I’m still a fairly new inspector, so apologize for the question: I’ve encountered a few electric panels that have a rust-colored powdery residue on the plastic portion of the breakers. It is easily cleaned off. Not sure if the cause is moisture, heat or something else. Please help.
Posting a picture is helpful for others to understand more fully…
Where are you from/ Not that it matters with whats going on but it might help explain somethings.
Electrical arching creates a brown power stain. A picture is in order here.
What did you report on the other panels that had the issue?