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Bonding of temporary metal fences at a Railway station platform

tattyinengland
HI Chaps


One of the jobs I need to do in the near future is bond some temporary metal fences at a railway station platform.


I would not normally bond metal fences, but I know that this a requirement in this case; metal fences, metal stairways from the platform up to the overhead concourse etc


The overhead train HV lines are probably 5m away from these fences.


Do anyone have any further information for me so that I can understand why we are bonding these fences and what we are trying to achieve? 


I suppose its something to do with the HV side of things..................


Any help would be much appreciated


Kind Regards


Tatty
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  • Former Community Member
    0 Former Community Member

    OLE bonding is common sense in most cases but can become fairly complex in and around stations.

    There is usually a mix of HV and LV sharing a common bond/earth within stations, this can be problematic.

    It can lead to issues with station furniture arcing and there is always the issue of rise of earth and touch potential.

    This should only be done with an AFC bonding design signed off by the CRE as it will need validation to source records more so in around public areas.

    If all that is in place the work is straight forward, a couple of lugs and some 19/3.25 cable makes up your bond,  would recommend you always stick a Ohm meter on it if not already in your ITP ?

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  • Former Community Member
    0 Former Community Member

    OLE bonding is common sense in most cases but can become fairly complex in and around stations.

    There is usually a mix of HV and LV sharing a common bond/earth within stations, this can be problematic.

    It can lead to issues with station furniture arcing and there is always the issue of rise of earth and touch potential.

    This should only be done with an AFC bonding design signed off by the CRE as it will need validation to source records more so in around public areas.

    If all that is in place the work is straight forward, a couple of lugs and some 19/3.25 cable makes up your bond,  would recommend you always stick a Ohm meter on it if not already in your ITP ?

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