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Help with powering immersion heater!!!

Discussion in 'General Electronics Discussion' started by shivosaurus, May 1, 2016.

  1. shivosaurus

    shivosaurus

    1
    0
    May 1, 2016
    Hey all! So first off, I'm completely new to this stuff, so please go easy on me and try to explain in the simplest way if you can!

    I'm building an arduino project that requires I heat a tank of water to boiling point fairly quickly. I couldn't find anything that worked fast enough/had enough power given the limited voltage of the arduino uno, so I decided to buy an electric kettle and take out the heating component to use it plugged into an outlet and connected to the arduino with a relay. The problem-- I can't seem to get the immersion heater to turn on for testing via the power cord.

    It's 120V, 1500 W. I attached some pictures of the heater before and after my really crappy soldering job. I figured that the two leads were either hot or neutral (and can be interchangeable), and the copper plate thing in the middle was for ground. On the end of the power cord, it said the green wire was for grounding, but didnt mention about the other two wires, so I assumed they were also interchangeable for neutral and hot. So I soldered the green wire from the power cord to the copper plate on the heater, and one of the other two wires from the power cord onto one of the heater's leads. Tested it, but heater wont turn on.

    Am I connecting the ground/hot incorrectly? Or maybe my soldering job is crappy and didnt make the connection? Or is it because I left neutral alone for the testing process?

    Any input would be very much appreciated!!! 13062439_10209532419773469_453113090447397198_n.jpg 13118976_10209532420333483_4763967074778195800_n.jpg 13118976_10209532420333483_4763967074778195800_n.jpg
     
    Last edited: May 1, 2016
  2. Minder

    Minder

    2,855
    593
    Apr 24, 2015
    Did you measure the resistance across the terminals, should measure ~16ohms.
    Even if it had internal over temp, it would still initially power up.
    M.
     
  3. Alec_t

    Alec_t

    2,686
    710
    Jul 7, 2015
    If neutral wasn't connected to the element then it would not work.
    Please don't electrocute yourself. Working with unprotected connections like that is very dangerous.
     
    KeithM likes this.
  4. 73's de Edd

    73's de Edd

    2,694
    1,092
    Aug 21, 2015
    .

    [​IMG]



    GND connects to the AC cords round ground pin . . . via a GREEN wire.

    "So I soldered the green wire from the power cord to the copper plate on the heater, and one of the other two wires from the power cord onto one of the heater's leads. Tested it, but heater wont turn on."

    That units heating element is internally electrically isolated from any surrounding metal, by a bisque ceramic surround.
    You will need a WHITE color coded NEUTRAL wire (or a wide blade on the AC plug or a ribbed wire on the AC cord) attaching to one of the resistance elements connections and another BLACK color coded HOT wire (or a narrow blade on the AC plug or a non-ribbed wire on the AC cord) attaching to the other resistance elements connection.
    THEN it will make hot-hot for you...



    73's De Edd


    .
     
    Last edited: May 2, 2016
  5. Bluejets

    Bluejets

    3,489
    706
    Oct 5, 2014
    Agreed. Also what concerns me is it is yet to be stuffed into a bucket of water.....⚡️⚡️
     
    duke37, Alec_t and KeithM like this.
  6. BobK

    BobK

    7,632
    1,657
    Jan 5, 2010
    If this is an immersion heater, and you connected power without the element immersed in water, you probably burned it out.

    Bob
     
    duke37 likes this.
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