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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

    ebee:

    If the structural steel is intended as a cpc or bonding conductor then it must be considered to be a HV conductor but otherwise not I would think




    Thanks Ebee. 


    I am talking about and equipotential bonding conductor bonding some structural steel.


    So if your saying it must be considered HV in your above scenario then BS7671:2018 would seem not to apply as that standard has scope for alternating current voltage sources up to 1000 V AC.


    BS7671:2018 sure does talk about equipotential bonding conductors quite a bit so it must apply, so are you saying BS7671:2018 applies HV conductors ?

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  • Former Community Member
    0 Former Community Member

    ebee:

    If the structural steel is intended as a cpc or bonding conductor then it must be considered to be a HV conductor but otherwise not I would think




    Thanks Ebee. 


    I am talking about and equipotential bonding conductor bonding some structural steel.


    So if your saying it must be considered HV in your above scenario then BS7671:2018 would seem not to apply as that standard has scope for alternating current voltage sources up to 1000 V AC.


    BS7671:2018 sure does talk about equipotential bonding conductors quite a bit so it must apply, so are you saying BS7671:2018 applies HV conductors ?

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