Cartridge-type fuses, that have a long cylinder shape, are still approved, and useful when a delayed trip is desired. Screw-in type fuses-the round ones with a clear window in the center so you can tell when they are blown-are the only kind that are problematic. Overloaded wiring can get hot enough to start a fire. The base into which the screw-in fuses are inserted will accept any amperage rating in many panels, making it possible to over-fuse wiring rated for 15-amps with a 30-amp fuse when a homeowner is frustrated with repeatedly blowing the fuse on a circuit.The panel is outdated equipment and at the end of its serviceable life. The serviceable lifespan of a fuse panel is rated at about 50 years.There are two reasons why insurance companies will not accept a home with a fuse panel:
If the inspector checks the box for fuses-even for a subpanel-you will be declined insurance until the panel is replaced. One of the four points is the electrical system, and the 4-point form asks whether the electrical panel has fuses or circuit breakers. Some require them for homes that are even younger. Insurance companies that write homeowner’s insurance want to get a 4-point inspection report for homes that are more than 50 years old. Fuse panels were replaced by circuit breakers for new home construction in the mid-1950s, which makes any fuse panel still in place at least 60 years old.
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