Question

what is a post office box in electricity

Answer 1

A post office box is a practical form of wheat stone bridge. It is a testing device used to locate faults which may be miles away. It was used by the engineers in UK to determine where a break occurred in the cable.

Answer 2

A post office box is a practical form of wheatstone bridge. It is a testing device used to locate faults which may be miles away. It was used by the engineers in UK to determine where a break occurred in the cable

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