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Thread: AO Smith Century Two-Speed Wiring Issue

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    AO Smith Century Two-Speed Wiring Issue

    We are currently in the process of building a pond, and really don't want to hire someone to come out and wire this little motor for us. The motor's CAT number is B2981, and it has 3/4 HP. We've gotten the electrical box open, but AO Smith's wiring information is a little bit shotty. Once again, it is an AO Smith Century two-speed split capacitor motor/pump.

    If someone is experienced in dealing with this motor's wiring, or can point me to some sort of diagram, I'd be thankful.

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    Join Date
    Jun 2010
    Pleasanton, CA

    Re: AO Smith Century Two-Speed Wiring Issue

    There is a tiny bit of wiring info at the bottom of this website: ... flange.htm

    14K gallon plaster pool with spa, solar heated, Intelliflo VS pump, Pentair Clean & Clear cartridge filter, using BBB, TF-100 test kit

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: AO Smith Century Two-Speed Wiring Issue

    You should have three terminals in the pump, L1 L2 & A. Neutral shoud go to L2 (com) and hot should hook to A for low speed and L1 for high speed.
    What are you trying to wire it to? A switch or a timer?
    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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