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oscilloscope without wire ground

Discussion in 'Electronic Basics' started by Tobias Gadelha, Jul 28, 2013.

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  1. Em terça-feira, 30 de julho de 2013 02h01min58s UTC-3, Phil Allison escreveu:
    Phil

    I'm from Brazil and here N= Neutral ; L1 =220V (-120º); L2=220V (0º) and L3(+120º) therefore L1 in oscilloscope will be GND and L2 the prove.
    Is it possible with the wire groud conected in the jack?
     
  2. Phil Allison

    Phil Allison Guest

    "Tobias Gadelha"

    I'm from Brazil and here N= Neutral ; L1 =220V (-120º); L2=220V (0º) and
    L3(+120º) therefore L1 in oscilloscope will be GND and L2 the prove.


    ** My god, the fool IS mucking about with 3 phase power !


    Is it possible with the wire groud conected in the jack.


    ** Question time:

    Have you got a dual trace /channel scope with "invert" function on one
    channel ?

    Do you have two 10:1 probes ?

    If so, others have given you the answer already.

    BTW:

    3 phase power is VERY DANGEROUS !!!

    Beginners should NOT be touching it.



    .... Phil
     
  3. Tom Biasi

    Tom Biasi Guest

    I made my point clear Phil.

    You said, "Neutral conductors are always linked to ground at the service
    box."

    I said," In the USA neutral and ground are "usually" connected at the
    service box but not always."

    That's clear enough.
    No need to go beyond that.

    Tom
     
  4. Phil Allison

    Phil Allison Guest

    "Tom Biasi"

    ** Clear as mud - pal.

    ** NO it is NOT !!!!!!!!!
    ** It must be connected to ground somewhere - or else it is simply NOT a
    neutral.

    Ever see the movie "Groundhog Day" ??


    .... Phil
     
  5. Em domingo, 28 de julho de 2013 15h49min54s UTC-3, Tobias Gadelha escreveu:
    ok people, resolved. thanks
     
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