A Guide to Screw-In Fuses and How They Work Fuses for standard circuits (not high-voltage appliance circuits) are called plug fuses and have screw-in bases. There are two different types of bases and screw-in fuses: the Edison base (found on Type T fuses) and the rejection base (found on Type S fuses). The Edison base (Type T) looks like a light bulb base and fits the standard sockets found in old fuse boxes.Author: Bob Formisano Understanding An Old School Fuse Box - YouTube Click to view on Bing6:57Here's a quick review of how to use a fuse box (with the screw-in fuses) safely and some discussion about what to look out for in an old house.Author: enduringcharmViews: 222K Do I need to update the fusebox in my house? - MyBuilder Do i need to update the fusebox in my house? I'm buying a house which has an old fuse box. This was noted on the survey I had done and it was suggested I update it. Is this really necessary? There's nothing actually wrong with the fuse box - it's just old fashioned? 4 Outdated and Unsafe Electrical Panels That Could be 4 Outdated and Unsafe Electrical Panels That Could be Hiding in Your Home. Fuse box. Fuse boxes are old electrical panels that use fuses instead of circuit breakers to (except they can’t be reset and must be replaced.) However, most fuse boxes in homes today are unsafe because they’ve been modified to try to serve today’s Scary Fuse Boxes | Old House Web When a 15-amp fuse blows, it can be mighty tempting to screw in a 20-amp fuse as a replacement instead of hiring an electrician to wire a new circuit. And when that 20-amp fuse blows, it can be equally tempting to screw in a 30-amp fuse. Having done so, you've created a fire hazard. So to I need help understanding an old fuse box - Houzz I need help understanding an old fuse box. jspears. September 10, 2006. I have an old fuse box that blew a fuse and I am not sure how to replace it. It has a row of 4 edison screw type fuses. The middle 2 are red and say "time delay fuse 20Amp." OLD BOXES STORAGE HELP !!!