Build a indicator for Sump pump running

Discussion in 'The Projects Forum' started by bbzappy, Feb 4, 2014.

  1. bbzappy

    Thread Starter New Member

    Feb 3, 2014
    1
    0
    I have a sump pump and the float switch is mounted on it, I need a simple solution for knowing when the pump is running (like a light bulb). Can this be done (simply) with only having access to where it plugs in ? and inexpensive. and supplies readily accessible supplies . I would appreaciate any help.
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,003
    3,232
    You could plug the pump into a current sensing power strip such as this. Then anything you plug into the strip will be turned on when the pump is running.
     
  3. burger2227

    Member

    Feb 3, 2014
    190
    24
    That depends on the current draw of the sump pump which could be rated higher than the smart strip. If the pump arm has a lever that goes up and down, then a mercury switch could be mounted on the arm to trip a light when the arm moves up or down.

    A magnetic reed switch could be used if the arm is near a wall mounting position too.
     
  4. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    If current is to high for strip solution.
    These work well.

    Run one lead thru opening.
    Led lights and switch closes at rated current.

    jumpers for 1-200 amps
     
  5. burger2227

    Member

    Feb 3, 2014
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  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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    2,369
    Normally a CT should not be operated unloaded, I do not see anything in the circuit to satisfy this?
    Max.
     
  7. inwo

    Well-Known Member

    Nov 7, 2013
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    Would a high value resistor across the ct satisfy?

    Is that to keep the theoretical voltage peak in check?
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,526
    2,369
    There is no visible load or Burden on the CT shown which has a 1:800 ratio as far as open circuit voltage is concerned.
    The idea is to measure current.
    In a C.T. the voltage is directly proportional to the winding ratio and the current inversely proportional.
    So it is necessary to place a load on the secondary, this is why unused C.T.'s have or should have a shorting link across them to avoid the possible high voltages on the secondary.
    Max.
     
    inwo likes this.
  9. BMorse

    Senior Member

    Sep 26, 2009
    2,675
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    this sounds like it is getting overly complicated, lol.....

    You just need to get another one of the sump pump float switch piggyback plugs, cut off one end and connect that to your light bulb (With the same voltage ratings as your pump), then plug this in between the float switch plug, when the float switch supplies power to turn on the pump, the light should also turn on.....

    Or you can get a double outlet and box with a cover, wire your float switch to the outlet so that it will supply power to it when the float switch is tripped, plug your sump pump into one outlet and a lightbulb/lamp in the other... whenever the sump pump comes on, the light will also. :)

    (K.I.S.S. is the simple rule I always try to follow!)
     
  10. BMorse

    Senior Member

    Sep 26, 2009
    2,675
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    does your plug look like this??
    piggyback-sample.png
     
  11. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
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    If yes, then one of these?:D And a night light.

    I still like the CTs, as it shows definitively that pump is running.
     
  12. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,302
    1,988
    I bet it does, and if it does, I would do this (with a separate cord) and wrap a secondary around the primary, with just an LED in series. No resistor. Just experiment with the turns until the LED comes on.
     
  13. inwo

    Well-Known Member

    Nov 7, 2013
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    I doubt if you can get enough coupling without a core. Have you done this?:confused:
     
  14. strantor

    AAC Fanatic!

    Oct 3, 2010
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    Nope. I got the idea from these. Had a whole bag of them, different brand, smaller size. Just a coil with an LED.
     
  15. inwo

    Well-Known Member

    Nov 7, 2013
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    I've lighted an led direct from a CT and even homemade CT (a few turns on a transformer).
    Needed a core for my experiments.
     
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