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Electrical

New build. All electrics brand new. Design question

Anonymous user 01/03/2024 - 3.03 PM

My builder promised me he would get a professional to design and install new electrical wiring and unit whilst considering electrical demands and circuits and light positions. However, we have got to that stage and he won’t deliver on that. He said he will wire it up him self and give me an elelectric EICR from another guy. I’m not happy with this as I want to make sure everything is documented properly. I’m not technical at all but need some advise of things to consider I was thinking that there should be some form of a wire diagram of where the circuits are and how they are wired to the control unit. Should each room lights and circuits be on its own control module or it doesn’t matter. How best can I get this designed. Im stuck and the builder will do what he wants and has us under his thumb. He told me there was no such thing as an electrical map but I’ve seen stuff like this been documented before At the very least I can prevent him going down the wrong path if I can at least challenge him and drive some part of the design. Don’t want my house to be built but the electrical stuff being fundamentally poorly designed. Is there something can help me of things to consider when designing the whole electrical map of the house and things to consider e.g single phase with two car chargers operating at the same time. Would that be enough? I’ve heard three phase would be adaquete. Any help would be grateful. It’s not fun building a house!

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4 Answers

Alexander Williams

Rating: 5 out of 5
Sheffield
Hi, generally for domestic work you won’t be provided with any schematics or diagrams. However, just providing an EICR for a new electrical installation is illegal. They should be providing an EIC instead, and notifying the work to the local authority (you should receive an EIC certificate and a separate notification certificate) these should be provided through a competent persons scheme (Napit or NICEIC). If not, and you are only given an EICR, then they have broken the law and the only reason for doing so is because the job has been done cheaply (ie by a builder and not a qualified electrician) and therefore poorly. To summarise; Get a qualified and registered electrician to design, install, inspect and test the work and provide an EIC (The EIC will have a breakdown of the cable size and installation method, number of points on each circuit, breaker sizes, test results etc ) and notification. If not your builder has broken the law for this type of work plain and simple. There’s enough shoddy electricians out there who get it wrong, let alone builders. 100% of electrical work I have seen carried out by other trades and not actual electricians has been wrong in some way. Just because the lights turn on does not make it safe. Only reason he’s offering an EICR and not an EIC is so he doesn’t have to pay an electricians wages to install the electrics properly
Answered1 February 2024
4

Anonymous user

I strongly advise you to stop your builder from doing ANY electrical work. I would strongly advise you use an electrician registered with a CPS scheme NICEIC or Napit are where you can find one. An EICR is a condition report for existing installations. For new consumer units and circuits or full/part rewires you will require an Electrical installation certificate and a certificate from building control these are very different from an EICR It is highly likely that if you would like to have two EVs operating at the same time you will need a three phase supply, things like the earthing system, size of the main fuse and the maximum demand of the house all need to be taken into account when designing the installation. Would you let a mate carry out brain surgery on you if he knew some one who could sign the hospital forms? Very dramatic I know but electrics can kill if not done right
Answered1 February 2024
1

PIRUS Electrical LTD

Rating: 5 out of 5
Treorchy
Hi There All new build properties ought to be issued with an Electrical Installation Certificate (EIC) rather than an Electrical Installation Condition Report (EICR). An EIC has three component parts: Design - Installation - inspection and testing. On smaller properties it is common to see one individual sign off on all three aspects. On bigger more complex projects often individual aspects of the project will be signed off individually. EICRs are typically issued when an installation is being retested at a defined period after the initial installation and at regular pre-determined intervals thereafter. Councils will sometimes except an EICR in lieu of an EIC but typically this is as a last resort. One reason for this is that an EIC requires the installer to confirm that all cables are installed correctly, that is, supported throughout the length of their runs, separated from other services and not otherwise damaged during the installation process. This is called initial verification, which is not a requirement for EICRs. With regard to wiring diagrams or schematics much depends on the complexity of the installation. A simple terraced house does not necessarily require a schematic whereas a large 3 phase installation likely would. Individual rooms do not necessarily require individual sub-consumer units and circuits - it’s really all about circuit diversity and loading requirements. In this respect 3-phase supplies are always better than single phase. For example a 3-phase board requires smaller diameter supply cables than a single phase board with similar loading. Hope this helps. Bob PIRUS Electrical
Answered1 February 2024
1

Correct Connections Electrical

Rating: 5 out of 5
Eastleigh
Unfortunately, the responsibility lies on you to have it notified, personally, I don't agree with this and it allows unqualified people to carry out work that they shouldn't be doing. An EICR. isn't the correct paperwork for a newly built house. With a project as large as yours building control will undoubtedly ask for the correct paperwork. A others have correctly said. Use a registered electrician. I hope your project runs smoothly.
Answered6 February 2024
0