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Luas in flood waters

Comments

  • #2
    Captain Chaos
    Registered Users, Registered Users 2 Posts: 11,174 ✭✭✭✭Captain Chaos


    Yes it's perfectly fine otherwise someone would have noticed the massive design flaw before they were even made.

    Every modern building has an earth rod sunk into the ground outside, the ground is saturated all/most of the time in moisture and or water. It's only an earth under fault conditions and even then it will go down.

    When lightening hits a lake, every single fish does not die in it, only a very small area and that's from a few million volts. The Luas is only 750v DC.

    The Luas and Dart and operate in flood waters up to their underhung electric motor and battery levels max.


  • #3
    ClovenHoof
    Banned (with Prison Access) Posts: 1,121 ✭✭✭ClovenHoof


    Yet one more reason why the Luas time and time again proves its worth as a superb public transport system.


  • #4
    L1011
    Registered Users, Registered Users 2 Posts: 71,157 ✭✭✭✭L1011


    Captain Chaos wrote: »
    Every modern building has an earth rod sunk into the ground outside, the ground is saturated all/most of the time in moisture and or water. It's only an earth under fault conditions and even then it will go down.

    The Luas track is the neutral return rather than earth, however. Doesn't change the lack of an issue, though.


  • #5
    cython
    Registered Users, Registered Users 2 Posts: 4,792 ✭✭✭cython


    MrMorooka wrote: »
    http://www.independent.ie/videos/irish-news/watch-luas-navigates-its-way-through-dublins-flash-floods-34801269.html


    Is this safe? There is surely a risk of hitting an obstruction that can't be seen beneath the water and possible derailing. What about the electricity- the current from the overhead line is returning to earth through the tram wheels, so is it safe to have them surrounded by conductive water?
    L1011 wrote: »
    The Luas track is the neutral return rather than earth, however. Doesn't change the lack of an issue, though.

    Not to mention that water is far less conductive than the metal rails, etc. (in fact the conductivity of water is far less than a lot of people imagine, to be quite frank) and electrical current will predominantly follow the path of least resistance to ground, meaning that even if some current/voltage were to reach the water, it would be a very small amount of it.


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