RCD or RCBO consumer unit

[Fazz711]

Hi .

I normally do industrial electric work.
Usually on Schneider and Merlin Gerin boards

I am looking at fitting a new consumer unit at home and seem to be getting two versions of which board would suit best.

Either a dule RCD board with MCBs
Or A board with all RCBOs.

Which would be best and why?

 

[newfutile]

Rcbo board anytime,keeps faults separate and you don't need to worry about the 9ma leakage current limit on any 1 rcd. I only fit full rcbo boards with spd for single phase

 

[Fazz711]

Rcbo board anytime,keeps faults separate and you don't need to worry about the 9ma leakage current limit on any 1 rcd. I only fit full rcbo boards with spd for single phase

Thanks.
Any recommendations on type.

I usually fit Schneider stuff and I can find one with the right RCBOs I need but will consider other if any are recommend as better.

 

[Tom256]

Thanks.
Any recommendations on type.

I usually fit Schneider stuff and I can find one with the right RCBOs I need but will consider other if any are recommend as better.

What do you mean by 'better'

 

[littlespark]

Hager or Fusebox….. or whatever I get the best price on.


As explained above, all RCBO gives better separation of circuits the dual RCD, losing only one circuit instead of a bunch of them.
Possible nuisance trips are harder to diagnose.

Only downside is the increased initial cost.


What’s the physical location like for space to fit in a new board?
All mine seem to include destroying some well built cupboard surround,

 

[Fazz711]

Hager or Fusebox….. or whatever I get the best price on.


As explained above, all RCBO gives better separation of circuits the dual RCD, losing only one circuit instead of a bunch of them.
Possible nuisance trips are harder to diagnose.

Only downside is the increased initial cost.


What’s the physical location like for space to fit in a new board?
All mine seem to include destroying some well built cupboard surround,

It lives above kitchen cupboard.
I was going to box it in when I fitted the kitchen but it didn't happen.
Glad now as plenty of room.

 

[brianmoooore]

RCBOs can help with the space problem. Going from dual RCD to RCBOs releases four modules on the DIN rail, which may allow you to go down a size in enclosure.

 

[littlespark]

It lives above kitchen cupboard.
I was going to box it in when I fitted the kitchen but it didn't happen.
Glad now as plenty of room.

That doesnt sound like its easily accessible for swapping out.

Be prepared to take the cupboard down to give you some more working space.

 

[Fazz711]

This is the space

 

[Fazz711]

RCBOs can help with the space problem. Going from dual RCD to RCBOs releases four modules on the DIN rail, which may allow you to go down a size in enclosure.

I have eight RCDs and only use seven.

The Schneider one I think is 12 and comes with eight RCBOs and will cover what I need

 

[Fazz711]

What do you mean by 'better'

Maybe easier to fit or cheaper more available parts
Better quality.

 

[brianmoooore]

You don't appear to be limited in space horizontally, as is often the case, so my comment isn't really applicable here.
Is that meter as your supplier left it?