"raden" wrote in message
...
In message , Clive Mitchell
writes
In message , "Dave Plowman (News)"
writes
With standard unbalanced connections, removing the mains earths from
everything but one is usually the best way to go. Of course I can't
recommend it on here...

Oh dear. There appear to be people still doing it.

So you have equipment with floating mains earths and you have earthed
equipment. A fault occurs, someone bridges the two pieces of equipment
and gets killed.

You NEVER disconnect the mains earth from equipment.

Well, actually ....

sometimes you do

on a scope - might be naughty, but sometimes necessary

Its only necessary for those that don't want to fix the problem in the
correct way.
screened TP cable is a good way to get earth problems especially when its
100+m and terminated in different buildings.
once you understand how to deal with that audio stuff over a couple of
meters is easy.
Just keep a soldering iron and some ceramic caps handy.