Can anyone help.earthing system

[Zahid Nawab]

Hello all, can anyone clarify what this requires on a dno supply that needs to be upgraded. In regards to the earthing system, the application has a tick box which I'm slightly confused about on what it required, it's the part on steel framed building and why this is done

 

[westward10]

I believe they are asking if the building will have a single DNO supply or multiple within the same building. If multiple supplies they are likely to consider an alternative means of earthing such as SNE (Separate Neutral Earth).