper wire, that is the "ground" wire.
Yes, if it is not an insulated wire. If it is bare copper it is always ground. But the hot and neutral wire are also copper, they are just insulated.
Copper is often used as a material for the wire itself, but I don't think you would ever use a metal to insulate a wire. Metals all conduct electricity, meaning using them as insulators for anything electrical would be a very bad idea. The most common material used to insulate electrical wires is PVC (polyvinyl chloride).
To refine copper wire scrap, you need professional tools and equipment such as copper stripper which is used for removing insulation from copper wire.