Is it possible to find really damaged wires in this tester?


Joined Jun 4, 2014
I have a tester similar to the one shown and that can detect live wires by being near the wire, no contact needed. It will also test fuses or wires for continuity.


Joined Aug 7, 2008
I do not think a non-contact meter will detect a fault in a wire if wire still has continuity.
Also no not think much of the YouTube AC Line Detector. Parts may be something like
MPSA13 darlington , 2N3904, couple of resistors, & LED.
I use a high gain audio amp. ( Radio Shack ) with speaker for non contact location of dead Christmas tree lights.
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Joined Aug 21, 2008
If you really need to use button cells, either use a cell holder or be very quick with the soldering iron. I had one explode when soldering to it.

Audioguru again

Joined Oct 21, 2019
The extremely simple circuit does not detect a damaged insulation part of a high voltage AC wire. It simply detects that a wire has some high voltage AC in it if it is insulated or not.