Whats happening if overvoltages are transmitted from the service entrance box via the grounding connection?
Overvoltages on the earth conductor are unusual and may be reduced to a minimum level by the protection of the plant delivering electric energy. The devices which are provided with a protective-earth pin normally show a protective insulation i.e. are assigned to an earth potential of several 1000 V. Overvoltages below this value, which are measured on the earth conductor, will not influence strongly the operation of those devices.
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- Whats happening if overvoltages are transmitted from the service entrance box via the grounding connection?
