what code for a under sized armouring as a main bonding conductor

[R4BOE]

hi

what code do you think should be atributed to a 2 core SWA cable used as part of a Main bonding conductor the steel Csa equivelent required is 64mm sq and the current 2 core 25mm sq swa is a BS 6346 with a steel csa of 60mm sq

the above info on the required CSA is from the ESC technial manual

the installatrion is mid - late 1980's TNS copper equivelent required is 10mm sq

 

[SimpleSimon]

hi

what code do you think should be atributed to a 2 core SWA cable used as part of a Main bonding conductor the steel Csa equivelent required is 64mm sq and the current 2 core 25mm sq swa is a BS 6346 with a steel csa of 60mm sq

the above info on the required CSA is from the ESC technial manual

the installatrion is mid - late 1980's TNS copper equivelent required is 10mm sq

Whats it bonded to?

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[R4BOE]

Water service and incoming oil pipe for a domestic type boiler

 

[SimpleSimon]

So straight from the armouring is a fly lead of some sort? What size is this? Have you.done an r2 test to see if your getting 0.05? Im swaying towards a C3.

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[Richard Burns]

Undersized bonding conductor with no signs of damage, overheating etc, correctly labelled terminations, then a C3.

 

[R4BOE]

c3 thats what i was thinking


cheers

 

[tony mc]

If this is for a EICR I would be looking at what size earthing conductor is needed for the premises by use of the adiabatic I would then only code it if the main bonding conductor was under sized as with it being TNS you might find that what is installed is sufficient IMO !

 

[Deleted member 26818]

No code, as it's not undersized.
The requirement for copper equivalence for bonding conductors, only applies to TN-C-S.