Fuses in plugs are made in standard ratings. The most common are 3 A, 5 A and 13 A. The fuse should be rated at a slightly higher current than the device needs: if the device works at 3 A ...

A plug connects a device to the mains electricity ... flow from the case of the device to the ground if there is a fault A fuse provides a built-in fail-safe to the electrical circuit for a ...