Originally Posted By: jmyers This post was automatically imported from our archived forum.
Jay,
Now it will go even slower since only half will post here and the other half will post there! 
Originally Posted By: rmoore This post was automatically imported from our archived forum.
(also posted in the MO section)
What I'm seeing when I blow the photo up is that the four discolored grounding conductors all cross very close to the "hot" feeder on the right. On at least three of them, the discoloration is at its worst right at the point they cross that feeder. Grounds that cross the left feeder are not discolored.
I don't know what caused it but I would suspect the right feeder is somehow the culprit. Perhaps "leakage" from bad insulation or a once overloaded and hot feeder. Interestingly there is one ground that also crosses the right feeder that is not discolored. That one is "Romex" and may have been added after the event?
Jay...doubtful we are going to "solve" this one here. Too many possible options. Might even have been a surge from a lightning strike on one leg.(?) I think you've done all you can...report and call for a Sparky. He needs to sort out the comingled grounds and neutrals anyway as you said (in the MO thread) this is a subpanel.
-- Richard Moore
Rest Assured Inspection Services
Seattle, WA
www.rainspect.com
