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  1. richardg

    DNO fuse in a house of horrors

    Just been this sent this remotely by a former client who is just about to move into her ‘new house’, survey report did not flag any problems - builder was asked for his knowledge and said all’s good and now a smart meter fitting turned up and looked at this and scuttled away in terror? where to...
  2. C

    DNO earth

    Hey people, My friend just bought a flat which has had a solar PV install in the last couple of years and he wanted me to have a quick look (not that I touch PV) Anyway, I found this: It looks like the guys have rammed the earth up the sleeve on the incomer? I can't see why they wouldn't...
  3. B

    Splitting dno supply

    So my client owns a shop and is building 2 small flats above... the shop has a 3 phase service head supplying a 3 phase board via a switch fuse isolator.. My question... How do we organise tapping off that service head and getting two metered supplies installed in the flats? Ti
  4. J

    Problems with local DNO

    While doing a few initial tests during a quote for a rewire the ZE results were around the 3 ohm mark on what appeared to be a TNS system. An old iron conduit with two core cable inside and a steel clamp around the intake for the earth. initially explained to the customer, and got them to...
  5. GBDamo

    DNO - Supplier stand off.

    I have a site with a three phase service head with only a single phase in use via a single phase meter. Phoned the DNO, "This is a job for the supplier." Phoned the supplier. "Won't touch the service head as its DNO property." Phoned the DNO back, "Send us a picture we'll have a look" I...
  6. Dartlec

    DNO or Not DNO, that is the question....

    One of my landlords has an upstairs maisonette which will be changing tenants next week so will need an EICR - I already know there is an issue from a while back which I notified to landlord with a damaged 'Fuse Head' This is how it used to be ?‍♂️ (Yes, live parts were under the "insulation"...
  7. ETradesmen

    New build - DNO fuse size

    Good morning one and all, I have a new build coming up (Hertfordshire) and was wondering what size fuse the supplier install now? The reason why I’m asking is because a sub main is required due to the client not wanting the CU near the meter. thanks,
  8. UKMeterman

    UK DNO transformer + switch missing HV earth

    An interesting sign has appeared on a local DNO distribution transformer, earths missing from Transformer and HV switch. Is this what is meant by a hot site?
  9. M

    Condition of service head/cut out fuse etc. report to DNO?

    Hello Came across something like this.Is that something what i should report to DNO?.its supply to 2 flats.New cable on the left goes to first floor flat where electricity meter is.Its not SWA.All seals has been cut off. If i report it do they come on short notice and put new service head etc.?
  10. C

    Are DNO cables fused?

    Are DNO cables in the UK fused before going into a building? And if so how? What happens if you were to short the cable out before the cutout main fuse? View: https://youtu.be/HQSohl-C_nk?t=180
  11. E

    DNO Isolation For Changing DB

    Hi All, I need to change a DB in a block of flats in central London (W2 postcode), where EDF can't give a date for at least 6 weeks to come and isolate the supply, but at the same time won't / can't give out a date after this, which makes no sense to me! This is both options of just popping...
  12. S

    G83 DNO Notification for DIY Install

    Hi, We're getting an extension with flat roof soon, and I can squeeze 3kw of PV onto it so I was going to DIY the install, considering no FIT meaning a proper installation isn't cost effective. It certainly doesn't look out of the reach of a sparky without PV training so happy to give it a go...
  13. M

    DNO UK power networks changed incoming overhead and now have PME TN-C-S but ccu connection to TT

    Hi all. I'm currently training as an electrician so would like your views on this for clarity and if I need to get someone in? I have just moved in to a new (very old) house and on inspection of the CCU I noticed the incoming service cable from the overhead was chard at the top of the dno head...
  14. A

    Dno supply running through house

    Hi all, have been to a bungalow (well half bungalow half building site at the moment) and the main supply is in the middle of the basement. The dno supply is coming from above so is hidden in a wall and then I can see it going through the loft to outside. It's a good 8 meter run. Has anyone come...
  15. D

    Cable run behind DNO board

    What are people's thoughts on running a distribution circuit behind the DNO's Cutout? I've a consumer unit mounted with no clearance above or to the sides and I'm struggling to find a route to it easily. There is a possible route I could use, but it would mean running the cable behind the dno...
  16. Jay 1987

    Harmonic current / distortion

    Hi guys I have a question, when we consider the assessment of general characteristics for any installation, who Measures /considers/ enquires about harmonics. is that the job of a normal Installation spark ? If it’s not who does it and how do they test for it? if it is the job of the normal...
  17. S

    Solar Panels Installer not informed DNO of installation

    Hi, My installer (who no longer exist) didn't bother to inform DNO of the installation. I have got in touch with the DNOband they say they require me to contact another installer and get them to do 'commissioning confirmation and a suitable schematic diagram' for me to register the system...
  18. WillBish

    DNO negotiations

    My negotiations with the DNO continues. Last year WPD told me there was no capacity for generation at my property without significant upgrades. Apparently the overhead conductor is relatively small and the loading on the network in the area is low. The combination of these two factors means that...
  19. bigspark17

    Ec7 meter install DNO

    Just had a customer been refused by dno to change to an ec7 meter/tariff they said they dont do it. Is this right? Cant see how this can be the case?
  20. Lister1987

    Wanted Old board, Newer board, DNO head & old meter for practice rig

    I've been doing my usual and watched a JW vid explaining what belonged to whom and it got me wanting to create a mock-up myself to practice on - I know we should only be touching consumer-side equipment but the purpose (and hope) of having the cutout is so I can setup the various earthing...

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