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Tool Talk Discussion Forum

START CAPACITOR FOR 1/2 HP MOTOR

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jimlll

02-08-2004 14:44:17




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I have been given an Emerson model 7896 110/220 volt motor that is missing the start capacitor. Does anyone know what capacity this capacitor should be?
Thanks for any advice
Jim




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jimlll

02-09-2004 18:54:57




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 Re: START CAPACITOR FOR 1/2 HP MOTOR in reply to jimlll, 02-08-2004 14:44:17  
Thanks for the comments. I really appreciate the time and effort that you all contributed.
jim



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KeithF

02-09-2004 09:40:46




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 Re: START CAPACITOR FOR 1/2 HP MOTOR in reply to jimlll, 02-08-2004 14:44:17  
I had a similar experience with another brand of motor. I called the factory with the model and serial number and they looked it up and gave me the original capacitance for the motor. Good luck.



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Burlgoat

02-08-2004 17:00:40




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 Re: START CAPACITOR FOR 1/2 HP MOTOR in reply to jimlll, 02-08-2004 14:44:17  
Jim
That should take a 7.5 or a 10 mfd 370 start cap.Look on the I.D. plate of motor see if it is listed there.



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Bob

02-08-2004 18:04:20




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 Re: Re: START CAPACITOR FOR 1/2 HP MOTOR in reply to Burlgoat, 02-08-2004 17:00:40  
That 10 mfd or 15 mfd rating would be for a RUN capacitor, if used. Those values would be WAY inadequate for start capacitor use.

If he needs the start capacitor, it will be something like 250 mfd, rated at least 125 Volts.

This value is close enough to use for average applications.

It might be as high as 350 mfd at 250 Volts.

The value is not critical, for average use, but if the motor starts heavily loaded, the closer to the original rating the better!

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Burlgoat

02-09-2004 04:25:50




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 Re: Re: Re: START CAPACITOR FOR 1/2 HP MOTOR in reply to Bob, 02-08-2004 18:04:20  
BOB
You are correct I wasn't thinking clearly yesterday.Our Church Held a special service for my brother who passed away DEC.22 from cancer.
Thanks for correcting my mistake.



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Bob

02-09-2004 06:46:51




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 Re: Re: Re: Re: START CAPACITOR FOR 1/2 HP MOTOR in reply to Burlgoat, 02-09-2004 04:25:50  
B. G.,
Sorry to hear of your loss.



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