I have a 40 amp breaker on my main service panel which feeds a pony box in the attic of my house. Two recepticles that are used for a window air conditioner are tripping the 40 amp breaker at the main panel. Other recepticles in the attic do not trip the breaker. All of the 10 amp breakers in the pony box do not trip. Why is the 40 amp breaker tripping before the 10 amp breaker in the pony box, and why with just two recepticles in the room?
Thanks