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:

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?