Originally Posted By: Greg Fretwell
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Dan, I doubt taking a breaker to an electrician is much of a test. There really isn’t much on a breaker to “age” it other than some minor style changes. That still may not indicate when it was installed. These things can sit around for years.
There should be a permit on file for any service upgrade or panel swap. The lack of a permit may be more significant than the age of the parts.
Of course some building departments are better than others about maintaining their paperworek but if you regularly work in that area you will soon find out if you look at public records on every inspection.