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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
  • Former Community Member
    0 Former Community Member

    Sounds like it is all wired in straight concentric, not SWA. That's not considered OK for direct burial under BS7671 so totally independent of the earthing I can see why the electrician wants to condemn it. The problem is that if someone puts a spade or anything else through the cable it hits the concentric neutral, not earth, and neutral is considered to be a live conductor.

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  • Former Community Member
    0 Former Community Member

    Sounds like it is all wired in straight concentric, not SWA. That's not considered OK for direct burial under BS7671 so totally independent of the earthing I can see why the electrician wants to condemn it. The problem is that if someone puts a spade or anything else through the cable it hits the concentric neutral, not earth, and neutral is considered to be a live conductor.

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