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Why do conductors have a limited requirement for insulation?

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Dry air is a good insulator, or dielectric , so that conductors used for electric-power transmission require insulating material only at their points of contact with the supporting steel structures.

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Get more facts and information about insulation . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

Similar questions: For what reason is a conductor limited in its need for insulation? What prevents a conductor from requiring a lot of insulation? [ Hide these questions ]

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