neutrals in CU

[studentspark]

Hi

Playing about with my practice board and got my self thinking about neutral setups.

Is it better to take the neutral to the neutral bar and feed off that or can you take it from the out going terminal of the main switch.

Also could you convert a split load in to a single RCD board by linking the two neutral bars, would that be OK?

done a little piccy to explain myself

View media item 20620

 

[kevindgas]

Also could you convert a split load in to a single RCD board by linking the two neutral bars, would that be OK?


View media item 20620

why would you want to? the whole idea is to make things safer how would doing this achieve that?

 

[electronicsuk]

the neutral to the neutral bar and feed off that or can you take it from the out going terminal of the main switch.

Of course it's better to use the neutral bar. You wouldn't be able to get all your neutrals into the single terminal on the main isolator anyway - certainly not securely.

Also could you convert a split load in to a single RCD board by linking the two neutral bars, would that be OK?

If you really wanted to...

However, neither of your pictures make ANY sense at all.

 

[kevindgas]

However, neither of your pictures make ANY sense at all.

glad you said that i thought it was me being thick!

 

[electronicsuk]

However, neither of your pictures make ANY sense at all.

glad you said that i thought it was me being thick!

A little from column A, and little from column B!

 

[EdwardCurrent]

Hi.
You must consider isolation here.
C/U's have pre-made leads 'crimped' in order to work correctly that fit into Mainswitches/RCD's with a 25mm capacity.
Throw a few rcbo's and a circuit that doesn't need RCD protection into the equation too ?
Keep at it, it will be worth it .

Regards
ED

Yes, best get the books out again.

 

[studentspark]

The picture does not make ANY sense, Oh, could you please explain

 

[studentspark]

Hang on I think I got it the neutral has both feed from main switch and rcd

 

[studentspark]

View media item 20623
That better

 

[skenk]

From Hager technical in response to a question about converting dual RCD to 'high integrity':

"An extra neutral link can be supplied from the load side of the
main switch to feed the extra bar or as you say run the existing neutrals
from this bar to the supply side of each RCCB.
There is no preferred way as long as each section has it's own
neutral terminal bar. "

 

[kevindgas]

Hang on I think I got it the neutral has both feed from main switch and rcd

yep!!

 

[kevindgas]

View media item 20623
That better

an improvement, but still fail to see why you would want to downgrade a CU.

 

[londonboy]

There may be some occasions where one RCD could be suitable/compliant, as long as studentspark knows these rare situations, and that generally at least two RCDs are most common in domestic at the moment.

 

[studentspark]

This is my thinking

Split load board, some circuits RCD protected some not.
Link out the neutral bar so all circuits RCD protected. Not an ideal situation but is it better to be RCD protected or not?

 

[disinfo]

This is my thinking

Split load board, some circuits RCD protected some not.
Link out the neutral bar so all circuits RCD protected. Not an ideal situation but is it better to be RCD protected or not?

I'd sooner add RCBO's to the non RCD protected side, depending on what the circuits were supplying.