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UK Power Networks, hot working

Former Community Member
Former Community Member
Evening guys


Not sure if I’ve asked this before on this forum, can’t find how to search my posts. 


When UK Power Networks are replacing an underground service head cable, do they work on it live and if so how, I think saw a video on how they do it, but can’t remember.  Any help greatly appreciated.  


Dave
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  • 0

    So I take it they cut/connect Line & neutral cables separately to avoid them from touching?



    I watched (what was then) YEDL replace a 3-phase cut-out live. Basic procedure seemed to be disconnect one wire, then put a temporary sleeve over it, before moving onto the next. Reconnect in reverse as it were, so at any point in time there's at most one bare live end.


    When splicing in to a live main, I think neutral is never cut (lost N is a bad thing on any 3-phase system, let alone a broken PEN) - they even have designs of cables that have a little extra length in the "armour" (N/PEN) wires so there's enough slacks to they can be pulled away from the cores without cutting them.


       - Andy.
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  • 0

    So I take it they cut/connect Line & neutral cables separately to avoid them from touching?



    I watched (what was then) YEDL replace a 3-phase cut-out live. Basic procedure seemed to be disconnect one wire, then put a temporary sleeve over it, before moving onto the next. Reconnect in reverse as it were, so at any point in time there's at most one bare live end.


    When splicing in to a live main, I think neutral is never cut (lost N is a bad thing on any 3-phase system, let alone a broken PEN) - they even have designs of cables that have a little extra length in the "armour" (N/PEN) wires so there's enough slacks to they can be pulled away from the cores without cutting them.


       - Andy.
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