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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:



    The reason I said were getting side tracked is because a disconnected protective conductor has no relevance to my original question. People tend to go off on tangents on this forum quite regularly for some reason. I agree where the design requires a bonding conductor to be connected it should not be disconnected i.e. we should not modify the design. However i'm not going to get into a debate as to if having a single core green/yellow insulated equipotential bonding cable disconnected at one end is hazardous to touch as it has no relevance to my original question.


     




    Why do you think a protective bonding conductor is not a protective conductor? As I said, they may carry Amps of current in a real installation.


    If this is a PME installation, then a main protective bonding conductor also shares Neutral current ...


    I apologise if you don't like my point of view, but that doesn't make it less valid.

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  • 0

    Mike M:



    The reason I said were getting side tracked is because a disconnected protective conductor has no relevance to my original question. People tend to go off on tangents on this forum quite regularly for some reason. I agree where the design requires a bonding conductor to be connected it should not be disconnected i.e. we should not modify the design. However i'm not going to get into a debate as to if having a single core green/yellow insulated equipotential bonding cable disconnected at one end is hazardous to touch as it has no relevance to my original question.


     




    Why do you think a protective bonding conductor is not a protective conductor? As I said, they may carry Amps of current in a real installation.


    If this is a PME installation, then a main protective bonding conductor also shares Neutral current ...


    I apologise if you don't like my point of view, but that doesn't make it less valid.

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