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New Theory: Neighbours causing short circuits.

Discussion in 'Electronic Design' started by Skybuck Flying, Aug 6, 2008.

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  1. Hello,

    I live in an appartment.

    Once I noticed how my computer crashed which sounded like a crazy power

    So I wonder:

    What happens if my neighbours cause a short circuit in the wall socket...

    Could that effect my equipment as well or are appartments somehow protected
    from that ?

  2. Leon

    Leon Guest

    It's quite likely. You can buy power distribution units with filers
    and surge suppression built-in.

    My PC switched itself off recently during a thunderstorm when there
    was a lightning strike.

  3. Guest

    My computer made a neat beeping sound whenever I discharged a 200,000V
    stun gun within 3 feet of it...

  4. 007

    007 Guest

    It's a locked ward?
  5. Per Skybuck Flying:

    I'd spend the bucks on a UPS (Uninterruptible Power Supply).

    My understanding of UPSs is that they will insulate your PC from
    the surges and give you a few minutes to shut it down gracefully
    if there's a power failure.

    Maybe somebody with some real knowledge can chime in.
  6. Eeyore

    Eeyore Guest

    No, it was space aliens.

  7. Guest

    Spark is about 2 or 3 cm max (the electrode spacing). But it's
    bright, and loud. Uses 2 9V batteries.

    It looks just like this one:|39:1|66:2|65:12&_trksid=p3286.c0.m14.l1318

    I played around with it during my undergrad years, about a decade
    ago. (Not on anyone though - 200 kV has got to hurt.) It didn't seem
    to damage my machine though at the time... (350 MHz AMD I believe it

  8. If your apartment neighbors cause a short circuit in the wall socket,
    I'd be more worried about them burning down the building.

    Alan Nishioka
  9. Guest

    Or the antineutrinos which were created when potassium-40 in his
    banana underwent beta decay.

    (Man, is that a funky sentence or what...)

  10. Guest

    Your computer has got the Plague. Capacitor Plague, Inductor Plague,
    Transistor Plague.
  11. Larry Elmore

    Larry Elmore Guest

    That's right. The only solution is the hoof-and-mouth disease cure --
    you must immediately destroy and cremate ALL of your computers before
    the disease spreads any further. If you're unwilling or unable to do
    this, there are any number of readers on comp.arch who will be eager to
    assist. Anything to stop the incessant, brainless drivel spewing forth!

  12. OK smart ass. Tell us why:

    Most low power HV AC will not initiate an arc at that distance, but
    would maintain one once started.

    The stun gun is an AC device, and why not DC.

    The arc most certainly would initiate if it were a DC source of that

    As for the above, lightning strikes usually involve spikes ending up on
    the power feeds. Such power line anomalies can easily cause a reset,
    much less a beep.

    The close proximity of the stun gun means a lot of HF flux gets
    generated. If it is local enough to a high clock rate product, it can
    introduce a glitch.

    Such transients are usually very temporal, and only have an effect
    during the period in which they occur. If it does nothing at the time it
    happens, it won't later either. If it does something when it happens, it
    likely will not have any lingering effect. The only exception is if a
    hard drive write was taking place at the moment the glitch is introduced.
  13. Hammy

    Hammy Guest

    You do realize your "NUT'S".
  14. Den

    Den Guest

    Thats not me...... :~)

    AIUI, "double online converters" do the clean up as you stated:

    AC --> Rectified - float charge batteries --> inverter to AC out.

    The cheap and nasty ones (like mine) run the line ac in and out via a relay,
    on power fail the inverter cranks up and the output is switched to be
    sourced from the inverter circuit.
  15. No I am ok.

    I did pay for the new power supply which has all kinds of protections.

    But so far I am not using it.

    My seasonic s12 600 watt power supply seems to be just fine.

    It was a bad memory chip causing problems.

  16. w_tom

    w_tom Guest

    Power supplies must make such events irrelevant. For example, a
    power supply must completely lose power for 17 milliseconds and work
    just fine. With less load, that power supply should remains powered
    even longer.

    Any filters, etc recommended by others must be in the power supply.
    Those features that make power supplies so robust sometimes get 'lost'
    when the computer assembler buys only on 'dollars and watts'. If the
    power supply needs those line conditioners (ie $100+), then how much
    did the computer assembler save when buying a $20 supply instead of
    the $60 supply?

    No short circuits by a neighbor should cause any damage to any
    electronics. However, electrical problems in one house has been
    observed to cause problems in other homes - even a wire glowing red
    hot inside the wall according to fire department IR viewers - because
    the homes were not properly grounded. Earth ground serves many
    masters. In that 'near fire' situation, both homes has earth grounds
    removed. Therefore a TV cable was conducting too much current -
    literally could be seen inside the wall using fire department's IR
    vision equipment.

    If a neighbor's short circuit caused problems in your appliances,
    then you may have some wiring problems or fundamentally defective
    appliances. Are filters required in all electronics missing in your
  17. Rod

    Rod Guest

    There's an easy way to tell, it's rather complex so I'll list it in
    point form. I'll assume you're a reasonably normal human being
    (likely a mistake, but we'll just contine, won't we...)

    - Enter kitchen.
    - Open utensil drawer.
    - Select knife (any knife will do, doesn't need to be sharp)
    - Grab bucket.
    - Go to bathroom and fill bucket with water.
    - Enter shower.
    - Turn faucet on until you are completely drenched with water.
    - Carry knife into the room your PC sits.
    - Remove socket that your PC is plugged into.
    - With your free hand, place it into the bucket of water.
    - With your hand holding the knife, stick it into the wall socket.
    - Report back your findings.

  18. Walter

    Walter Guest

    you should hope the poster is not as stupid as you.

    It an offence to assist someone to commit suicide

  19. Not only that, but if it is a plastic bucket, it does absolutely
    nothing, as there is no path. If it is a metal bucket, it would have to
    be sitting on concrete or other conductive, grounded surface, for there
    to even be any danger present, or actually be grounded with wire. Then,
    there is the fact that most knives will not fit into most US AC wall
    receptacles. At least not far enough in to make contact. It would be
    far easier just to slit a nice large artery with the knife, which is what
    the goddamned cross-posting bastard that started this horseshit thread
    should do to himself.
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