1. ## capacitors

Is there any way to determine what size capacitor a motor uses without any info but the from the motor itself?????

2. Call the local supply house or look on the data plate.

3. Data plate on the motor.

4. Indeed , but on compressors thay do not give this info and late at night with no way to tell i guess there is not a magical solution?

5. You are correct compressor do not. Not for sure where to find it on an after hours call.

6. Smartphone knows

7. Smartphone maybe the way to go then. At any rate A good guess got them thru.

8. If it is on a Copeland compressor Copeland makes an electrical handbook for all of their motors and units. You can get one at most supply houses. I highly suggest it. I can't count how many times its been midnight on a Friday or Saturday and I go to the book and find out what relay or capacitor I need.

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9. Thankyou

10. Here's the Copeland Electrical Handbook 2010-2011 Edition from Powell's website, hvacrinfo.com.

There's an APP from Copeland too, called Copeland X-Ref.

And here's a link to the Tecumseh ESP Guidebook R3 which will also come in handy.

Tecumseh also has their compressor electrical info available online here:
(This one is still in a basic format, but will be added to their website sometime in the near future. Thanks to Andy Schoen for providing us with a link to it. )
Last edited by Educational Committee; 10-01-2012 at 02:07 PM. Reason: Updated Copeland Handbook Link

11. That's good to know. Have to get me one now.

12. Originally Posted by toocoolforschool
Is there any way to determine what size capacitor a motor uses without any info but the from the motor itself?????
First measure the voltage between the two points from running capacitor. Then measure the amps to start winding. Then use the equation below mentioned
2653*amps/volts

Moideen-Dubai

13. Originally Posted by moideen
First measure the voltage between the two points from running capacitor. Then measure the amps to start winding. Then use the equation below mentioned
2653*amps/volts

Moideen-Dubai
That will tell you what uF the working cap is. but won't tell you if its the right size cap. And if the cap is bad, and the label is not readable, you won't know what size cap to use.

Copeland has a manual with the cap listed for each compressor they make.

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