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I have an old 115V AC motor, Type FZ, Frame 56Y, 1/3 HP, 1725

 
Sir Sparks's Avatar
  • Answered by:Sir Sparks
  • President/Owner/ Master Electrician
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Customer Question

I have an old 115V AC motor, Type FZ, Frame 56Y, 1/3 HP, 1725 rpm, Phase 1, and it says "use with MDS capacitor." It has three wire, black, white and brown. I want to use it for belt sander. How do I connect the three wire into regular 115V house current?
KT

 

Optional Information:
Make: Westinghouse
Model: 313P 025A

Already Tried:
Connect black (live) and white (neutral) to house wire, without connecting brown wire. It did not work.

Submitted: 1100 days and 17 hours ago.
Category: Electrical
Value: CA$17
Status: CLOSED
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Expert:  Sir Sparks replied1100 days and 17 hours ago.

Hi,

 

Is there presently a capacitor attached to the motor?

Is there signs that one used to be attached?

Customer replied1100 days and 17 hours ago.

No capacitor attached. A friend gave it to me more than 35 years ago. I suspect this was from an old washing machine.

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Expert:  Sir Sparks replied1100 days and 17 hours ago.

Well you will need a capacitor. Even with one I cannot be certain of what size it would be (in UF or MFD.) and the definite wiring although I could make a good guess.

Customer replied1100 days and 16 hours ago.

All it says on the motor name plate is:

"Use with 170 MFD Capacitor" and no further description.

 

I tried it by connecting brown wire to ground wire on house receptable, and it runs OK. However, when I switched off without disconnecting, it had started running at very slow speed. I know it is dangerous so I disconnected it. Could you tell me what kind of capacitor I need and how to connect to wire?

 

Thanks,

KT

Accepted Answer

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Expert:  Sir Sparks replied1100 days and 15 hours ago.

NORMALLY *(No guarantees) a 5 UF 370 volt capacitor connected across white and brown with supply across white and black as normal. Don't accept yet, let me know how it works.

 

Expert TypePresident/Owner/ Master Electrician
Category: Electrical
Pos. Feedback: 99.2 %
Accepts: 2519
Answered: 6/15/2010

Experience: US State Certified & UK Electrical Contractor for all electrical fields/disciplines

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Customer replied1100 days and 13 hours ago.

Hello Sir Sparks,

 

Thanks for info. I will try to buy it somewhere locally if I can find it, and let you know when I try it. Not sure how soon, though. Thanks so much.

 

KT

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Expert:  Sir Sparks replied1100 days and 12 hours ago.

Neutral feedback hurts me and is for no reason. I CLEARLY told you not to accept my answer yet! I will not assist you further.

 

Sir Sparks40344.1542845718

Customer replied972 days and 21 hours ago.

Dear Sir Sarks,

I had tried your suggestion, and it worked, then found another major problem of damaged wiring due to much too old and heavily used motor. No way to save motor, and I sent it to recycle. Thanks for your advise and local repair shop appraisedyour replay, as it worked. Thanks so much.

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Expert:  Sir Sparks replied972 days and 21 hours ago.

Thank you, XXXXX XXXXX Just answer and ask them to remove the neutral feedback as you are now happy with my correct answer,

 
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