As everyone else here has experienced, I've had my share of "Bad Breakers" which were simply in the tripped off position.
Also had the "Bad Breakers" which were tripping due to some fault.

But, have replaced a few truly "Bad Breakers" - due to the reset mechanism being worn completely out. One common type is the old Square D XO frames.

Had lots of "Bad Breaker" scenarios where the Line side Bus connection was barbequed. More common with frames on a Plug-In Bus, but had a few Bolt-On Bus problems from loose screws on the Bus.

Bad Breaker!!! Your Grounded for two weeks!!! [Linked Image] <bad humor>

Scott S.E.T.

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!