What needs to change?

[Loosefix]

 

[binky]

What are you trying to do?

 

[Loosefix]

What are you trying to do?

Have a sub panel/CU upstairs fed with 16mm - it has a it’s own main switch and everything is RCD protected.

At the moment it’s supply comes out of the main CU on a 32amp
MCB - does this need amending? Does it need another main switch at source?

 

[binky]

Have a sub panel/CU upstairs fed with 16mm - it has a it’s own main switch and everything is RCD protected.

At the moment it’s supply comes out of the main CU on a 32amp
MCB - does this need amending? Does it need another main switch at source?

The source board will already have a main switch.

I take it this has been in place for sometime, and from what you describe is a perfectly acceptable set up. So that begs the question why are you concerned about it?

 

[Murdoch]

Unless you can confirm the installation method of the submain cable it may need RCD protection ...... then you'll have RCD's in series

As above why are you asking this?

 

[Fleeting]

The chances of selectively being achieved are all but zero.