Sub main & bonding conductors

[cliffed]

Installing Swa 35MM 4 c,to new school block.
This supply will come of a MPB,nearby,to me the supply to this MPB does not comply.
Concern once again are the size of the bonding conductors realative to the the Main REC supply.
The drawing we have,have no input on this, it’s a Tncs system,& earth bonding will be required.
In a nut shell, even @ this moment the supply does not comply,in my opinion.
Any thoughts,on this,once again Swa being used as cpc & bonding conductor.

 

[ImpededLoop]

Best to write to the designer to highlight your concerns and ask for comments.

Also state that they will be designated as the "designer" on the EIC when you issue it.

 

[westward10]

The 35mm is inadequate to support main protective bonding. The minimum size for 10mm bonding would be 50mm four core.

 

[cliffed]

The 35mm is inadequate to support main protective bonding. The minimum size for 10mm bonding would be 50mm four core.

The main bonding cable would be installed separately, the issue is the MPB

Best to write to the designer to highlight your concerns and ask for comments.

Also state that they will be designated as the "designer" on the EIC when you issue it.

on the case tomorrow

 

[snowhead]

Whoever designed the new cable probably did so from a drawing, not a site visit, so would be unaware of the actual existing.