earthing

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  1. D

    6mm Main Earthing Conductor

    I'm looking at doing a CU change. Current main earthing and bonding conductors are both 6mm. Tails are 16mm on a 60/80 amp fuse (TNCS). ZE = 0.1 , 230v, single cable not bunched. Looking at the regs (543.1.1) and applying the adiabatic equation (543.1.3), 6mm seems ok for main earthing...
  2. ETradesmen

    Very odd current through earthing.

    Good evening all! I was on site today relocating a consumer unit in a domestic property and got a hefty whack of a CPC... I have never seen this much leakage in 20 years of work. It is a TNS system, the main switch was off (I got a whack of a gas bond). I am unsure what to do with the...
  3. KevinH

    TN-S earthing issue

    I have just carried out an EICR at an old property and found this issue with the main earthing conductor. It has a TN-S system but the earthing conductor emerging from within the taped up tar coating just before the cut out is only 4mm2 of (what looks like) steel wire armourings. It is 100mm...
  4. J

    Car charging questions and earthing.

    Hi all, I'm a trainee and just have a question. If the earthing for the Car charging is changed to TT and there is a light fitting close on PME, can you get a shock from two different earth potentials (light fitting and car)? Or does there need to be a fault? And does that mean you can get a...
  5. M

    Earthing A Supply To A Wooden Shed

    I am considering the options which may apply to the earthing arrangement for a supply to a wooden shed. The property has a TN-C-S supply from which a 60A isolator feeds a 3-core 16mm2 swa sub main 13 metres to a detached garage. The property has a supplementary earth rod and the garage also has...
  6. K

    Earthing a cast iron pipe man light

    I have constructed a cast iron pipe man figure ( steam punk type ) using a small spotlight with on/off switch on the lead then to the plug. Need to cut the lead and extend this to fit through the cast iron pipe ( between on/off switch and the light unit ). Cable is only two wires Blue/Brown no...
  7. Darkwood

    HMO earthing arrangements.

    I am having a debate about the requirements of earthing in an HMO - The incoming supply is 3ph 200amp and Gas and Water are bonded 50mm as needed in this case. The building is one block with its internals divided into 20 flats, each flat has its own distribution board rcd protection...
  8. M

    Does this look like an earthing issue? Meter readings attached

    Hi folks. I am regularly experiencing tingling shocks from my laptop and kettle. Both of these things are plugged into something with a ground plug. I decided to measure the neutral to earth voltage, at least for the nodes I can reach at my plug. I see significant AC voltages measured between...
  9. Zerax

    Earthing system quiz

    What sort of earthing system would you say this is ?
  10. Ben Keer

    Earthing and bonding

    Hi all. Following on from some research into the adiabatic equation, I realised that its ok using it to determine the main earthing size but I couldn't work out whether it gave me a size big enough to also support main bonding from it. The scenario being if I were wanting to run a submain from...
  11. RyanAspire

    New circuit design question

    Hi guys, Have a job on next week for a friend, my usual industry is maintenance so want to be sure I am checking all the boxes here. He intially measured the run out at 122m, which would require a 70mm cable due to volt drop, however its changed slightly and I have other queries... He now...
    • RyanAspire
    • Thread
    • cable calculations cable size caravan circuit design earthing mobile new pme protection question rcd static
    • Replies: 53
    • Forum: UK Electrical Forum
  12. H

    current leakage to earthing line

    can some one help me with this problem? I have one spike guard which has only neutral and line wires. but the sockets on the spike guard are 3 pin, the problem I am facing is that : I am getting current into my earthing line, I have got shocked many times from chargers, fridge surfaces, etc. I...
  13. S

    Earthing Rods for EV Homecharging

    HI all. I am not an electrician and know only but a few things about it so I want to ask a question . So Chargemaster is supposed to install a home charging unit on my property. Their technician came and said I needed additional electrical work (either an double pole isolation switch or run a...
  14. jmmrly

    UK Outside socket earthing

    Hi, I'm located in the UK and replacing my outside double socket plugs with ener-j smart wifi sockets. I've wired it as the picture below, exactly the same as the old one. I used my tester and it's only earthing one plug. There's another earth socket but I didn't need an earth wire in each one...
  15. J

    UK Sub Main Armouring Earthing Question Combined CPC and Main Bond

    Hi I have reviewed a few posts around this subject, but my question is not covered. I know that the Submain Earth has to be sized on the DNO incomer, not on the submain to the external building itself. My question is if I need two main bonds in the submain building, for example one for ground...
  16. B

    UK Earthing a mechanical coin prepayment meter on a TT

    I'm a rusty 16th edition retired spark. At home I'm aiming to send power to my outbuilding for a couple of lights and one 13A socket. I have a few people that come informally & use my outbuilding to keep & look after their animals. They could do with some light to see by, and maybe the facility...
  17. S

    UK Quick bit of advice about earthing

    Good morning all, first time poster, thanks in advance for any help! I'm planning on relocating a socket on my downstairs circuit about 2ft from its current location. Having taken a look at the socket, it appears the circuit is earthed at this point, the other side of the external wall pictured...
  18. B

    UK Earthing problem

    Hello folks, I have been using a BUZZIT socket Tester around my house today and, I have found that I am getting a fault reading of 'no earth' from it. I have had an extension built a few years ago and a new ring main was installed for that. When I did the check on those sockets they were all...
  19. spud1

    Should internal links in consumer units be double insulated where TT earthing is present

    Hi, So I was reading the notes on regulation 531.3.5.3.2.201 (Page 156) today and noticed Note 1 that consideration should be given (Where TT earthing is present) to the manufacturer's internal line cable links on the supply side of an RCD being insulated AND sheathed! Does anyone know of any...
    • spud1
    • Thread
    • consumer double earthing insulated internal links present units where
    • Replies: 17
    • Forum: UK Electrical Forum
  20. M

    Earthing system

    Whats this.?.Cable on the left is alluminium, right one is copper. A couple of strands has been taken out from copper neutral and connected to outer pipe of left cable and then to main earth terminal. Is it tns,tncs,tt?,no earth electrode anywhere found

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