electrode

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  1. A

    No earth electrode visible?

    Hi all, Carrying out a periodic inspection at a domestic installation. Semi- detached house on a row of houses. I cannot for the life of me locate any sign of the earth electrode inspection chamber. Just wondering how you would number this? A 1,2,3 or a 4? Thanks
  2. P

    Can earth electrode resistance values be too good/artefactual?

    Hi all, Would like some advice on the below. Context: Rural French domestic installation TT system Earth rod is situated inside the property, buried in the concrete subfloor Distribution transformer (overhead supply) is very close, on a pole approx 40 metres from the property I did some 3...
  3. johnwicklover

    Does a three-pin socket used for Electrical Vehicle charging need a earth electrode or open PEN fault detection device?

    As the title says, does a three-pin socket (external) used as charging point need an earth electrode or open PEN fault? Are mode 1 and mode 2 exempt from this ? I was under the impression that anything used as EV charging point and if located externally, the installation would need to have...
  4. timhoward

    Calculating broken PEN touch voltage with backup earth electrode

    My brain has been exercised a bit by this. Am I on the right lines with this extremely simplified example: If we take: -TNCS installation with a Ze of 0.2 ohms. -Plastic services, nothing bonded, keeping it simple -Line conductor resistance from supply transformer should be similar to PEFC and...
  5. J

    UK Earth Electrode Test - what can it tell you that EFLI test cannot?

    Hi Please feel free to shoot me down in flames. I have a TT system that I need to do some work on soon, one of which is to move the Earth rod (put in new one). I have never had to an Earth Electrode test before. I have looked at some videos on line and the GN3. But i cannot derive what...
  6. J

    UK How close to a lake can i install an Earth Electrode?

    Hi Arrived at a portable, metal home. I say that. Its been made out of a shipping container to get around local planning on someones property. It had been signed off by a sparks, so i am told. The earth rod has been Installed in the lake with the top a few feet out of the water near a...
  7. K

    Current reading on ground electrode conductor in main panel

    I live in the Philippines but I have the same US electrical system (2 x 110V hot + 1 x neutral). I have two ground rods buried 8 ft. deep and connected to the main panel. Netural and ground are bonded in the main panel. And from the main panel, all 4 wires (2L + 1N + 1G) go to sub panels. Ground...
  8. M

    Electrode Seperation

    Hello I am wondering what would be the correct method for testing electrode separation distance For example, if installing an EV charger or hot tub from a PME supply and chosing to TT the EV charger / hot tub, how could you ensure you are a sufficient distance away from any buried PME bonded...
  9. A

    tips for making earth electrode

    dear electricians, I am going to install 2 earth electrodes for a block of 4 apartments. can you please give me some tips on how to drill the hole for it and what diameter and length the hole shall be . also if you know any other tips that might help my installation please let me know. some...
  10. Strima

    Earth Electrode Tester Recommendations?

    The time has come for my company to start using a dedicated earth electrode tester as we have some sites coming up that have no supply installed and we need to install electrodes before they can be connected and powered up. We have a large range of MFTs and I can't justify the expense of...
  11. N

    Earth Electrode required??

    Hi I have been to see a job that has a TT system installed for the house. Dual RCD board in the house. All up to date. I am looking to use a spare way in the house consumer unit to run some power to the garage. If i use a 3core SWA (one of the cores being the earth), do i need to install an...
  12. E

    Installation of grounding electrode in crowded areas

    Hi May I know about the standards in the installation of grounding electrode in crowded areas where clearance from the perimeter is not achieved?
  13. C

    Bonding and earthing

    Hi... I think I know the answer to this question but just wanted to hear what others said.. I'm upgrading a CCU and as part of the job I have done an inspection of the current installation which was a diy job. I don't think the owner was qualified but they have done quite a professional job...
  14. G

    Unprotected and damaged Earth to Electrode - C2 or C3?

    C2 or C3, which do you think? Can't make my mind up. Any other thoughts? From MET, through wall to Electrode, not clipped to the wall, just dangling free. Electrode fully buried at the moment, under leaves and debris. Not cleared this away yet. Then.... .. as you can see, the insulation has...
  15. C

    Domestic Zs 5ohms! pme using electrode

    Hi. I have a family member who requires a new CU. She still has a rewireable fuse box and still has an ELCB. So no RCD's. Her install is a deathtrap waiting to happen from an earth faulr point of view! I replaced a socket on wall today and measured Zs. It was 5Ohms!!!! Shocking. I checked...
  16. G

    TT earth electrode

    What is the max resistance at the time of installation permitted on customer earth rods in a TT supply?
  17. D

    Confused...max electrode resistance with RCD?

    Sorry guys. Probably sick of me by now got exam tmrw and checked old posts and books but still bit confused with allowable max electrode values. Does max 200 ohms still apply if RCD is inplace? If so why do we even have a max resistance for rcd disconnection if these values are so much more than...
  18. J

    Fault current, and earth electrode resistance: Numbers not making sense

    In "Advanced Electrical Installation Work" by Trevor Linsley, he says that an earth electrode rod that is 1m deep will typically have a resistance of between 10 and 200 ohms. Given that fault currents can supposedly, momentarily, be in the order of 1000's of amps, this makes me scratch my head...
  19. L

    Earth Electrode Testing

    Hi, How to test an earth electrode resistance for Lightning Protection System in the middle of large concrete pad? I cannot not find a soft ground for spikes to drive in for testing. Is there any other ways of measuring the earth electrode resistance value? Thanks Laxi
    • laxmi
    • Thread
    • building earth electrode lightning resistance testing
    • Replies: 10
    • Forum: UK Electrical Forum
  20. S

    How to work out average earth electrode value

    Hi guys, im doing revision for 2394 and got a question on getting the average ohms value for an earth electrode test. the readings obtained were 179,181 and 185ohms and they asked for the average. i have checked GN3 but it ain't clear. can anyone give me a method of how to work this out. cheers.
    • Sb8389
    • Thread
    • average cheers earth electrical work electrode out question readings value
    • Replies: 2
    • Forum: UK Electrical Forum

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