I would love to understand why HV lines don’t carry the voltage required to break the resistance to earth in very heavy rain. Is rain water pure water with low conductivity? Or are the air gaps too much for the voltage?
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As other’s have said it even if water were a good conductor it would need to essentially be a solid mass to have good conductivity.
That said, the insulators on the towers are also designed such that the water is shed away from contact with the tower and wire–they look like stacked umbrellas.
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