2 wire pump wiring

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by TKB4, Dec 6, 2018 at 4:10 AM.

  1. TKB4

    TKB4 New Member

    Joined:
    Dec 2, 2018
    Location:
    west tennessee
    If a 2 wire pump is wired wrong with one of the 110 legs wired to the ground and the ground wired to one of the 110 legs would this normally damage the pump or capacitor or just trip the circuit breaker. Wouldn't this definitely flip the circuit breaker whether other damage was caused or not ?
     
  2. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    Don't think it would trip the breaker. Just not enough voltage for the motor to do anything. I have seen 3 wire motors run on half voltage, but not a 2 wire.
     
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  4. banjo bud

    banjo bud Member

    Joined:
    Sep 24, 2018
    Location:
    South Carolina
    I would think it would depend on which leg of the 110 is used for the switch. Both are not hot. One is hot and the other is a return, which goes to ground. So if you switch the return with the ground, I’d think the pump would run normally. If you switch the hot with the ground, I’d think you’d create a direct short and the breaker would trip. I don’t think either would damage the pump. But some experts here I’m sure will chime in.
     
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Banjo Bob, I may have misunderstood your post.
     
  6. banjo bud

    banjo bud Member

    Joined:
    Sep 24, 2018
    Location:
    South Carolina
    Im saying that there is only one side of a 110 v that is hot. In a 3 wire romex cable, one is hot (black), one is a return (white), and one is a ground, (bare). The return and the ground go to the same place....ground. So if he switches the return and ground, no harm no foul, the pump works. Although it won’t pass code. However, if he switched the hot with the ground, it would be a short circuit and trip the breaker.
     
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