USB charger - possible to flip live and neutral wires?

Discussion in 'General Electronics Chat' started by raananh, Dec 18, 2013.

  1. raananh

    Thread Starter New Member

    May 20, 2012
    2
    0
    Hello,
    I have a pcb of a small switching AC USB charger (from an HTC phone).

    The PCB has L(live) and N(neutral) inputs. The Live input goes through a fuse and a resistor before it goes to the diode bridge (the Neutral goes straight to the diode bridge).

    In this case, is it safe to flip the Live and the Neutral (e.g. connect it to a 2 prong EU plug )?

    Originally it was connected to a 3-prong plug (although Ground was not connected).

    Thanks,
    raananh
     
  2. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    If the charger is rated for 220/230 volt. You should be just fine swapping the two lines
     
    raananh likes this.
  3. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    Voltage has little bearing on it.

    If there are no exposed conducting screws or parts, (ie. double insulated") it should be fine.

    However, your statement about an unconnected ground bothers me.
    In that case, it may not have been safe before, and will be no better now.
     
    raananh likes this.
  4. raananh

    Thread Starter New Member

    May 20, 2012
    2
    0
    Last edited: Dec 18, 2013
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