does a scope need ac mains ground?

Discussion in 'Electronic Basics' started by 1jam, Feb 28, 2012.

  1. 1jam

    1jam Guest

    I just found out, much to my surprise, that none of the outlets where I have
    my oscilliscope are grounded. Would this affect performance?


    --
    Praise God from whom all blessings flow
    1jam, Feb 28, 2012
    #1
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  2. 1jam

    Jamie Guest

    1jam wrote:

    > I just found out, much to my surprise, that none of the outlets where I have
    > my oscilliscope are grounded. Would this affect performance?
    >
    >

    Most likely not however, I would careful about using your scope on
    hot chassis.

    Jamie
    Jamie, Feb 28, 2012
    #2
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  3. 1jam

    Guest

    On Tue, 28 Feb 2012 13:24:08 -0900, 1jam <> wrote:

    >I just found out, much to my surprise, that none of the outlets where I have
    >my oscilliscope are grounded. Would this affect performance?


    It's certainly not safe but it's not going to affect the performance.
    , Feb 29, 2012
    #3
  4. 1jam

    Guest

    On Wed, 29 Feb 2012 12:09:03 +1100, John G <> wrote:

    >on 29/02/2012, 1jam supposed :
    >> I just found out, much to my surprise, that none of the outlets where I have
    >> my oscilliscope are grounded. Would this affect performance?

    >
    >And how come you have 3 prong sockets with no ground connection?
    >
    >Sureley thats against any jurisdictions code in this day and age. :-?


    There are exceptions (grandfathered structures with a GFCI) but they should be
    marked as ungrounded.
    , Feb 29, 2012
    #4
  5. 1jam

    David J Guest

    It is generally beter to float the scope (no AC mains Gnd). If you want to
    test mains voltage with your scope if the probe is referenced to mains Gnd -
    good by probe!!!

    "1jam" <> wrote in message
    news:4f4d5408$...
    >I just found out, much to my surprise, that none of the outlets where I
    >have
    > my oscilliscope are grounded. Would this affect performance?
    >
    >
    > --
    > Praise God from whom all blessings flow
    David J, Feb 29, 2012
    #5
  6. 1jam

    Phil Allison Guest

    "David Jerk"

    > It is generally beter to float the scope (no AC mains Gnd).


    ** No way - that is very dangerous for the operator.


    > If you want to test mains voltage with your scope if the probe is
    > referenced to mains Gnd - good by probe!!!


    ** Absolute bullshit.



    .... Phil
    Phil Allison, Feb 29, 2012
    #6
  7. 1jam

    Jamie Guest

    Phil Allison wrote:
    > "David Jerk"
    >
    >
    >>It is generally beter to float the scope (no AC mains Gnd).

    >
    >
    > ** No way - that is very dangerous for the operator.
    >
    >
    >
    >>If you want to test mains voltage with your scope if the probe is
    >>referenced to mains Gnd - good by probe!!!

    >
    >
    > ** Absolute bullshit.
    >
    >
    >
    > ... Phil
    >
    >

    look out! Two down unders going at it!


    Jamie
    Jamie, Feb 29, 2012
    #7
  8. 1jam

    Phil Allison Guest

    "Jamie the Radio Ham TROLL "
    >
    > look out! Two down unders going at it!
    >


    ** Err - what make you so sure " David J " is an Aussie?




    .... Phil
    Phil Allison, Mar 1, 2012
    #8
  9. 1jam

    Chiron Guest

    On Thu, 01 Mar 2012 12:58:00 +1100, John G wrote:

    > Yes who said he was from the better part of the world? He sounds like a
    > Yank candidate for a Darwin award to me.


    "Better?" Isn't Australia where they sent all the criminals that they
    didn't wind up hanging? Where they have foot-wide spiders that want to
    kill you? And where God put together things from spare parts left over,
    and wound up with the platypus?? I mean, they named a whole *town* after
    Darwin...

    Sure, we Yanks have our problems, but we're not doing so badly for a
    primitive country. There is every hope that we might have civilization
    here eventually.

    --
    If God had wanted us to be concerned for the plight of the toads, he would
    have made them cute and furry.
    -- Dave Barry
    Chiron, Mar 1, 2012
    #9
  10. 1jam

    Chiron Guest

    On Thu, 01 Mar 2012 18:44:33 +1100, John G wrote:

    > We only had to take convicts after you lot could not handle the job. lol
    > then we advanced quickly.
    > No death penalty, Metric measure like the better part of the world, a
    > debt to GDP ratio far and away better than most.


    All true. Still, I refer you to this authoritative article:

    http://www.theonion.com/articles/nation-trying-okay,27444/

    Anyway, Australia is one of the very few places I wouldn't mind living.
    All those other places have too many foreigners.

    --
    Truth has no special time of its own. Its hour is now -- always.
    -- Albert Schweitzer
    Chiron, Mar 1, 2012
    #10
  11. 1jam

    Fred Abse Guest

    On Wed, 29 Feb 2012 17:18:05 -0500, David J wrote:

    > It is generally beter to float the scope (no AC mains Gnd). If you want to
    > test mains voltage with your scope if the probe is referenced to mains Gnd -
    > good by probe!!!


    That is extremely dangerous advice.

    Especially when expressed in a public forum.

    --
    "For a successful technology, reality must take precedence
    over public relations, for nature cannot be fooled."
    (Richard Feynman)
    Fred Abse, Mar 1, 2012
    #11
  12. 1jam

    Guest

    On Thu, 01 Mar 2012 09:53:59 -0800, Fred Abse <>
    wrote:

    >On Wed, 29 Feb 2012 17:18:05 -0500, David J wrote:
    >
    >> It is generally beter to float the scope (no AC mains Gnd). If you want to
    >> test mains voltage with your scope if the probe is referenced to mains Gnd -
    >> good by probe!!!

    >
    >That is extremely dangerous advice.
    >
    >Especially when expressed in a public forum.


    ....with the name "basics".
    , Mar 1, 2012
    #12
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