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Earthing arrangement

I have visited a site to Inspect someone else’s ecir and one of the defects is that there is no earth supplied. 
 

The site has about 200 ish sheds that are currently fed off 25mm swa radials then reduced to 6mm swa to each shed but there is no earth through any of the swa now the other elec has gone and said that due to this all would need to pulled up and pulled up. The cable it’s supplied in you can’t earyj the sheath due to only having one copper Center and the sheath as the neutral. Each shed does have a earth stake but all are in bad condition or missing completely. Each shed is privately owned so my argument is that the site is suppling them with a live and neutral and it’s down to the shed owner to supply a earth and 100ma rcd protection am I correct? 

Parents
  • If this was a DNO or independent distribution network it would be OK, as they are allowed  TN-C but it is not OK in consumer side wiring, as it is not TNC-s.

    Unless the cable is in ducting, then the option to make all the sheds TT is not really there.  BS7671 does not recognise a 'neutralled' armour as a means of protection.

    This previous thread may be of interest for reference - it has parallels and turned into a bit of a saga, though an informative one.

    mike

Reply
  • If this was a DNO or independent distribution network it would be OK, as they are allowed  TN-C but it is not OK in consumer side wiring, as it is not TNC-s.

    Unless the cable is in ducting, then the option to make all the sheds TT is not really there.  BS7671 does not recognise a 'neutralled' armour as a means of protection.

    This previous thread may be of interest for reference - it has parallels and turned into a bit of a saga, though an informative one.

    mike

Children
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