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Thread: Capacitor Polarity?

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    Join Date
    Nov 2015
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    Houston TX
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    Capacitor Polarity?

    I have a 1.5HP pump (old Magnetek B2854 aka 717721624). My pump motor hums when it is turned on but will not turn over. I shut the power of at the breaker, verified that it wouldn't turn on, took the strainer out so I could get to the impeller to verify it spins freely (which it did). I then took the hump off the motor to get to the capacitor. I discharged the capacitor before looking at the leads and taking them off.

    The capacitor has so much rust on it that I can't read the numbers but verified that it was a 370VAC 30 MF capacitor which is pretty standard for these motors it looks like. I got mine off Amazon for $15. My question is: I can't tell if there is polarity on the capacitors or if you can just hook the leads back up either way.

    Here is the one I purchased. http://www.amazon.com/Motor-Capacito...ilpage_o00_s00
    28,000 in ground gunite. 3.5' shallow end, 8' deep end with 8' waterslide. Only metal in the pool is the pool light.

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    Mod Squad Bama Rambler's Avatar
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    Re: Capacitor Polarity?

    It's an VAC capacitor, there's no polarity. You can hook it up either way.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Capacitor Polarity?

    Awesome! Thank you!
    28,000 in ground gunite. 3.5' shallow end, 8' deep end with 8' waterslide. Only metal in the pool is the pool light.

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    Re: Capacitor Polarity?

    Received the Capacitor and installed it in 5 minutes. Pump is back to full operation. Thanks for your help!
    28,000 in ground gunite. 3.5' shallow end, 8' deep end with 8' waterslide. Only metal in the pool is the pool light.

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    Mod Squad Bama Rambler's Avatar
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    Re: Capacitor Polarity?

    Much thanks for coming back and letting us know the outcome. A lot of times we give advice and people never come back and let us know if it helped. Thanks much.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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