Question

Why is an electric wire usually covered with plastic or rubber​

Answer 1

Explanation:

Most electrical wire is covered in a rubber or plastic coating called insulation. ... The purpose of insulation covering the metal part of an electrical wire is to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors.

Answer 2

Answer:

Electric wire has rubber or plastic coating on it because the copper inside the wire conducts electricity, plastic doesn't conduct electricity so it prevents shocks caused by copper.