What are the mistakes

[Simonslimline]

Been looking at this on the Facebook page save our trade. At first i thought the problem was the reversed line and neutral in the main switch, but apparently that's not it and there is something much more obvious. Other than no RCD protection for 2 of the circuits i am not sure. Can anyone enlighten me on this!

 

[shanky887614]

What about 30 x 2.5mm singles twisted together for neutrel lol

Edit: my mistake didn't realise was concentric.

I would have thought it would have 1 sleeve over all the cores

 

[Simonslimline]

Its split concentric cable, nothing wrong there mate

 

[shanky887614]

Its split concentric cable, nothing wrong there mate

my mistake thought that was fed from breaker to N bar.

Each core is sleeved seperate? Never seen that

 

[Richard Burns]

I would have said there are a few minor problems with this CU but that the major problem was that the polarity is reversed.
Certainly the use of split concentric is not a common choice and it has caused problems with the ordering of the cables in the E and N bars.
Unless it is that the cover is missing:61:!
Other than that I cannot see anything worse than reversed polarity. But I am notoriously poor at identifying errors!

 

[Simonslimline]

my mistake thought that was fed from breaker to N bar.

Each core is sleeved seperate? Never seen that

Split concentric. Straight concentric.

 

[Paul.M]

Reversed polarity as already said above. How many cpc's for two circuits (dont think think the 40A is connected btw)?? I counted 7, 3 x rfc (possibly?) and a lighting circuit. Using the RCBO Neutral as a Neutral terminal! (although it is now the line term!)

Simon, rip it out, test it and start all over again. That will be fun explaining that mess to the customer lol.

 

[Simonslimline]

The picture is hard to tell i reckon. If D Skelton sees this thread he will probably say. He has commented on the FB page but not said what the issue is, not the Line Neutral reverse apparently

 

[Marvo]

The blue neutral in the top of the RCBO means two things to me, firstly the installer is incompetent and secondly the RCBO isn't working assuming it's holding with the power on....although if that's a single phase busbar it might not even be in the circuit at all.

 

[Simonslimline]

Is that not the neutral that comes from the RCBO, it looks like it is terminated in the neutral bar also.

 

[Simonslimline]

Just thinking the cable feeding the board looks like it runs against the pipework!

 

[Marvo]

Is that not the neutral that comes from the RCBO, it looks like it is terminated in the neutral bar also.

Yep, there's a large blue wire that comes from the neutral bar (which is probably live in this case due to reverse polarity at the top of the isolator) and goes to the top of the RCBO instead of the bottom which is where it should be. The black neutrals of the ring final cct will be live and without any OCPD. I'm not sure from the picture if the RCBO is on the busbar at the bottom or not. Either way the entire installation is a ------ handbag.

 

[Richard Burns]

I think it is the quality of the picture that makes it look as if the blue is going to the top of the RCBO, there are the two black RFC Neutrals in the top of the RCBO and the blue neutral passes vertically down behind it.

There is exposed copper on the line connections to the MCB and RCBO, the FE is not in the correct terminal for the RFC, there does appear to be an extra CPC though the bonding? cables do distort the view.
The Use of S/con means the sub main may need RCD protection though it is surface in the picture.
The 40A does seem to have some thicker cables for N and CPC so presumably correct.

That will do for now.

 

[telectrix]

think you'll find that the polarity is correct. schneider CUs have the N closest to the MCB busbar and the busbar is cranked behind the N terminal on the main switch.