On Mon, 05 Nov 2007 17:35:25 -0800, Frank B Denman
wrote:

If I'm willing to pull the cover off the breaker panel and probe
individual wires, am I likely to have greater success? The CS-500A that
I've got doesn't seem to get any luckier when it has access to
individual wires......

Frank

snip

It helps a little..sometimes. If you've got a nice clean panel where
the wires aren't all a rat's nest it can help quite a bit. But those
are usually the panels that are well labeled to start with....

Paul F.