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Thread: How old are these fuses?

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  1. #1
    DIY Member Phillbo's Avatar
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    Default How old are these fuses?

    If you were to guess, How old would you say these fuse's are?

    Not even sure what the one on the right is .... Should these be in a 5 ton heat pump rated for 50amp? They are 45amp.
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  2. #2
    Plumber jimbo's Avatar
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    Well, I don't think you see Gould fuses any more. I could be wrong, but I think FerrazShawmut bought up that brand.

    Anyway, 45 amps could be in the ballpark for a 5 ton condenser.

  3. #3
    DIY Member Phillbo's Avatar
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    So, probably more than 1 year old.
    Last edited by Phillbo; 07-15-2009 at 12:34 PM.

  4. #4
    Homeowner Thatguy's Avatar
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    Quote Originally Posted by Phillbo View Post
    Should these be in a 5 ton heat pump rated for 50amp? They are 45amp.
    I got 24A for a 5 ton heat pump with COP = 3 at 240v. Start up current may be 6x higher.

    Wrap the fuse in several layers of newspaper and hit it with a hammer. If the fuse element inside is only cracked in one place it was a fatigue failure or a mild overload. If the element is splattered it was a heavy overload.
    Last edited by Thatguy; 07-14-2009 at 06:22 PM.

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