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Do-It-Yourself (DIY) Question & Answer Forum
Running two mini consumer units from main one, as sub-circuits
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<blockquote data-quote="sandypants" data-source="post: 423933" data-attributes="member: 27961"><p>Hi,</p><p></p><p>Brand new to the forum, just after some expert advice/opinions:</p><p></p><p>Amongst other circuits, I have a radial circuit installed on my main home CU: 6mm^2 cable on a 32A MCB (with RCD). This was installed to supply power to an outdoor brick building, and then onwards to a few extra areas beyond.</p><p></p><p>I'd like to put a consumer unit on this radial circuit (in the brick outhouse) - and then another consumer unit beyond that (in a 18m distant shed) to distribute the circuits and provide protection. Unsure whether I am overloading my original domestic 32A radial circuit by having a successive 32A circuit from the outhouse CU supplying the next CU (again, as a 6mm^2 radial). In addition to the 2nd radial described, there will be a 16A ring main for plug sockets, a 3A lighting circuit and a 20A ring main (for washer/dryer/deep freeze) in the brick outhouse.</p><p></p><p>I wish the original radial circuit had been a 10mm^2 64A circuit - but it's too late now.</p><p></p><p>Please see the <a href="https://www.dropbox.com/s/0mzyew8goaqv6kf/Wiring.jpg?dl=0" target="_blank">Link</a> for a diagram of what I am intending (I doubt the dropbox link will work but I'm trying anyway, also an alternative <a href="https://drive.google.com/file/d/0B_93kNX8YUsOV3dUam1rMnlZTEU/view?usp=sharing" target="_blank">Link</a>). Is this generally sound? Or should circuit 1F be a lower rating? I would post an image of the diagram but I'm not allowed to yet.</p><p></p><p>None of these circuits will hopefully ever be drawing the maximum possible loads - far from it. And there is plenty of protection.</p><p></p><p>I'm not doing this work myself, I'm just at en early stage in the building/rendering/damp-proofing and I want to get the conduits into the walls and the spec of the cable runs sorted before bringing in a professional sparky to install and sign off.</p><p></p><p>Thanks in advance</p></blockquote><p></p>
[QUOTE="sandypants, post: 423933, member: 27961"] Hi, Brand new to the forum, just after some expert advice/opinions: Amongst other circuits, I have a radial circuit installed on my main home CU: 6mm^2 cable on a 32A MCB (with RCD). This was installed to supply power to an outdoor brick building, and then onwards to a few extra areas beyond. I'd like to put a consumer unit on this radial circuit (in the brick outhouse) - and then another consumer unit beyond that (in a 18m distant shed) to distribute the circuits and provide protection. Unsure whether I am overloading my original domestic 32A radial circuit by having a successive 32A circuit from the outhouse CU supplying the next CU (again, as a 6mm^2 radial). In addition to the 2nd radial described, there will be a 16A ring main for plug sockets, a 3A lighting circuit and a 20A ring main (for washer/dryer/deep freeze) in the brick outhouse. I wish the original radial circuit had been a 10mm^2 64A circuit - but it's too late now. Please see the [URL="https://www.dropbox.com/s/0mzyew8goaqv6kf/Wiring.jpg?dl=0"]Link[/URL] for a diagram of what I am intending (I doubt the dropbox link will work but I'm trying anyway, also an alternative [URL="https://drive.google.com/file/d/0B_93kNX8YUsOV3dUam1rMnlZTEU/view?usp=sharing"]Link[/URL]). Is this generally sound? Or should circuit 1F be a lower rating? I would post an image of the diagram but I'm not allowed to yet. None of these circuits will hopefully ever be drawing the maximum possible loads - far from it. And there is plenty of protection. I'm not doing this work myself, I'm just at en early stage in the building/rendering/damp-proofing and I want to get the conduits into the walls and the spec of the cable runs sorted before bringing in a professional sparky to install and sign off. Thanks in advance [/QUOTE]
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Running two mini consumer units from main one, as sub-circuits
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