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Thread: L1 and L2!!

  1. #27
    Join Date
    Nov 2011
    Location
    texas
    Posts
    40
    Quote Originally Posted by snewman24 View Post
    If we're still talking about the circuit below, then for purposes of how the motor circuit works there isn't any difference. That circuit would usually be a 240V single phase circuit, where "line" is L1 & the other "line" is L2 and both are "hots" and there is no neutral.

    If the compressor were rate for 120V instead, one "line" would be L1, and the other "line" would be Neutral, "N", because it's connected to the center tap at the transformer, but for all practical purposes nothing has changed except the voltage.

    Don't get hung up on the term "neutral". It's a power wire just like L1 is. It brings power into the run cap just like L1 does. Power comes in thru L1 and leaves thru N, and it also comes in on N and leaves thru L1, alternating back and forth.

    Thank you very much. I never really had a thought l1 and l2 had a relevant difference in voltage or function of each other, but I needed to ask. But, y'all have pretty much cleared up the differences between 'hot' and 'neutral'.

  2. #28
    Join Date
    Nov 2011
    Location
    texas
    Posts
    40
    Because of that small lesson alone I'm able to read pretty much any circuit in my book now.

  3. #29
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,616
    Great!
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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