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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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    543.3.201 is interesting in requiring insulation of protective conductors up to 6.0mm2 to have an insulation Voltage rating of at least 450/750 V with some exceptions. Metal containment like conduit or trunking need to be electrically continuous, and can be used as protective conductors,  but of course are not electrically insulated to touch, as of course are many metallic structural parts of buildings and other extraneous-conductive-parts.


    Z.
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  • 0
    543.3.201 is interesting in requiring insulation of protective conductors up to 6.0mm2 to have an insulation Voltage rating of at least 450/750 V with some exceptions. Metal containment like conduit or trunking need to be electrically continuous, and can be used as protective conductors,  but of course are not electrically insulated to touch, as of course are many metallic structural parts of buildings and other extraneous-conductive-parts.


    Z.
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