Scary Fuse Boxes | Old House Web A house with 60-amp service, on the other hand, almost always needs upgraded electrical service. And in some (but not many) older houses you'll find a 100 or 150-amp fuse box with a dozen to 20 or more individual circuits, each protected by a 15 or 20 amp fuse. I have a 100 amp fuse panel. It has two pull-out fuse Aug 27, 2016I have a 100 amp fuse panel. It has two pull-out fuse blocks, behind each there are two cartridge fuses. One of these pull-outs is for the oven. Below these are four screw type fuses, and below these is a separate set of 4 screw in fuses and next to this are two sets of two screw-in fuses (these are for the A/C and the dryer).