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). Explore Further Buss Fusesbussfusessafety - Cooper Bussmann's screw-in Edison-base minielectronicskexchangeUnderstanding An Old School Fuse Box - YouTubewwwubeFuse and Types of Fuses - Construction, OperationwwwtricaltechnologyFuses - Power Distribution - The Home DepotwwwdepotRecommended to you based on your activity and what's popular • FeedbackThe four screw-in fuses are for branch circuits. If only a few of your lights or receptacles don't work, it's probably because one of those fuses is open (blown). YOu can usually tell which is bad because it will have a blackened face, or (for the time delay type) the spring inside will be short rather than stretched out. Related searches for screw type fuse box screw in fuse typesscrew in fuse box diagramscrew in type fuse holdersold screw in fusesscrew in glass fusesscrew in fuse panelscrew in fuse adapter20 amp screw in fuse