Yes you can fit second consumer unit common when supplying showers and sheds you may have to use two lighting circuits as most light fitting need fusing to 6 amp. There are three ways to connect with henley block or from existing consumer unit and latter with approved cable or twin and earth. Routes are very important as you may need to have RCD at supply end if not approved cable etc. There is a lot involved. See 17th Edition links and also Part P links I am sure once read you will have more questions.
As a part p registered spark I would recommend using henley blocks and putting your supply tails into these and then new tails from here to both consumer units. a small 6 way split consumer with rcds would do and give you compliance with current 17th edition qiring regs.Also dont forget to take a main earth from one consumer unit to the other. Dont forget this is part p work and notifiable and will then need to be tested and certified
Hi, you can add another consumer unit but I am led to believe that the old practice of cutting into the tails with Henley blocks is no longer good enough as reg. 537.1.4 implies a single point of isolation is required for each installation. I now use 100A Double Pole isolator as fitted to consumer units in an enclosure with meter tails in one end and consumer units tails out the other.
I have been using up my stock of sw. taken out when fitting RCD's in the past, enclosures cost from £2-£5 & sw about the same so not much more than cost of blocks
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