Plastic board above entrance with bs1361 fuses only - no RCD protection. How would you code that?

Vortigern · Oct 5, 2022

What does the DNO equipment look like. For instance does it have any RCCB or even RCD at the supply end. I assume this is a sub-main. How does the supply get to that CU?

zvspark · Oct 5, 2022

Vortigern said:
What does the DNO equipment look like. For instance does it have any RCCB or even RCD at the supply end. I assume this is a sub-main. How does the supply get to that CU?

Vortigern · Oct 5, 2022

So I am guessing there is no ryefield or main plant cupboard that one meter does the flat direct does it? Is that how all the flats are fed each with their own cut-out? Unusual.

davesparks · Oct 5, 2022

Vortigern said:
So I am guessing there is no ryefield or main plant cupboard that one meter does the flat direct does it? Is that how all the flats are fed each with their own cut-out? Unusual.

Not unusual for the age of the installation as in those days the DNO would provide supplies up to each flat.

I live in a 90's built flat where each flat has a DNO installed supply to a cutout in a cupboard by the front door of each flat.

It's only more modern installations where the DNO stop at the incoming supply to the building and a BNO setup is required.

Vortigern · Oct 6, 2022

So it looks like the supply is run in tails to the top floor flat if you are saying that is the supply. In which case it is probably in walls less than 50mm? So an RCD would be needed then for the tails?