I have 12/3 wire running out to my garage. I have a double 20 amp breaker in main box and a subpanel with two single 20 amp breakers in the garage with black to one breaker and red to the other. The black works but the red keeps tripping. What can I do?
Is anything connected to the 'red' side? I am not 100% clear on what is connected to the subpanel but the debugging sequence should be the following: