Preventive Maintenance of Fuses

Preventive maintenance of fuses consists of checking for the following conditions and correcting any discrepancies.

1. IMPROPER FUSE. Check the fuse installed against that recommended in the technical manual for the equipment. If an incorrect fuse is installed, replace it with the correct fuse.
2. CORROSION. Check for corrosion on the fuseholder terminals or the fuse itself. If corrosion is present, remove it with fine sandpaper.
3. IMPROPER FIT. Check for contact between the fuse and fuseholder. If a piece of paper will fit between the fuse and the clips on a clip-type fuseholder, there is improper contact. If the fuse is not held in the cap of a plug-type fuseholder, the contacts are too loose.
4. OPEN FUSES. Check fuses for opens. If any fuse is open, repair the trouble that caused the open fuse and replace the fuse.