GFI panel brkr tripping

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Bob that sounds like a good way to go.

I don't see how a resistance chart will be helpful, even if we assume it is 12 AWG copper the resistance per foot is only .001619 ohms.

IMO Not many people have an ohmmeter that has the accuracy needed to figure a distance that will be helpful.
 
I'll change my vote to the KISS method.

Might be worth a quick peek in the BR receptical boxes first though before unhooking stuff. Shoving a gnd towards the back of a box might be all that's required.
 
I cannot see how there is any debate here at all. If the GFCI device is tripping, and the device itself is not the problem, installing a standard CB is not the answer... that (in my opinon) is very unprofessional. Find the problem and resolve it. Jeez, we are professionals, and who ever said our days have to be easy.

I have torn up walls and floors trying to find problems like this. The customer goes crazy... until you find the problem.
 
I agree that replacing the GFI brkr with a non-GFI breaker is not the solution.

Using the GFI as a tester as I dissaseble this circuit is a good approach but I am betting that I'll pretty much have to open just about all of the boxes anyway.

This circuit has 2 baths on different floors (lights and exhaust fans in both), 2 receptacles in a corner bedroom, hallway lights and kitchen lights.

IF there is a neutral to gnd short, wouldn't a circuit tracer pin-point the location for me?
User the circuit tracer:
1) remove grnd + return in panel.
2) Hook up circuit tracer to the grnd + neutral and trace away...?
 
I'll take a stab at this since similar mysterious GFI trip happend at my own place. It was one of the vent fan motors sending enough current down the neutral milliseconds after the hot was switched off. The fan was still spinning just when the GFI tripped. The fan was on a GFI since it was over a shower area.

Anyway, try disconnecting the fan and see if the trip goes away.....
 
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