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3 wires circuit

Discussion in 'Electronics Homework Help' started by ahsampa, Apr 20, 2016.

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  1. ahsampa

    ahsampa

    2
    0
    Apr 20, 2016
    need help!
    I have a question about 3 wires circuit, according to the circuit of attached photo, why neutral wire carry 6A?
    the article says L1 draws 10A, L2 draws 4A, L1-L2=10A, but why?

    the question traps me for quite long time.. really appreciate someone can give me an explanation.. thank you very much..
     

    Attached Files:

  2. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    Welcome to EP
    Which of the circuits are you referring to 3.41 or 3.42 ?
     
  3. Minder

    Minder

    3,016
    641
    Apr 24, 2015
    If both loads were equal, the current in the neutral would be zero.
    If unbalance you see the difference in the neutral.
    M.
     
  4. ahsampa

    ahsampa

    2
    0
    Apr 20, 2016
    thanks! what a mistake, I look at 3-42 cuicuit all the way.. it's 3-41, that solve my problem..

    negative feeder carries 10A, negetive feeder carries 4A, so neutral carries 6A..
     
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