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Cross sectional area of a protective conductors

MS01
Can someone give me a some advice on if we have a earth electrode system made up of the structural rebar when using the adiabatic equation to size of the bonding conductor comes out at 300mm. MY questions is does each bond need to be this size or can it be made up via a series of smaller bonds that are equal or exceed the 300mm requirement? My opinion is each bond needs to be this size to deal with the fault current as the direction it will flow is unknown. What are peoples thoughts? I cannot see anything in the regs on this.

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    Ah...  Feeling suitably foolish now for not spotting the fact it is HV cables and concentric HV earth.   A NER at the other end it is then, and of course that will make transferred rise of potential at the load end quite 'cold'.  I really should be more careful commenting on HV, my experience is quite skewed towards the non-standard.



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    Ah...  Feeling suitably foolish now for not spotting the fact it is HV cables and concentric HV earth.   A NER at the other end it is then, and of course that will make transferred rise of potential at the load end quite 'cold'.  I really should be more careful commenting on HV, my experience is quite skewed towards the non-standard.



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