On 15/12/2020 19:43, Andy Burns wrote:
The Natural Philosopher wrote:

Andy Burns wrote:

The Natural Philosopher wrote:

ARW wrote:

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

No RCD/RCBOÂ* has a 'functional earth fly lead'.

The white lead here ...

...is not part of the trip function. No idea what its for, perhaps to
earth something in the switch...

https://www.youtube.com/watch?v=aCf2alTZkLU
Blimey. so it's there to detect neutral earth current for if the neutral
is disconnected.


--
Religion is regarded by the common people as true, by the wise as
foolish, and by the rulers as useful.

(Seneca the Younger, 65 AD)

On 16/12/2020 02:48, The Natural Philosopher wrote:
On 15/12/2020 19:43, Andy Burns wrote:
The Natural Philosopher wrote:

Andy Burns wrote:

The Natural Philosopher wrote:

ARW wrote:

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

No RCD/RCBOÂ* has a 'functional earth fly lead'.

The white lead here ...

...is not part of the trip function. No idea what its for, perhaps to
earth something in the switch...

https://www.youtube.com/watch?v=aCf2alTZkLU
Blimey. so it's there to detect neutral earth current for if the neutral
is disconnected.



And if the functional earth is not made/drops off/doesn't go to earth
the RCBO 'may not work as normal'. Hmm. I think you have a lower
probability of killing yourself with the non earthed type!

On 16/12/2020 07:37, Andy Bennet wrote:
On 16/12/2020 02:48, The Natural Philosopher wrote:
On 15/12/2020 19:43, Andy Burns wrote:
The Natural Philosopher wrote:

Andy Burns wrote:

The Natural Philosopher wrote:

ARW wrote:

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

No RCD/RCBOÂ* has a 'functional earth fly lead'.

The white lead here ...

...is not part of the trip function. No idea what its for, perhaps
to earth something in the switch...

https://www.youtube.com/watch?v=aCf2alTZkLU
Blimey. so it's there to detect neutral earth current for if the
neutral is disconnected.



And if the functional earth is not made/drops off/doesn't go to earth
the RCBO 'may not work as normal'. Hmm. I think you have a lower
probability of killing yourself with the non earthed type!

THAT is just bull****. Designed to get you to use their crap




--
€œThe ultimate result of shielding men from the effects of folly is to
fill the world with fools.€�

Herbert Spencer

On 16/12/2020 02:48, The Natural Philosopher wrote:
On 15/12/2020 19:43, Andy Burns wrote:
The Natural Philosopher wrote:

Andy Burns wrote:

The Natural Philosopher wrote:

ARW wrote:

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

No RCD/RCBOÂ* has a 'functional earth fly lead'.

The white lead here ...

...is not part of the trip function. No idea what its for, perhaps to
earth something in the switch...

https://www.youtube.com/watch?v=aCf2alTZkLU

Blimey. so it's there to detect neutral earth current for if the neutral
is disconnected.

No it's there to detect Live to earth leakage when there is no neutral
connection, something a regular RCD may not be able to do.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

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 secondÂ* 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

Andy Burns wrote in news:i40pbeF758iU1
@mid.individual.net:

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 secondÂ* 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


Seems Screwfix is becoming quite the specialist electrical supplier with
33 of their 105 RCBOs now 3ph and a choice of 3 makes on offer.

The Chint is both 3ph & 1 pole, neat space saving trick.

They're doing pre-stripped (as opposed to striped) earth wire too, that
will save some work.

More seriously, it's good to see that 3ph RCBOs are becoming available
(Hager etc), a pal had a holiday cottages setup with swimming pool and he
had a hell of a job tracking down some nuisance trips through all of the
water based elements running off single RCDs. I wanted to suggest
converting his board to 3ph RCBOs but I couldn't find any (this was a
while ago).

Peter Burke wrote:

it's good to see that 3ph RCBOs are becoming available (Hager etc)

The schneider 3P+N RCD/MCB combo is 7 modules wide though.

Andy Burns wrote in news:i41c4uFapdhU1
@mid.individual.net:

Peter Burke wrote:

it's good to see that 3ph RCBOs are becoming available (Hager etc)

The schneider 3P+N RCD/MCB combo is 7 modules wide though.

Ouch! Sounds like a bit of a bodge.

Hager & Eaton look to be 4 modules wide so more sensible.

Haven't bothered to look at the specs in detail as no 3ph here and have
rather lost touch with Mr Pool.

Peter Burke wrote:

Andy Burns wrote:

The schneider 3P+N RCD/MCB combo is 7 modules wide though.

Ouch! Sounds like a bit of a bodge.

https://youtu.be/e54ud_CIvEU?t=355

Andy Burns wrote in news:i41g77FbjeeU1
@mid.individual.net:

Peter Burke wrote:

Andy Burns wrote:

The schneider 3P+N RCD/MCB combo is 7 modules wide though.

Ouch! Sounds like a bit of a bodge.

https://youtu.be/e54ud_CIvEU?t=355

That looks horrible. The distribution boards will be twice the size.

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 secondÂ* 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

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

--
Adam

On 17/12/2020 16:44, Andy Burns wrote:
Peter Burke wrote:

Andy Burns wrote:

The schneider 3P+N RCD/MCB combo is 7 modules wide though.

Ouch! Sounds like a bit of a bodge.

https://youtu.be/e54ud_CIvEU?t=355

It's the Chuckle Brothers

--
Adam

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".

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

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