1. electrical mt

    Main incomer tripping

    I was called in a block of office saying they have a problem with the main incomer. During the night nit all nights randomly the main switch in the switch gear is tripping. At night the offices are closed only the survers are running. Has anyone encountered this problem? Or what test you suggest?
  2. 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...
  3. G

    Is this a legit place to install a DB?

    It just seems like it’s blocking access for maintance. Seems crazy to me to put it there.
  4. P

    Main incomer

  5. I

    Checking Calibration of factory incomer electricity meter

    I've been asked to confirm that our site electricity meter is accurate! Easy on a small site, but 6 cable feed,and a few thousand amps, leaves me short on ideas. To confirm, this is the meter that records electricity usage for our bill. It's a CT style. The meter doesn't give a live power read...
  6. AyresomeBoro

    Main Incomer and Meter Mounting

    Hi all, I've purchased a property recently and I've managed to have look at the main incomer today. The main incomer and meter are mounted on slatted wood (looks like floorboard?). Am I right in thinking these should be fixed onto a flame retardant / non-combustible board? I was going to...
  7. K

    UK RCD keep tripping.

    Hi All.. I have a 16mm 3 core swa feed a 9way split board in shed, 30m from incomer .. from the split board I have run a 10mm 3 core swa to 2 way board for hot tub. This has a 63amp rcd in it.. the other end at the split board is also a 63amp rcd on its own of one side of the split board.. this...
  8. Marcus Vaughan

    BS951 Bonding Clamp on the Incoming Supply

    Hi all, Just been to look at a job for a consumer unit changeout, checked the supply and, Not sure you can see it too well but TNS system with older earthing conductor in green kind of sweated onto intake (connection does not feel too good), but disconnected at the other end (goes into that...
  9. V

    hager invicta 3 - rcd incomer neutral

    hi about to install a invicta 3 , hager 3 phase board. the neutral on the board is on the left, yet the 4 pole time delay rcd i am going to use has the N labelled on the right hand side of the RCD, so with the copper incoming kit links it won't fit? are there Hager version rcds with neutral on...
  10. GBDamo

    Antiquated incomer...........

    Any of the site historians like to explain what this is all about? It looks like one side is a 40A main fuse but the other, exposed, side attached to the 15A switch? By the way it was open when I got there, honest. Need the DNO in to put in an E7 meter and teleswitch, if that's how they still...
  11. J

    3 or 4 Pole main incomer?

    When ordering a 3 phase + Neutral DB, I forgot to specify that I wanted a 4 pole switch for the main incomer. What came was a 3 pole main switch with neutral link. My question is why would you opt to use a 3 pole and neutral link instead of a 4 pole switch? Surely a 4 pole switch is always...
  12. captaincaveman

    Main bonding with metal water incomer but plastic installation

    Hi. Quick question. Domestic property recently rewired by niceic spark. Water incomer is metal for about 3 feet into the property (celar) but the rest of the water installation is plastic. Looks like during the rewire the water bonding was broken on purpose. Does it need to be bonded again? (My...
  13. R

    Isolator versus protection device on main incomer

    Hi, i'm only a student so please forgive me for the basic question: Say you have a generator or power transformer serving a main mccb panel, why can't the main switch of the panel be just an isolator? I've only seen the main switching device as a mccb or acb. I know that in a house you'll have a...
  14. S

    Will a Fuse Finder do this?

    Hi, I'm working up an estimate for a board change for a flat in a small block. Checking for the main incomers in the Dry riser cupboards and of course the labels are 'inconclusive' to say the least! I confess in the past I've just pulled fuses (one was 5 fuses until the right one) but whacking...
  15. T

    Can you identify this cabinet/TNS TN-C-S type

    Anyone recognise this typ of incomer in cabinet and the earth strapped to presumably paper type incomer doing EICR in flat this is the main riser off to Wylex BS1361 fuse then up to flat in 10MM² TNS or TN-C-S ?
  16. L

    Tp+n Dis Board

    Morning All I have a Hager TP+N Dis Board that i am installing later on this week. I need to purchase the switch disconnector for the board separately. Im unsure of which type to buy as i am getting conflicting statements. Its Between: 4 pole 250A Switch Disconnector 3 pole 250A Switch...
  17. G

    Earthing inside a submain panel from main swa incomer

    OK, going to keep this short. Supply is 150mm 4 core SWA, with NO supplymentary earth ( calcs done by others, ) QUESTION IS. Do you NEED to run an earth ( is it a regulation) from banjo on inside to earthing terminal inside board. Common sense and a simple ohms continuity test (0.01 ohms)...
  18. T

    Electrical incomer too old?

    Hi, Apologies if I'm breaking a million rules by posting (and registering here) as I'm not an electrician, but I had a question about the safety/age of something electrical. I have just recently bought a house, and the survey flagged up possible electrical issues. We had a local electrician...
  19. C

    Single Pole RCBO in TT with Time Delay RCD Incomer

    Hello, Newcomer to the forum, so hello all. Just to clarify, although I understand most of my way around the regs and workings, still get an approved guy to to any work......just thought I'd get that out of the way! Anyhow, I have an old property that fed by good old overhead Live/Neutral so...
  20. D

    Moving Electrical Incomer

    Hi Im considering buying a repossession and was wondering how much it would typically cost to move the main Incomer about a 3 foot. It currently comes out the floor in the kitchen and is about 20 cms off the floor level. Realise i cannot move it myself as it's non-contestable work. Any thoughts...


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