- Aug 13, 2022
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- If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
- United Kingdom
- What type of forum member are you?
- Electrical Engineer (Qualified)
I’m installing 20KW of Solar on my Barn roof,
The barn is fed from a 3 phase supply originating at the house which is 80 meters away.
I’ll be installing some 35mm 4 core to minimise the losses to <1% volt drop between the barn and the point of supply located at the house.
The Earthing at the Cut Out at the house is TNC-S fed from a PME.
In The Barn is a consumer unit, 3 phase stuff, Lathe, Welding, car lift and some single phase consumers.
Located at the house is another 3 Phase Board, with single phases feeding the House, the Annex (A small bungalow) and some Lighting for stables and outdoor sockets
I’m using 2x Single phase invertors due to the loads being unbalanced and there being only two main consumers, House and Annex.
My question is what earthing arrangement should I use at the Barn, it’s 80 Meters from the point of supply, is a consumer, but when the Solar Panels are working it’s a generator?
The barn is fed from a 3 phase supply originating at the house which is 80 meters away.
I’ll be installing some 35mm 4 core to minimise the losses to <1% volt drop between the barn and the point of supply located at the house.
The Earthing at the Cut Out at the house is TNC-S fed from a PME.
In The Barn is a consumer unit, 3 phase stuff, Lathe, Welding, car lift and some single phase consumers.
Located at the house is another 3 Phase Board, with single phases feeding the House, the Annex (A small bungalow) and some Lighting for stables and outdoor sockets
I’m using 2x Single phase invertors due to the loads being unbalanced and there being only two main consumers, House and Annex.
My question is what earthing arrangement should I use at the Barn, it’s 80 Meters from the point of supply, is a consumer, but when the Solar Panels are working it’s a generator?
