Dual AFCI/GFCI breaker trip randomly

Question

I have 3 dual AFCI/GFCI breakers in my panel and they are tripping randomly.

For example, i’ll turn the breakers on and all will be well. Then 2 days later they’ll trip. Or 12 hours later. Or a week later! It’s always different, best it’s usually within 2 days.

This last time, ALL THREE of the dual breakers flipped.

Any ideas what could be going on here? None of the circuits are under any real stress or overload. They each have some lights and outlets, and that’s about it.

Answer 1

A very common reason for "random" AFCI/GFCI breaker tripping is the connection of neutral ("white") wires from different circuits at some point beyond the breaker panel. E.g., some unknowledgeable person has mistakenly connected together all the white wires in some switch box somewhere. Detection of this problem would require de-energizing the breaker panel, disconnecting all the neutral wires, and checking for cross-connections with an ohmmeter or some such. And then hunting down the physical location(s) of such cross-connections.