TNCS 6mm main earth - EICR

Just wondering what peoples first thoughts are on a 6mm main earth. 0.27ze, TNCS. 80A 1361 main fuse.

A rough calculation (0.3s disconnection time with an earth fault current of around 850A) suggests it'll pass the adiabatic with ease.


So that only really leaves PME diverted N current considerations. If there are no installation level extraneous-conductive-parts (or a 2nd DNO supply) then it's not really going to be a problem, if there are then if there's no sign of any thermal damage to the 6mm² then it's probably acceptable (but below current standards).

Iv'e tried doing a search on here but it did not come up with any results. (Maybe user error!). I'm sure this subject would have come up before.

Ah, it's probably in the old Forum... ?


  - Andy.

Just wondering what peoples first thoughts are on a 6mm main earth. 0.27ze, TNCS. 80A 1361 main fuse.

A rough calculation (0.3s disconnection time with an earth fault current of around 850A) suggests it'll pass the adiabatic with ease.


So that only really leaves PME diverted N current considerations. If there are no installation level extraneous-conductive-parts (or a 2nd DNO supply) then it's not really going to be a problem, if there are then if there's no sign of any thermal damage to the 6mm² then it's probably acceptable (but below current standards).

Iv'e tried doing a search on here but it did not come up with any results. (Maybe user error!). I'm sure this subject would have come up before.

Ah, it's probably in the old Forum... ?


  - Andy.