A type S fuse is classified as what type of fuse?

A type S fuse is classified as a plug fuse, which is primarily designed for use in residential and small commercial applications. This type of fuse features a base that fits into a socket, and the fuse element can be easily replaced when blown. The plug fuse mechanism is straightforward, allowing for quick maintenance without needing specialized tools.

Plug fuses are commonly used in older electrical panels and provide overcurrent protection by integrating a robust, well-designed mechanism that prevents accidental application of a higher-rated fuse, thereby enhancing safety in electrical systems. This is crucial for protecting appliances and circuits from damage due to overcurrent.

The other types mentioned, such as cartridge fuses and resettable fuses, have different applications and designs, with cartridge fuses being cylindrical and typically contained within a fuse holder, and resettable fuses being designed to automatically reset after an overcurrent condition has been addressed. The functionality and installation method of a type S fuse align specifically with the characteristics of plug fuses.