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Thread: Instsalling a 120v DPST timer to 240v pump possible?

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    Join Date
    Sep 2014
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    Instsalling a 120v DPST timer to 240v pump possible?

    I have a 120v woods 59103r DPST timer from a prior install when the pump was 120v. We went with a bigger pump to pool water through a solar collector and had to run 240v for the pump. Would it be feasible to re-use the old timer and run the 120v lines from the breaker to 1/3 and then load from 2/4 to the pump and just forget the neutral all together?

    TIA

    http://www.ccixpress.com/cci/Marketi...nstrMan_TM.pdf

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    Mod Squad jblizzle's Avatar
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    Re: Instsalling a 120v DPST timer to 240v pump possible?

    Welcome to TFP!!!

    I am not sure that will work because the timer is not setup to run on 240V and would still require a neutral. Which would also mean that only one side of the 240V LINES would be running the clock and would throw a GFCI breaker, assuming you have one.
    Jason, TFP Moderator
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    Mod Squad JohnT's Avatar
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    Re: Instsalling a 120v DPST timer to 240v pump possible?

    For a 220/240 pump you don't use the neutral anyway. You need a two-pole timer to switch both lines and a timer motor that runs on 220/240.
    TFP Moderator
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    Re: Instsalling a 120v DPST timer to 240v pump possible?

    Was afraid of that. Thanks for the quick replies and help.

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