Electrical wires<>are covered<>with plastic or rubber<>to insulate the electrical wire<>usually
This is why the electrical cords that connect your TV and other appliances to the electrical receptacles in the wall are generally made of copper wire covered with rubber or plastic.
Electrical wires are usually covered with plastic or rubber to insulate the electrical wire.
Which of the following best explains why electrical wires are usually covered with plastic or rubber?