what are insulated
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Insulated is to protect something with a material that prevents electricity, heat or sound from passing through.
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An insulator is a material or device which restricts the flow of an electrical current. The fact that insulators can interrupt a current means that they are useful as devices that protect people from electricity. Another type of insulator is a thermal insulator, which restricts the flow of heat across an area, rather than the flow of electricity.
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