I have noticed while changing fuses in my home's fuse panel that some fuse %26quot;holes%26quot; have a blue plastic disc in them. What are they for? Why doesn't every fuse have one?
Fuse panel - blue plastic disc?
I believe that may be only on fuse adapters that tell you to use only that color coded fusetron type fuses.
Are the threaded hole seem smaller on the ones blue as to the others with no disc?
