On 17/12/2020 18:47:11, charles wrote:
In article ,
ARW wrote:
On 17/12/2020 10:14, Andy Burns wrote:
ARW wrote:

Andy Burns wrote:

PeterC wrote:

What's the point of big RCBOs?

I think the first generation RCBOs were taller, then they managed to
shrink them to MCB size in second generation, so I don't think
there's any 'point' as such to the tall ones.

The small ones often do not have the functional earth fly lead.

Apparently Chint can squeeze a 3-ph RCBO into a single-width module ...

https://screwfix.com/c/c/c/cat7230024#&brand=chint

:-)))))))))))))))))

When you click on the picture for detailed description, it says "single
pole".

It says
No. of Phases 3-Phase
Number of Poles Single Pole

One might be forgiven, if they didn't see the photo, that it was for a
3-phase supply, where you might expect 3 single pole contacts.

It's a term not confined to Screwfix:

https://www.electricaldirect.co.uk/p...-type-c-862054