UK Swa as main earth ?!?

[DJP1997]

If it becomes TT the distribution cpc is not relevant.

This was why I was thinking TT

This is what Ive got supply end straight into the swa. Earth is 16mm
View attachment 118019

 

[DJP1997]

And this

 

[westward10]

Judging by the supply cable I doubt your main protective bonds need to be above 10.0 and if that cable is 120.0 it's armour will support 10.0.

 

[timhoward]

If it becomes TT the distribution cpc is not relevant.

Obviously it's electrically irrelevant and I'm not trying to pick an argument that flies in the face of common sense....

Thing is, I've never found anything in the regs to specifically say how to size bonding in a separate building that becomes TT at point of entry.
541.1.1 seems to make no distinction for TT, just PME or non-PME, and the line about separate buildings.
Is there another section somewhere that is relevant ? Or is it just one for common sense?
Thanks.

 

[westward10]

You would treat it as a TT installation.