Breakers look like

I did an inspection and the panel looked good, however at closer look the breakers appear to have plastic or ceramic near the terminal screw that was breaking down. I checked the box for over heating and nothing. Almost all the breakers had some sort of damage here. I never seen this before. Anyone know what this is or the cause.


Nothing to be concerned about. Factory sealed screw.


Bill’s got a handle on it, as usual… :smile:

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Yep, as Bill says. Also, sometimes when the electrician is tightening the screw, he either is using too wide of a screwdriver or does not have it seated properly and it scraps the white seal leaving dust.


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