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  1. E

    EIC additional circuit main switch/switch-fuse/circuit breaker/RCD

    When doing an EIC for an additional circuit (which only covers that circuit), does the 'main switch/switch-fuse/circuit-breaker/RCD' section refer to: a) the MCB you're adding for the new circuit b) the existing main switch (whatever it is) for that board c) [if the DB the circuit is added to is...
  2. J

    Main panel upgrade for Solar ?

    Hello, I am a homeowner and have a solar project coming up. I intend to install a 9kw solar system but I am not sure if I have to upgrade my main panel or not. I have a 200A main panel with only 3 breaker slots, 1 is 100A double pole breaker feeding the sub panel located inside the home, the...
  3. TradeNSW

    Australia Cable from the main switchboard to the sub board in a unit

    Hey guys, thinking of relocating my sub board in my unit to a new location. Does the cable from the main switch Board to the sub board need to be a continuous run or am I able to put a junction box and extend the main cable to its new location?
  4. H

    DIY replacing main service panel

    DIY If I replace my main service panel, is it required that I replace all the wiring in my house , Ohio small 750sq foot home
  5. D

    LV fault tripping HV ring main unit

    Hi all, I have been on a site repairing damage caused by travellers collecting copper for the last week. We have found and replaced cabling to get the site up and running. Power has been on for a few days but today the 11KV ring main unit tripped. This feeds a transformer attached to the main...
  6. C

    Can I spur a socket from an existing fused spur on a ring main?

    I'm sure this has been asked before, but I just want to confirm: Currently I have a spur leaving a socket in the bedroom, into a 13A Switched FCU and running up to power a double socket in the loft. I now want to locate a socket in the old boiler cupboard/airing cupboard to power a tumble...
  7. D

    Main fuse box problem

    Hi Everyone, I have a faulty smart meter, its broken since I moved in and I am putting all my effort to fix this, I am a tenant though. A technician from the supplier visited the property, inspected the meter and he said that he needs to access to main fuse box to replace the meter. We have...
  8. S

    Undersized main earth on eicr

    Hi all, just looking for guidance on how you would code a 2.5mm main earthing conductor on a property with 10mm line conductor. Basically on a massenette the one below has the incoming supply, and the one above I'm working in is looped supply off it the one below, 10mm tails in conduit with...
  9. T

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    Hello All Can I say to start with I am not an electrician but used to be a heating engineer (yes I can hear the groans). I have wired the installation myself using the correct wiring and isolators, racking and trunking and it is not grid tied it is purely off grid with a separate input for a...
  10. S

    AFDD for main supply?

    What would of stopped this happening? Job I did this morning. SWA supply for outbuilding had sliced basic insulation at the gland due to poor wire stripping. Another outgoing SWA feed for an external GYM was actually back feeding water into the consumer unit as it was uphill and had some head...
  11. T

    USA Location for main electrical panels in new construction

    Hi, I have a general question about main panel locations. The house is 120' long so I was contemplating running 2x 200amp panels located on the exterior of the house as marked in the attached photo. The main service and meter is on a pole outside. I had planned on running a trench from the main...
  12. 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...
  13. 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...
  14. 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...
  15. Mdterpsfan

    USA 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...
  16. 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?
  17. RK1984

    USA 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...
  18. 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...
  19. 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...
  20. 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...

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