"John Rumm" wrote in message
...
... I could not get a voltage reading between the newly plastered wall and
a water pipe - even on a very high impedance DMM. Needless to say the wall
had dried out a fair bit by the time I was looking at it....
I wonder whether you would have got a different result if you had dug down
to the expanded metal mesh and tested that?
Colin Bignell
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