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Electrical breaker to sub panel keeps tripping?
I have a 30 amp breaker in my home panel that runs to a sub panel in my garage. The breaker in the main panel keeps tripping. I have tried to reset both the main and the garage breakers many times, but no luck. The sub panel has a 30 amp breaker, then 2 - 20 amp breakers for lights and switches. I have disconnected everything in the garage plugged into a plug, in case something was causing it to trip.
No luck. The home was built in 2005, and I have never had an issue until this winter. I have even replaced the 30 amp breaker in the main panel in case it was bad. No luck. Any suggestions on what I could try next?
3 Answers
- Mr.357Lv 75 years ago
You don't need to unplug anything. Turn the two 20 amp breakers off. Turn on the 30 amp breaker. If it trips, there is a short in the wiring between the 30 amp breaker and the sub panel or the sub panel is bad. If it stays on, turn on the 20 amp breakers one at a time. If it trips, when you flip a breaker, there is a short in that branch if there is nothing plugged into the receptacles.
- KMALv 65 years ago
Try (if you haven't already done so) turning off both 20 amp breakers and see what effect that has.
If that seems to take care of it then turn them on one at time.
I'm inclined to think you have an outside light or receptacle that is wet and current is bleeding to ground..
If the problem still persists then either there is a bad spot in the insulation on the feeder wires or something else is tapped off the circuit.
(You say you replaced the 30 amp breaker, so nothing is doubled up there.)
Source(s): electrician - XTXLv 75 years ago
you have a short in the wiring and you probably need to run new wires [[romex or cable]] from the home panel to the sub-panel in the garage ===by turning off all power in the garage you have proved that it is the faulty wiring ...... Until you get the wires swapped out I strongly suggest that you do not leave that breaker on while you are away from the home...
