How to Find the Fuse Box or Circuit Breaker Box: 12 Steps Apr 15, 2011Turn off the main power in the fuse box. You should see a main power switch in the fuse box that can be toggled between On/Off. Wear gloves and rubber soled shoes when working in the fuse box. Be sure to remove any jewelry before replacing fuses. It is possible to replace fuses without turning the main power off, but it is dangerous.57%(47)Views: 239K Marine Switches and Fuse Panels at Eastern Marine wwwernmarine››Boat Battery and Electrical Supplies3-gang switch panel for installation of a fused marine electrical system. Sturdy, bakelite panel with metal on/off toggle switches. 12 volts D.C. only. Each switch rated at 5 amps. Fuse holders include 1/4" x 1-1/4", 5-amp fuses. Fuses are bridged to a single hot feed connection.