The machine breaks out on the air line, how to find the cause?

Nikolai asks:
In s / o on one street, an automatic machine knocks out. How to determine where from which pillar to the KZ house?
The answer to the question:
There are several options - by sequentially disconnecting the wires and ringing the remaining line, visual inspection of the line, you can apply voltage through an autotransformer, where the short circuit will burn off.

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