THESE BUSWAY POWER TAKE-OFF DEVICES ACCEPT EDISON 70-100 AMP TYPE ECNR RK5 250V TIME DELAY CARTRIDGE FUSES. THESE FUSES PROVIDE OVER-CURRENT PROTECTION AND 200,000A SHORT CIRCUIT PROTECTION. TO MAKE YOUR FUSE SELECTION PLEASE SEE THE "FUSES & ACCESSORIES" SECTION OF THIS WEBSITE.