Overhead line shock

Discussion in 'General Electronics Chat' started by MIRINGU, Sep 10, 2008.

  1. MIRINGU

    Thread Starter Active Member

    Mar 18, 2007
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    hi,i've heard many pple say that if u happen to hang on overhead lines ie your legs above the ground,you can't get a shock.:mad:
    Knowing very well that AC as little as 110v or 240v gives a shock.But overhead lines carry more than 11kv how true is the matter????
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    As long as you don't come in contact with another conductor, it's very true. look at all the birds that can sit on any power line in perfect safety.

    I might say that dangling from a hot power line might not be a smart thing to do...
     
  3. mik3

    Senior Member

    Feb 4, 2008
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    Theoretically, its allright to hang from a wire but practically is not very safe. This is because you may be very close to ground or other wires and cause sparks and get shocked. If the distance between you and an object is little and the voltage is high then the breakdown voltage of the air (3000000 V/m) may be reached. Another reason is the capacitance between you and ground. If it gets large enough then a significant amount of current will flow and you will get shocked.
     
  4. Audioguru

    New Member

    Dec 20, 2007
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    There was a video that showed guys being placed on very high voltage electric transmission lines from a helicopter. They needed to charge themselves with a pole that made huge sparks. Then they needed to discharge themselves when they moved away.

    The air made the second wire. Birds would be zapped if they flew near.
     
  5. mik3

    Senior Member

    Feb 4, 2008
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  6. MIRINGU

    Thread Starter Active Member

    Mar 18, 2007
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    So one can hang on the line only if he/she is sure the ground clearance area(distance btw u and the line) is big enough.But am not saying i'll try.
     
  7. thingmaker3

    Retired Moderator

    May 16, 2005
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    In our regular safety meetings, we learn that most electricians die from falls. NIOSH statistics indicate 50% of falls from a height of 11 feet (335 cm) are fatal.

    So, even if one is certain of not providing a path for conduction, one should avoid hanging from power lines!
     
  8. mik3

    Senior Member

    Feb 4, 2008
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    Yes! but dont try it!!
     
  9. MIRINGU

    Thread Starter Active Member

    Mar 18, 2007
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    thnx alot 4 u'r answers.
     
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