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Thread: Capacitors
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10-10-2012, 09:00 PM #1
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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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10-10-2012, 09:12 PM #2
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10%
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10-10-2012, 09:13 PM #3
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Check the label. Most are + or - .06%. But some are 10%.
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10-11-2012, 04:08 PM #4
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Top of my head, MAX tolerance is 10% Run Cap, 20% Start Cap.
CT
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10-13-2012, 10:42 AM #5
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Thats the manufacturing tolerance, that it could be off by when its brand new.
Originally Posted by Brent Ridley
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10-13-2012, 03:53 PM #6
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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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10-13-2012, 05:00 PM #7
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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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