Getting shocked... a lot

Discussion in 'Power Supplies and UPS's' started by Ferg, Sep 23, 2007.

  1. Ferg

    Ferg Manbearpig

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    -Don't know if this is the right sub-forum but its the only one slightly about electronics, feel free to move me :) -

    Ok occasionally (and I mean occasionally - if it were happening all the time it would be much easier to solve by elimination) I am getting shocked by all parts of my rig, it could be either of the two CRT's, any of the cables or the main tower itself.

    When this is happening I have sometimes quickly got my multimeter out and using the bare wall as the ground (its an old barn) I can detect a fluctuating voltage between 0 and about 1.5 volts (its a digital multimeter) the numbers jump around all over the place tho which is making me think that perhaps it is a static build up? - I'm not very hot on the workings of electricity but I muddle by.

    It has to be said that I did think it was my old PSU (an old chieftec 320w from the first year of uni) but that recently blew and I treated myself to a shiney new system with an OCZ 600W PSU so no longer think that it is hardware at fault. I have checked all cableing for exposed copper and double checked my PC that it isnt earthing a live through the case but all is well.

    This has all started happening since I moved to this barn (I don't trust the ring mains here - and am slowly replacing all the ring main circuits and lighting circuits but don't plan to do the area where my PC is situated for a long time) Could I drive a metal pole into the ground outside and attach a cable to that and through to the case of my PC to ground this charge? Do any of you think it maybe isnt static charge? I'm a bit lost to tell the truth and it is driving me round the bend trying to find the culprit when it seems a few minutes after I get a shock it no longer gives one out.

    TIA

    ferg
     
  2. RHochstenbach

    RHochstenbach Administrator Staff Member

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    First check if the AC power is just as high as in the house. Because most garages and barns in Europe got a higher voltage (280V or something). And you could try to ground the pc with a cable.
    It happened from the moment that you moved to the barn, so I don't think so. I think that the barn isn't grounded enough or the AC power is too high.
     
  3. Ferg

    Ferg Manbearpig

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    Thanks mate - interesting stuff. Can I use a bog-standard multimeter to test the voltage in here or do you need something special?
     
  4. Ghostman 1

    Ghostman 1 Moderator Staff Member

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    You are using a surge protector Right ? Too me it sounds like the barn is not wired right...
     
  5. Ferg

    Ferg Manbearpig

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    Yup always have a surge protector for my pc's
     
  6. RHochstenbach

    RHochstenbach Administrator Staff Member

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    Yeah a standard multimeter will do.

    This is also possible. If the multimeter shows a normal volt rating, you might need to let an electrician check the wires.
     

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