This is exactly why I installed a 50 amp breaker in my panel and im running the wires tonight after work. This is pretty much the only way to continue to mine bitcoin at today's levels. 15 amp breakers on your normal outlets is a huge fire risk on anything over 2000 watts. It's not only the miners that is the problem its overloading the wires in your wall wich can catch the whole house on fire...  Also you can run your power supplies at 240 volts wich is more efficient and will produce less heat ...