New Consumer Unit Needed?

[Colin33]

I've been asked to do some work on a domestic installation. However, it seems all but the shower and garage supply are not RCD protected. Does anyone know if single module rcbo's are available for this Merlin Gerin board or is it gonna have to be changed?

 

[westward10]

Yes you can get them.

 

[Strima]

Look for Schneider C60H RCBO.

Seems to be a lot of C curve MCBs in there for a domestic board.

 

[westward10]

What is wrong with a Type C in a domestic.

 

[Colin33]

Look for Schneider C60H RCBO.

Seems to be a lot of C curve MCBs in there for a domestic board.

I could only find Schneider ones which don't look like they'll fit (wrong way up) Yes they're C types, think who ever did this was probably more accustomed to industrial work. A metal Cu in a domestic premises before AM3?? Whatever next?

 

[westward10]

You will get Schneider ones to fit that just say they are for a Merlin Multi 9 board.

 

[Strima]

Try and get the Schneider C60H range, the iC60H will fit but not perfectly as they are slightly narrower and a bit taller.

What is wrong with a Type C in a domestic.

Absolutely nothing as long as the disconnection times are met and fault current is sufficient to trip them. I'd much prefer to work on that board than some of the modern options available.

 

[MJPD29]

Yes you can get them, scheider and square d will also fit

 

[westward10]

Square D will not fit that board.

 

[Colin33]

Thanks for your help guys. A quick google and 6 of these RCBO's will cost around £216, which is about what a new loaded CU with 8 rcbo's would cost. But labour will be a lot less of course...

 

[Strima]

I'd be going with using the original board and RCBOs. Good build quality and a lot less hassle to work on.

 

[Deleted member 26818]

What do the two RCDs protect?

 

[Deleted member 26818]

What do the two RCDs protect?

Why does the garage need RCD protection and why do you need 6 RCBOs?

 

[Colin33]

Why does the garage need RCD protection and why do you need 6 RCBOs?

No idea why the garage has an RCD at this end, but it can stay put. I would replace the 6 mcb's in use with rcbos. Only need to work on /add to two circuits but why not do the job properly and make sure all circuits are protected?

 

[Deleted member 26818]

Sorry misunderstood, thought you were saying the shower and garage needed RCD protection.
So your intention is to upgrade the installation to the 17th?

 

[westward10]

No idea why the garage has an RCD at this end, but it can stay put. I would replace the 6 mcb's in use with rcbos. Only need to work on /add to two circuits but why not do the job properly and make sure all circuits are protected?

There is no requirement to add additional rcd protection to circuits you are not working on.

 

[Colin33]

Sorry misunderstood, thought you were saying the shower and garage needed RCD protection.
So your intention is to upgrade the installation to the 17th?

I have to add some sockets and lights, so certainly want to make sure all is rcd protected. As for upgrading the whole installation, it's mainly old coloured wiring and probably missing a cpc on some of the lighting circuits too but a rewire is not an option at this time...

 

[Colin33]

There is no requirement to add additional rcd protection to circuits you are not working on.

As I thought westward, but I'd be happier doing so if the client is happy... it doesn't make any sense to me not to.