This is where the 220 volts at 100 amps comes into the Tesla Coil area. I have one electrical disconnect box for each side of the 220 volt line. In the background you can see the 100 amp breaker protected box for the 220 volts that comes into the building. Each box has 2 - 35 amp slow blow fuses that together can handle 75 amps per side of the 220 volt line. The boxes are connected together by a wooden handle so that both are turned on and off at the same time. The only reason I went with this design is cost, I got these 2 boxes and fuses for 1/5 the price of the larger ones that were rated at the current I wanted. When I am not around the Tesla Coil all fuses are removed, breakers are off inside and outside the building. This is to prevent anyone but me getting power to this part of the building. Also with this setup, when I am working on the coil I turn off both sources of power in the building, This is a good step in preventing any chance of forgetting to denergize the system, and preventing visitors from accidentally bumping on the power.