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Thread: Fuse question

  1. #14
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    Quote Originally Posted by chill67 View Post
    Suppose you find one blown fuse in 3 phase disconnect, repair problem that caused fuse to blow. I have always just replaced the fuse that was blown. Coworker said all three need to be replaced because remaining fuses that did not blow were strained. Never heard such a thing before, but I learn something every day. Any thoughts??
    I've heard this, but never found it to be true. I used to change all three, but wound up with a large box of "strained" fuses....
    Technical incompetence is NOT a sales tool....

  2. #15
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    Quote Originally Posted by John Markl View Post
    I've heard this, but never found it to be true. I used to change all three, but wound up with a large box of "strained" fuses....
    must be pretty hard to find 3 fuses working on girly residential units, how long it took you to fill the box?10-15 years?

  3. #16
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    Quote Originally Posted by valdelocc View Post
    must be pretty hard to find 3 fuses working on girly residential units, how long it took you to fill the box?10-15 years?
    Whatever, dude....
    Technical incompetence is NOT a sales tool....

  4. #17
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    Quote Originally Posted by John Markl View Post
    Whatever, dude....
    seriously, do they use fuses in residential? besides the little 3 amps? could you post a picture of the "box of strained fuses"?

  5. #18
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    Quote Originally Posted by valdelocc View Post
    seriously, do they use fuses in residential? besides the little 3 amps? could you post a picture of the "box of strained fuses"?
    Seriously? You think all I work on is 5 ton, single phase and less?

    You see, I'm not union....so I can work on whatever my customers want....
    Technical incompetence is NOT a sales tool....

  6. #19
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    Quote Originally Posted by John Markl View Post
    Seriously? You think all I work on is 5 ton, single phase and less?

    You see, I'm not union....so I can work on whatever my customers want....
    wow! you are non-union!!! I thought you were the first business owner that also holds a union card, what happened with the meatpackers union? bet they got sick of you antics and excomulgated you.

  7. #20
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    Quote Originally Posted by valdelocc View Post
    wow! you are non-union!!! I thought you were the first business owner that also holds a union card, what happened with the meatpackers union? bet they got sick of you antics and excomulgated you.
    Nope, I realized that unions are a dead-end street for guys with drive and ambition....and moved on into entrpreneurship.....
    Technical incompetence is NOT a sales tool....

  8. #21
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    Quote Originally Posted by John Markl View Post
    Nope, I realized that unions are a dead-end street for guys with drive and ambition....and moved on into entrpreneurship.....
    you really meant ... moved on into inheritance. right?

  9. #22
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    Take it off site.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  10. #23
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    Smile

    Just to clarify my reason to change all three.

    You really don't have to, but fuses have what's call a melt point before it opens.

    Taking this into consideration, the other two fuses may still show good. As stated, its either good or bad.

    They could have had some "strain" on them and possibly melted a little. Normally that melt point would be instant and the other fuses would show defective.

    Not knowing if the other two fuses were "strained", its good practice to change all of them.
    "My hands are for sale"

  11. #24
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    Quote Originally Posted by valdelocc View Post
    seriously, do they use fuses in residential? besides the little 3 amps? could you post a picture of the "box of strained fuses"?
    You never heard of a fused disconnect?

  12. #25
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    Quote Originally Posted by chill67 View Post
    Suppose you find one blown fuse in 3 phase disconnect, repair problem that caused fuse to blow. I have always just replaced the fuse that was blown. Coworker said all three need to be replaced because remaining fuses that did not blow were strained. Never heard such a thing before, but I learn something every day. Any thoughts??
    If I found a fuse that was straining, I'd give it a little prune juice.

    But, I've never seen a strained fuse....
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  13. #26
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    condenser fan motor,transformer or a CCH might blow just the one fuse,but a running load say a supply fan or compressor...as soon as the first fuse goes it is then single phase and the amperge spike knocks the second fuse.in a pinch if you need a unit running when you lose one fuse,and trip out to get it a 3/4"..5/8" piece of copper works great.you have the other 2 for protection till you get back small stuff maybe do a one for one on the big Trane rooftops style definitly all three get replaced.if the maint guy *****es $$$ let him ok it on the invoice....to go with one
    "when in doubt...jump it out" http://www.youtube.com/watch?v=U1qEZHhJubY

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