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  1. N

    UK General curiosity - Main intake

    Hi, I've only just noticed that my 1930s house looks like it has a second, disused intake. Here it is highlighted in red, just to the right of the main fuse And here it it close up Anyone have an idea what it would be for? It must've been there since the house was built as it goes...
  2. L

    Two main fuses in one flat

    Hi I wonder if anyone can help. we’re just about to complete on a first floor new build flat. When we went for snagging we noticed at the bottom of the stairs behind the front door is going to be a cupboard which contains 4 x isolator switches (1 for our flat, 1 for downstairs and not sure on...
  3. Viper22mike

    UK Sub main joining niceic advise Needed

    Joining niceic and doing a sub main to a garage off a tns earthing arrangement using 6mm Swa. The question is I have 25mm tails on 100a main fuse to a down rated dp isolator with a 63a fuse from there the swa. I'm filling in the eic for them to view do I put the 100a or 63a main fuse size in and...
  4. Mdterpsfan

    Main panel and sub panel grounding.

    Brian, DIY but 30-year commercial/industrial master HVAC tech. I have installed an emergency whole-house breaker switch next to my service meter. This will now be the main panel and I have subsequently tied my two grounds from grounding rods into the new panel. The the original main panel...
  5. M

    Main bonding questions

    Probably a basic question In an installation with pipework or cable ladder that's not extraneous as such but is connected to earthed metal What's the logic for not main bonding it as the metalwork can surely introduce a potential in a fault situation?
  6. V

    Neutral Conductor Size - Main Switch to Neutral Bar

    Don't come across this very often - but I've had a CU delivered for a caravan job (not static btw), and it's been supplied with a neutral conductor from the main switch to the neutral bar! Definitely an oversight, but I've got plenty of singles cable in stock, so rather than send it back, I...
  7. RK1984

    Main breaker in the main lug only subpanel

    I am building a duplex. The service enters the house through the wall of one of the units, where the main panels for both units are located. Then the service lines go inside the walls to the garages of both units, where subpanels with all the breakers are located. At this point the subpanels...
  8. M

    UK Smart meter installation possible - main fuse?

    Hi, I have a flat in a rather old building in London. Its subdivided into a few individual flats, and there is a meter board with a gas and electric meter in each flat. My electricity supplier sent someone out a few days ago to fit a smart meter, but the fitter said he was unable to do so...
  9. J

    Sub Main Connection From Meter Box

    Hello All, new to the forum. Would be grateful for advice on whether the following proposal is an acceptable solution or open to any suggestions for improving. The brief is to supply a detached garage with incoming power and CU. Power will be used to supply a couple of sockets, lights and an EV...
  10. M

    Main earth after cut-out replacement

    Hi all, After months of waiting, the fused neutral cut-out at my parents house has been replaced but I am concerned about the main earth. I believe it to be a TN-S as the main earth is attached to the back of the main incoming cable. In December, I got the CU replaced and isolator fitted and...
  11. E

    Fuse missing from main disconnect panel

    Hi there, I run a recording studio out of an early 50's built warehouse. I've been having electrical noise and ground loops in my audio equipment since I've been here (almost a decade) and I've finally decided I can't deal with it anymore. I'm going to install a new main panel as well as new...
  12. Peter55

    Earthing question - three phase into main building, then single phase to EV charger

    Hi there, new to the forum and in final stages of completing C&G level 3; need to complete design project to complete. Am struggling to get my head around how to draw up correct circuit diagram showing EF Loop path for EV charger where initial supply is described as 'three phase TNCS' feeding to...
  13. B

    3rd Floor Flat Lost Main Earth

    Hi All 3rd floor flat has incoming supply via Conduit which was being used as the earth. Conduit at some stage has failed leaving the property with no suitable earth. Would it be necessary to run a new sub mains and renew the supply also or is it within the regulations to run a separate...
  14. E

    EICR question - gas bond off main TNS

    Hi all, is it acceptable or was it in previous regs if not anymore? To take the gas bond straight off the TNS connection shared with main Earth? See pic. Thanks Paul
  15. G

    How do I add a subpanel using three 20 amp breakers with 12AWG from the main panel

    Current Situation: I have three 20amp breakers with 12 AWG in the main panel. Each wire ends in a 3x2.5” metal box along with one neutral wire. There are two yellow wires, a black wire and a white wire. One yellow wire is attached to a 240V outlet and the other is attached to an orange wire...
  16. D

    UK Lighting circuit on a 32Amp ring main question

    First post and Newly qualified, been asked to complete an EIC/EICR on a property after previous electrician carried out the work but never gave a certificate for pretty much a full rewire. I had a quick look when I popped round, and from what customer says, there is a 32Amp ring main for...
  17. amwitte1

    Main Panel and Sub Panel Wiring Issues

    Hello everyone, I hope you are doing well. Several years ago I purchased an older 1971 home (aluminum wiring that has since been fixed with al/cu purple connections). There is also a sizeable detached workshop (copper wiring) in the back. This workshop's wiring is in such disrepair that I...
  18. R

    Neutral and ground separated in Main panel

    Why would neutrals and grounds be separated in a main panel? This is a new build with GFCI breakers for the range and dryer; does that have something To do with it?
  19. S

    Can you connect an FCU directly into a ring main?

    Hi, Can you connect an FCU directly into a ring main? Rather than splitting the ring main and installing a JB I would rather fit the FCU direct. Cheers
  20. P

    Nuisance trippage of main incomer

    Hi all, My situation is is this. I live in a house thats about 40 years old. The consumer unit is the original one . Its the grey metal wylex(?) which has a main switch over to the right and a yellow test button? I think its 100ma ? The fuses have been replaced with mcbs at some stage. For...

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