Question

why is a plastic covering made over metal wires?​

Answer 1

Answer:

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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.

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Answer 2

Answer:

the most important reason why electrical wires are covered in plastic is to protect people from electrical shock. Electricity is a dangerous form of energy and it can kill. Covering electrical wires in plastic guarantees that the electrons flowing through the wires will not flow through your body when the wire is touched.