T
The General
Evening all.
Bit of an odd one this and I just wanted to run it past bigger brains than mine to make sure I'm not missing something obvious.
A brand new PME supply is being brought across to a field which has got 3 outbuildings, all of which need lights and a couple of sockets.
The supply comes to the first building, and is going to run in armoured out to the next and then onto the 3rd building. Each building will have it's own mini 'garage' C/Unit with RCD etc. In the third building there is a solitary sink which is the only water supply for the whole place and the only metal incoming service pipe.
My initial thought was to bond from the MET at the 3rd C/U in the building with the sink, but I've suddenly just had a panic that I ought to be taking the 10mm cable all the way back to the original MET at the 1st board where the supply comes in.
Then I started doubting myself even more - the incoming supply to the 3rd building is 6mm 3-core armoured on a 32A breaker - it seems mental to have a water bond in 10mm when the main earthing conductor for that building is only 6mm?
So, my question is:
10mm water bond back to main MET on 1st board?
10mm water bond to MET on 3rd board?
6mm water bond to MET on 3rd board?
any other options!?!?
Hope that makes sense - it's been a long day and my head hurts - the beer hasn't kicked in yet either ;-)
Thanks for your thoughts!
Bit of an odd one this and I just wanted to run it past bigger brains than mine to make sure I'm not missing something obvious.
A brand new PME supply is being brought across to a field which has got 3 outbuildings, all of which need lights and a couple of sockets.
The supply comes to the first building, and is going to run in armoured out to the next and then onto the 3rd building. Each building will have it's own mini 'garage' C/Unit with RCD etc. In the third building there is a solitary sink which is the only water supply for the whole place and the only metal incoming service pipe.
My initial thought was to bond from the MET at the 3rd C/U in the building with the sink, but I've suddenly just had a panic that I ought to be taking the 10mm cable all the way back to the original MET at the 1st board where the supply comes in.
Then I started doubting myself even more - the incoming supply to the 3rd building is 6mm 3-core armoured on a 32A breaker - it seems mental to have a water bond in 10mm when the main earthing conductor for that building is only 6mm?
So, my question is:
10mm water bond back to main MET on 1st board?
10mm water bond to MET on 3rd board?
6mm water bond to MET on 3rd board?
any other options!?!?
Hope that makes sense - it's been a long day and my head hurts - the beer hasn't kicked in yet either ;-)
Thanks for your thoughts!