In this vid he shows a TNS with a 3 core incomer and the other 3 standard types (TT, TNCS, TNS with sheathing earth connection)
How can we identify the difference between the TNCS and the TNS with a 3 core incomer? Seems to me that both will have an earth coming out from behind the capping on the cut out and therefore make it impossible to tell without pulling the main fuse and taking the cap off.
What you's reckon?