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  1. #1
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    Question Installing a float switch on my system.

    Howdy all,

    I am finally getting around to installing a float switch (low water level cut off) for my pump.

    Basically, I just want to make sure the pump cuts off before the water level drops too far in the poly tank, so as not to cause any damage to the pump.

    2018-06-13 18.12.47_r.jpg s-l500.jpg

    I do not wish to drill any holes in the tank. And, I have 2 each, 3/4" pipe threaded holes on opposite sides of the top of the tank. I am going to drill a hole in a plastic pipe plug, just large enough to thread the float switch cable through it, and into the tank.

    ''_threaded_plug.jpg
    Then, I will seal it with a bit of silicon.

    Am I correct in thinking I only need to break the connection on the hot side of the two-conductor cable coming into the pump, and wire the float switch in series?

    I have already determined which pair (of the three wires) attached to the float switch, that I need to connect, so it will break the circuit when the tank reaches the preset "low" water level.


    NOTE: I initially thought about using a piggy back plug, since the pump is just connected to a power point on the wall of the house. But, later I just decided it best to wire the float switch directly to the hot side of the mains power to the pump.
    Last edited by Asia-Off-Grid; 09-22-2018 at 04:30 AM.
    Paul

  2. #2
    Yes in America you only need to break the hot side... but are you 120/240 like we are here? Or are you European 240 with no neutral, really probably doesn't make a difference, break one side of the 240 will turn off the pump, but the wiring will still be hot on one side.

    Rancher

  3. #3
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    Quote Originally Posted by Rancher View Post
    Yes in America you only need to break the hot side... but are you 120/240 like we are here? Or are you European 240 with no neutral, really probably doesn't make a difference, break one side of the 240 will turn off the pump, but the wiring will still be hot on one side.
    Here, we have two wires from the mains, a hot and a neutral return, 230 vac.
    Paul

  4. #4
    Is the neutral return grounded? (i.e. ground rod)

    Rancher

  5. #5
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    Quote Originally Posted by Rancher View Post
    Is the neutral return grounded? (i.e. ground rod)
    It may be where the service drop comes from the mains poles on the road. I will have to go have a look. But, it definitely isn't, anywhere on our farm property.
    Paul

  6. #6
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    Question

    Okay. I went across the road to have a look (for the first time ever) at the distribution box from the mains, to the farm.


    1. I will attach images. But, as far as I can see, there is no ground rod anywhere. There are no wires coming from the mains lines or the distribution box, to the ground anywhere around the pole.
    2. I'm glad to see that anyone walking by, can simply flip a breaker to kill our power, and / or the power feeding our two neighbors, who also have service from the same box.


    2018-09-23 16.21.04_c.jpg 2018-09-23 16.25.01_a.jpg

    So, I guess the 230vac / 50hz signal comes in to the farm on one wire, and returns on the other - with a ground somewhere, possibly, perhaps, maybe along the way? There are only two wires that come from the mains pole, to the main panel on the farm.

    Should I install a ground rod (or two) attached to the neutral, near the main panel on the farm?
    Last edited by Asia-Off-Grid; 09-23-2018 at 03:16 AM.
    Paul

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