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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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    Mike M:




    Sparkingchip:

    Mike M (aka Jim?) I am throwing the towel in on this one. Reading the whole topic again from the start I am sure that there were posts that have been deleted and there are answers and comments to points raised in posts that no longer exist.


     




    Andy I have not deleted anybody's answers. I posted one of my comments twice and removed the duplication as it came in under a different account name but I have not deleted anybody's answers. The content has not been modified. I'm not sure there was anything to resolve in the first place the thread had already been answered sufficiently and was marked as closed/answered. If you have an issue with the conclusion that was made then detail why if not then I accept your towel.


     




     

    I read a comment that it is possible to have earthed SELV, which is not possible as it ceases to be SELV and becomes FELV.


    The original post asked if a main equipotential bonding conductor between extraneous steel work and the main earth terminal can be classified as FELV without any apparent comprehension of what FELV is.


    So hence the need to go back to basics. I am questioning if you are actually located outside of the UK and not used to the terms used in BS7671?


    Andy Betteridge 


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  • 0

    Mike M:




    Sparkingchip:

    Mike M (aka Jim?) I am throwing the towel in on this one. Reading the whole topic again from the start I am sure that there were posts that have been deleted and there are answers and comments to points raised in posts that no longer exist.


     




    Andy I have not deleted anybody's answers. I posted one of my comments twice and removed the duplication as it came in under a different account name but I have not deleted anybody's answers. The content has not been modified. I'm not sure there was anything to resolve in the first place the thread had already been answered sufficiently and was marked as closed/answered. If you have an issue with the conclusion that was made then detail why if not then I accept your towel.


     




     

    I read a comment that it is possible to have earthed SELV, which is not possible as it ceases to be SELV and becomes FELV.


    The original post asked if a main equipotential bonding conductor between extraneous steel work and the main earth terminal can be classified as FELV without any apparent comprehension of what FELV is.


    So hence the need to go back to basics. I am questioning if you are actually located outside of the UK and not used to the terms used in BS7671?


    Andy Betteridge 


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