I have an old style screw in fuse panel 100 amp copper wires. One our last electical bill showed enormous amount of electricity used. We finally isolated it to one fuse in the panel. It uses about 50 kwh per day when the fuse is in and 0 kwh when taken out. (We traked it online). We followed all the line and unplugged evey plug and turned off every light and still uses 50 kwh per day. This line also goes underground to the garage for one light and receptacle. Any ideas what could be drawing so much power. At first we thought someone was stealing power but there is no evidence of that outside. We called an electrician who spent over an hour checking and confirmed it, but has no idea what it can be on the line.