Why is copper wiring coated with insulation?

Answer 1

Because if the wire is "hot", that is, has electricity flowing through it, and you touch a bare wire, then YOU become the "ground" and complete the circuit. This will cause at the least a bad shock, and at the worst it will cause death. The "ground" wires are bare, but that is because they do not have electricity flowing through them unless something shorts out (ie a "hot" wire which is normally black or red in color touches a ground or neutral wire which is normally white. The "ground" wires are either bare or have a green coating.

Answer 2

Copper wiring is coated with insulation to protect against electrical shock and to prevent short circuits. The insulation helps to prevent the flow of electricity to unintended paths and prevents the wire from coming into contact with other conductive materials.

Answer 3

Wire without insulation is only supposed to be used for grounding purposes. It is the same as wire with green insulation. but is easier to connect to multiple outlets as it does not need stripping.

Answer 4

The uninsulated (or green insulated) wire is the safety ground wire.

Answer 5

Copper wire is often used uninsulated for earth wires, and overhead cable are also usually uninsulated although aluminium is more common in those.