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Why feeder cable is cylindrical hollow?

Updated: 8/17/2019
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14y ago

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Since the electrons in a current flow are charged in the same direction, they repel each other. That makes them want to travel on the surface of the conductor. The center of the conductor becomes wasted material, so the preference is to save money and weight, and make it hollow or, for strength enhancement, to make the core out of some other material with a high tensile strength.

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Q: Why feeder cable is cylindrical hollow?
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