pfm wrote in message
...
Many advocate the use of an isolating transformer. The oscilloscope
probe and ground are then used like multimeter leads. Tektronix and
others maintain this is a dangerous practice and may result in
cumulative damage to the oscilloscope. Differential probes are one
answer, though quite expensive.

Comments please. Thanks

BobH

Damage maybe if some voltage rating of a cap or something is exceeded but
"cumulative " damage, to what?