Ceramic Fuse Black Line

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Ceramic fuse black line.

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. It s easy to tell if a glass fuse is blown. Although it is fairly easy for a practiced eye to identify car fuses on sight you can also look at a visual guide to help determine which type of fuse you need to. The presence of a ceramic fuse ensures that an electrical surge is unable to harm the inner components of the microwave.

What does this mean. So i took it apart and saw that the fuse had a black line going around the fuse. 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. It will show scorch marks and the filament will be melted.

So i bought fuses and replaced the old one. Testing a ceramic fuse is the only way to tell if the fuse has blown. Product title 14qbp20csb microwave ceramic slow blow fuse 20 amp. It worked fine until i open the microwave door it blows every fuse i put in it.

To check a ceramic fuse use an ohmmeter or continuity tester. The fuse will be one to two inches long. Are they just made like that.