I have an electrical question about a shed that I have which is always hot. I bought my house 1.5 years ago and there are 3 sheds in the backyard. All of them have power. There is a 240v outlet in one shed that has a breaker in it as well. I've determined that this breaker controls the power to the other 2 sheds. When the breaker is off the main shed still has power but the other 2 don't. I then went to the main circuit breaker for the house and start flipping breakers and checking the line going into the circuit breaker of the main shed. None of them did anything so finally I flipped the main breaker to the whole house and it was still hot! I'm trying to kill power to this shed so I can tear it down but flipping the main breaker to the house didn't do anything. I've asked my uncle who knows about electrical work because he's a maintenance guy at work and he said something about it being tied directly into the main line coming into the house or something. He tried tell me how to locate the source of the power but I didn't understand. How can I determine where the source of the power is coming from? How can I safely disconnect the power so that I can tear down the shed?