The idea is any earth connection you have for lightning protection should
have greater area than the conductor bonding any other grounds. The idea
on tower grounds is to bond each leg to crowfoot grounds going out to
envelope a larger area of earth the leg of the tower would alone, thus
spreading and dissipating the lightning charge into the surrounding earth.
If instead, it is traveling along a conductor and finding a better ground in
your house, there is something wrong with your grounding system for the
tower or mast.
-K5KVH
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