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How to determine Neutral/Live from transformer output

Discussion in 'Datasheets, Manuals and Component Identification' started by abuhafss, Nov 13, 2019.

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  1. abuhafss

    abuhafss

    348
    11
    Aug 3, 2010
    Hi

    Recently I received 110VAC pneumatic Solenoid Valves from AliExpress, though I had ordered for 12VDC. To save time I decided to use them but here we have 220V 50Hz.

    Since the solenoids are very small, I planned to wind a small step down transformer. The question is how do I identify the neutral and live wires from the 110VAC output of the transformer? Or I just connect any one wire directly to the solenoids and the other wire thru relays?
     
  2. Bluejets

    Bluejets

    5,617
    1,190
    Oct 5, 2014
    There is no neutral or active until the output is referenced to ground.
    Your final guess is correct.
     
    davenn likes this.
  3. abuhafss

    abuhafss

    348
    11
    Aug 3, 2010
    OK, thanks for the input.
     
  4. duke37

    duke37

    5,364
    772
    Jan 9, 2011
    If you wind an auto transformer then neutral in = neutral out.
     
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