Understanding An Old School Fuse Box - YouTube Click to view on Bing6:57Nov 07, 2016Here'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: 171K I need help understanding an old fuse box - Houzz 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." The outter two are clear. Abbove this row of 4 fuses are two carriages side by side. The one on the left says "..