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Steel Clad Building and High Voltage Overhead Cables.

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There is a modern sheet steel clad building nearby. It has what appears to be plastic covered steel sheets as exterior walls. It is used as a Scout Hut and can probably accommodate about 80 people for events. Running overhead are three high Voltage cables that feed local transformers, including the scout hut transformer which is on a pole nearby. The scout hut has two earth electrodes which connect to a part of the building and earth it. Although they are quite close together so may not really count as two in function.


Theoretically what would happen if one of the H.V. overhead cables came adrift and fell onto the roof of the building regarding risks?


This is a theoretical question relating to a real building but with a serious intention.


Thanks,


Z.


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  • 0
    Hello WB,

                         I have no specific theory as to a likely cause of a 11kV cable coming down and falling onto the metal roof of the scout hut but it may happen. We discussed on this forum in the past a cable that fell so low from a rail bridge in the U.K. that it was caught by a passing train and injured someone on a train platform. That drooping was caused by slowly degrading plastic cable ties, affected by the sun.


    Do you remember the Michel Fish denial of a storm in 1987? That weather man said that no such storm was due, yet it came. We had 90 mile per hour winds in the south of England.

    https://www.youtube.com/watch?v=FA6yj8ewOu0


    Then there is the possibility of material fatigue of the cable or supports, or as you suggest a vehicle collision with the supporting cable pole.


    Personally I would not have constructed a building, metal or otherwise, directly under 11kV electric cables.


    Z.




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  • 0
    Hello WB,

                         I have no specific theory as to a likely cause of a 11kV cable coming down and falling onto the metal roof of the scout hut but it may happen. We discussed on this forum in the past a cable that fell so low from a rail bridge in the U.K. that it was caught by a passing train and injured someone on a train platform. That drooping was caused by slowly degrading plastic cable ties, affected by the sun.


    Do you remember the Michel Fish denial of a storm in 1987? That weather man said that no such storm was due, yet it came. We had 90 mile per hour winds in the south of England.

    https://www.youtube.com/watch?v=FA6yj8ewOu0


    Then there is the possibility of material fatigue of the cable or supports, or as you suggest a vehicle collision with the supporting cable pole.


    Personally I would not have constructed a building, metal or otherwise, directly under 11kV electric cables.


    Z.




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