I am almost ashamed to ask this considering the field I work in, which is industrial electronics. I am not a licensed electrical but a troubleshooter.
Heck, I go behind the electricians and find their mistakes, but this is a stumper and LOML is really getting irritated with it.
Our home is about 2 1/2 years old and this problem has been there ever since it was newly built and I can't find it.
There a 20 amp breaker that feeds three outlets in the kitchen. Of those outlets, one is almost never used and one has the coffee pot plugged into it and the other the microwave (that one is a ground fault).
About every fifth time you hit start on the microwave it will trip the 20 amp breaker (not the ground fault).
The breaker panel is out in the garage, so you have to go out to the garage and reset it.
I have changed the breaker out, the ground fault receptacle and even replaced the microwave and it is still tripping.
There is a different sound from the microwave when it trips, almost like a bump! or surge.
You guys have never let me down, tell me what is wrong with this circuit.
Oh, one other thing. I have tried unpluging the coffee pot to see if that that any effect, you know, both on at once. NOT!