I have a 30 amp circiuit running to a high power outlet in my dining
room. I discovered if I flip one of the the 15 amp breakers on the
circuit in the breaker box, the power to the basement lights shuts
off.. How did they run at 15 amp line from the 30 amp circuit? there
is a junction box in the basement cieling with a line going to the
basement lights right were the 30 amp line runs up to the dining room.