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Thread: Can Screw In Fuses be Safe If Sized Correctly?

  1. #16
    DIY Senior Member molo's Avatar
    Join Date
    Sep 2006
    cold new york


    Quote Originally Posted by DonL View Post
    Was this just a test ?
    DonL, No, this is a subject I've wondered about, and I thought the experts here could help!
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  2. #17
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    If close control of the maximum current in a circuit is required, a fuse will typically protect things quicker than a circuit breaker, and often, be more reliable at that task. But, it is certainly easier to throw the CB back on than to go find the proper fuse should it eventually die. Both fuses AND CB can fail over time from corrosion, or thermal stress, vibration, and other things. So a failed one isn't necessarily an indication of overload. My guess is that a failed CB is more likely to still pass current than a failed fuse, but failure isn't all that common on either.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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