- Reaction score
- 706
Hi all,
Just wanted to run this past some people, its for a little job im doing (possibly by moonlight). The property has recently (yesterday) been converted to PME when the DNO changed the cut-out.
It is a farm and ususally around here they will not give PME to farms. The old service was TNS with direct bare earth overhead to the transformer (20 yards away) which came to the MET.
The cut-out started arcing and was replaced by a call out engineer in the evening, the callout engineer has put the bare earth in with neutral and then looped out to the MET.
No problem you may think, however, the supply feeds some switch fuses which feed 2x outbuildings, each with their own metallic services (water and structural steel). These buildings are protected by 300ma type s Rcd's at their origin and one has a 'supplementary' stake, but the supply earth from the 16mm2 T+E's is still connected.
Now, it may be that I should just get the DNO to reconnect the TNS earthing, however assuming that they won't, my plan was to run 2x 10mm G/Y singles alongside the T+E's feeding the buildings, thus continuing the PME, however if I was to do this, would I have to run a 10mm for every bonded service in each of the outbuildings or would one suffice?
Just wanted to run this past some people, its for a little job im doing (possibly by moonlight). The property has recently (yesterday) been converted to PME when the DNO changed the cut-out.
It is a farm and ususally around here they will not give PME to farms. The old service was TNS with direct bare earth overhead to the transformer (20 yards away) which came to the MET.
The cut-out started arcing and was replaced by a call out engineer in the evening, the callout engineer has put the bare earth in with neutral and then looped out to the MET.
No problem you may think, however, the supply feeds some switch fuses which feed 2x outbuildings, each with their own metallic services (water and structural steel). These buildings are protected by 300ma type s Rcd's at their origin and one has a 'supplementary' stake, but the supply earth from the 16mm2 T+E's is still connected.
Now, it may be that I should just get the DNO to reconnect the TNS earthing, however assuming that they won't, my plan was to run 2x 10mm G/Y singles alongside the T+E's feeding the buildings, thus continuing the PME, however if I was to do this, would I have to run a 10mm for every bonded service in each of the outbuildings or would one suffice?