Ceramic Fuse Black Line

It s easy to tell if a glass fuse is blown.

Ceramic fuse black line.

So i bought fuses and replaced the old one. A homeowner can determine if a glass fuse in blown by performing a visual inspection and looking for a break in the thin wire and a brown discoloration in the center of the fuse. 4 5 out of 5 stars based on 2 reviews 2 ratings current price 5 43 5. To check a ceramic fuse use an ohmmeter or continuity tester.

It will show scorch marks and the filament will be melted. What does this mean. Unlike glass fuses those ceramic fuses called current limiting fuses are very fast acting filled with sand that melts into glass shall a fault occur which is an insulator thus opening the electrical circuit. The presence of a ceramic fuse ensures that an electrical surge is unable to harm the inner components of the microwave.

So i took it apart and saw that the fuse had a black line going around the fuse. Are they just made like that. It may be a glass fuse with a filament or a ceramic fuse. The fuse will be one to two inches long.

Testing a ceramic fuse is the only way to tell if the fuse has blown. Blade fuses are sometimes physically difficult to pull out but most vehicles come with a fuse puller tool that is located inside one of the fuse boxes or attached to a fuse box lid. A ceramic fuse however shows no damage upon visual inspection.