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Thread: Capacitors

  1. 10-10-2012, 09:00 PM #1
    Coltpr1
    Coltpr1 is offline Professional Member
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    Question Capacitors

    Starting fall checks and I would like to know at what percentage below the rated MFD you would recomened changing it out to a home owner. Thanks
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  3. 10-10-2012, 09:12 PM #2
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    socotech
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  4. 10-10-2012, 09:13 PM #3
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    Brent Ridley
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    Check the label. Most are + or - .06%. But some are 10%.
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  5. 10-11-2012, 04:08 PM #4
    nsula_country
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    Top of my head, MAX tolerance is 10% Run Cap, 20% Start Cap.

    CT
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  6. 10-13-2012, 10:42 AM #5
    beenthere
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    Quote Originally Posted by Brent Ridley View Post
    Check the label. Most are + or - .06%. But some are 10%.
    Thats the manufacturing tolerance, that it could be off by when its brand new.
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  7. 10-13-2012, 03:53 PM #6
    danielworkerbee
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    We say could / should at 5 or 6 % and needs at 10%.
    Also, inform the client what motor the capacitor is connected to and may damage if too low.
    luck dan
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  8. 10-13-2012, 05:00 PM #7
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    cjpwalker
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    Rule of thumb for the MOTOR's tolerance is 10%. As said before - the +- rating on the capacitor itself if the manufacturing tolerance. A 5mfd +- 6% could be 4.7 right out of the box.
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