Fitting consumer unit vertically

[EFLImpudence]

The cable can go to one of the RCBOs with the busbar.

 

[ban-all-sheds]

Yes - but, as I've just written, if one does away with the main switch (and uses that space for RCBOs), then how does one connect the incoming L to the L-busbar

 

[JohnW2]

The cable can go to one of the RCBOs with the busbar.

Yes, I suppose so ... or one of the techniques illustrated by BAS.

As a matter of interest, have you often seen a domestic CU without a Main Switch (or RCD incomer)?

Kind Regards, John

 

[EFLImpudence]

No, I haven't but I can't see that it matters.

A main switch directly below would be obvious, wouldn't it? Especially for two small units, one above the other.

 

[JohnW2]

No, I haven't but I can't see that it matters.

It doesn't matter at all. As I said, I was just interested in know whether it was often done.

A main switch directly below would be obvious, wouldn't it? Especially for two small units, one above the other.

Very much so. You seem to have gained the impression that I have a problem with a CU not having an 'internal' Main Switch / Isolator, but that isn't the case - provided there is a nearby isolator.

Kind Regards, John

 

[EFLImpudence]

but that isn't the case - provided there is a nearby isolator.

Oh, alright, sorry. It did seem like that.

People don't usually question what they agree with.

 

[JohnW2]

Oh, alright, sorry. It did seem like that. People don't usually question what they agree with.

The only thing I questioned was the practicalities of connecting the incoming supply to a CU which had no 'incomer device' (Main Switch or RCD) - but you and BAS have answered that.

Kind Regards, John

 

[John D v2.0]

Oh, alright, sorry. It did seem like that.

People don't usually question what they agree with.

You should know @JohnW2 well enough by now!always learning

 

[JohnW2]

You should know @JohnW2 well enough by now!always learning

As I wrote to EFLI, on this occasion I did not "question something I agreed with". However, given that I very much acknowledge my fallibility and recognise that 'opinions vary', I do sometimes "play Devil's Advocate" - by presenting a view with which I don't (or don't necessarily) agree in order that discussion and debate can happen.

Kind Regards, John

 

[ban-all-sheds]

The cable can go to one of the RCBOs with the busbar.

Are the terminals designed to be used with both?

 

[EFLImpudence]

Are they not?

As they are used with either, separately, I do not see the difference with both at once.

 

[ban-all-sheds]

Being designed to use either one on its own does not necessarily mean that it can use both at the same time.

 

[EFLImpudence]

Being designed to use either one on its own does not necessarily mean that it can't use both at the same time.

I can see no reason why it cannot.

 

[JohnW2]

Being designed to use either one on its own does not necessarily mean that it can't use both at the same time. I can see no reason why it cannot.

Indeed. It's very often done to feed a second RCD, isn't it - in other words, it probably happens in virtually all 'dual RCD' CUs (including the several in my house).

It's probably less ideal to have two (different) things in same terminal than to have just one. However, when those two things are a busbar and a cable conductor, I can't see that there would be a particular problem, particularly with a 'cage' type of terminal.

Kind Regards, John

 

[ban-all-sheds]

Being designed to use either one on its own does not necessarily mean that it can't use both at the same time.

Indeed not.

But "not necessarily can't", and no being able to see a reason why not are simply not an acceptable alternative to a definitive statement from the maker.

They just are not.