Changing garage consumer unit

House CU was changed about 18 months ago so in good order.

I don't have a split load consumer unit. I'm guessing if I did then an RCD would cover the garage but it doesn't unfortunately.

So what exactly have you got? Main switch with no RCD at all? or a single RCD for everything?
Either way, does not comply with BS7671 now or when it was installed.
 
There is an RCBO on the ring main. Its a long story.... not what I asked the electrician to fit but he didn't charge me so I settled with it.
 
I've bought a new flush metal CU and now need to decide whether to call someone in (and perhaps pay for a days labour!!) or do it myself.

As a competent DIYer am I vastly underestimating this job or should it be as it appears which is quite straight forward? How much does it cost to notify the LABC?
 
Ok don't want to cause another "Help with wiring in electric hob tonight" but as this box comes with no instructions I have tried to work it out myself as below. Can someone confirm that I have labelled this correctly?

Also the armoured cable earth just terminates with a nut around the cable onto the current case. This new one is covered in paint so surely I will need to do something other than just tighten the nut?

 
you'll need a "banjo" or a pirahna nut ( sp? )..
have a look in the wiki or stickies, BAS has put up a post about terminating armour cables..

and yes, your drawing looks right..

As a competent DIYer am I vastly underestimating this job or should it be as it appears which is quite straight forward? How much does it cost to notify the LABC?

yes you are underestimating it..

while the physical act of installing it isn't that difficult, you don't have the equipment to test it or the technical knowledge of the regulations to ensure you are doing it safely and correctly..
 
How much does it cost to notify the LABC?

Depends on your area. But it would be about the same amount it would cost you to have an electrician fit and test that consumer unit for you.

Around here, that's about £170 + VAT for the building control fees. It will cost an approved electrician two or three quid to notify building control, giving you £167 to spend on his labour! And you will still get a certificate of compliance and a test certificate. And, most probably, some sort of warranty. All you have to do is make the tea.
 

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