Best practice choice for a CU?

[Monkey Tennis]

Got a call from a customer with tripping problems on their CU... Went out to see what the issue was: decrepit teasmaid causing the tripping so easily recified, however seeing the current installation made me wonder what decision making had gone on by the installer.

The CU has been in for less than 6 months - was a replacement for a fuse board when the client had PV installed this summer - the CU was not a 17th edition as you would expect, but a 'build it yourself' Proteus with all 7 circuits on 'C' curve RCBO's - this is a house, the guy does not use commercial lighting set-ups or have a workshop with tooling needing a high draw on start-up... The cooker whilst wired on 6mm was also on a 32A rather than the 40A you would expect, but that is another matter! Just looking at it, the cost for this set-up alone must be nudging £300 as opposed to £70 for a 17th Edition CU!

Now I realise that the safety aspect of the installation is not in question, but my question to you guys are firstly, why would you NOT put a 17th edition board in with a split loaded RCD's?.. Secondly, Why would you install all RCBO's rather than RCD provision?.. Thirdly Why 'C' curve rather than 'B' in a purely domestic setting?

FYI the installers are NICEIC so not a case of a clueless cowboy!

 

[vernam616]

OP surely can't be a spark

either that or has done one of them "5 week courses"

 

[richy3333]

Why is it people panic as soon as they see a type C on a domestic?

I just panic when I see that Proteus ****e! More nasty than a 50 year old Geordie hooker with an itchy crotch

 

[Pete999]

OP surely can't be a spark

either that or has done one of them "5 week courses"

He is a builder as well.

 

[OhmElectrical]

I'd be honest if I did a change is do that, better be over engineered but that's just my back ground