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Extra Low Voltage (ELV)

Former Community Member
Former Community Member
Guys,


BS7671:2018 is classing cables extra low voltage (ELV) as an operating voltage not exceeding 50Vac or 120V ripple-free dc.


BS7671 goes on to further categorize ELV cables into SELV, PELV, FELV.


For single core green/yellow insulated equipotential bonding cables lets say originating from an earth bar and bonding some structural steel work, are these classed as FELV under BS7671:2018 ?
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  • Former Community Member
    0 Former Community Member

    Sparkingchip:




    Sparkingchip:




    Mike M:

    Guys,


    BS7671:2018 is classing cables extra low voltage (ELV) as an operating voltage not exceeding 50Vac or 120V ripple-free dc.


    BS7671 goes on to further     categorize ELV cables into SELV, PELV, FELV.


    For single core green/yellow insulated equipotential bonding cables lets say originating from an earth bar and bonding some structural steel work, are these classed as FELV under BS7671:2018 ?




    The original question.


     




     

    It states, in bold text to emphasis it, insulated cable and insulated cable has a voltage rating.


    Moving the goal posts to try and score points with Ah! Yes, but comments?


    The insulated cable has to be rated for the highest voltage that is likely to be present, which in a circuit supplied by a FELV transformer will be the voltage of the primary circuit not the secondary circuit; how would even be vaguely possible to consider a main equipotential bonding conductor FELV when it could be presented with the highest voltage within the installation?

     




    Sparkingchip no cares about scoring points. This is a message board on the internet, if someone is caring about scoring points against random people on the internet then they are living a very sad life indeed.


    Curious to know if there a particular clause in BS7671:2018 that  you are saying requiring that an equipotential bonding cable has to be insulated along it's entire length?


    Also curious to know if you are saying that having it a single core green/yellow un-insulated equipotential bonding cable would change the the conculsion that we arrived at ?

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  • Former Community Member
    0 Former Community Member

    Sparkingchip:




    Sparkingchip:




    Mike M:

    Guys,


    BS7671:2018 is classing cables extra low voltage (ELV) as an operating voltage not exceeding 50Vac or 120V ripple-free dc.


    BS7671 goes on to further     categorize ELV cables into SELV, PELV, FELV.


    For single core green/yellow insulated equipotential bonding cables lets say originating from an earth bar and bonding some structural steel work, are these classed as FELV under BS7671:2018 ?




    The original question.


     




     

    It states, in bold text to emphasis it, insulated cable and insulated cable has a voltage rating.


    Moving the goal posts to try and score points with Ah! Yes, but comments?


    The insulated cable has to be rated for the highest voltage that is likely to be present, which in a circuit supplied by a FELV transformer will be the voltage of the primary circuit not the secondary circuit; how would even be vaguely possible to consider a main equipotential bonding conductor FELV when it could be presented with the highest voltage within the installation?

     




    Sparkingchip no cares about scoring points. This is a message board on the internet, if someone is caring about scoring points against random people on the internet then they are living a very sad life indeed.


    Curious to know if there a particular clause in BS7671:2018 that  you are saying requiring that an equipotential bonding cable has to be insulated along it's entire length?


    Also curious to know if you are saying that having it a single core green/yellow un-insulated equipotential bonding cable would change the the conculsion that we arrived at ?

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