earthing | Page 6

earthing

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  1. F

    Using Structural Frame as PE

    Hi there, First time poster, thanks for your advice! At the factory where I have just joined, we have some electricians that are mainly experienced in residential installs and not a lot of industrial. I am an electrical engineer with electrical design experience (generally fixed...
  2. M

    Upgrade earthing on supply/dno cable

    In my own house the supply cable is paper lead. VIR cloth to the cutout. The earthing is a clamp round the lead sheath with bare metal strands from the clamp to a small earth bar. I have a 5mm bolt and some washers and I was considering adding a 16mm earth from the bolt on the clamp to a new 8...
  3. T

    Mains water earthing

    Recently been getting some very small static when touching taps. Recently had a stop tap changed and a plastic push fit was used on the mains water suply. Pictures below. Should the earth wire be attached below the plastic push fit? The earth was already there before but the push fit wasn't...
  4. KevinH

    EICR earthing question

    Hi guys, This has probably been asked many times before but just want to know others opinions. Just done an EICR and have found (or not found) any sign of a water bond near stopcock or anywhere in house. There is an earthing block at the meter position with main earth from PME, an earth to DB...
  5. W

    domestic earthing

    Currently in a TT earthed property. The supplier refused to connect to incoming as its too close to the ground to physically fit. TT has always given good readings to not cause any issue. It has been mentioned to me by a qualified HV spark that I could simply tag my main earth terminal to the...
  6. C

    Earthing Conductor Size- Good?

    Alright, so what do you think of these CPC sizes in relation to the phase conductors? 90*C insulation, TN-C-S supply MCB / Live / CPC / Multiplier 15 - 2.08mm2 - 2.08mm2...
  7. V

    UK Interesting earthing in outlet

    What do you think?
  8. A

    Bonding and earthing theory

    Hi, I have a hypothetical just trying to understand earthing arrangements and bonding. For example if I am touching a water pipe and a socket back box with no fault occurring but a load on the socket. I am lead to belive the neutral will rise to 230v as will the earth as they are connected...
  9. A

    Main bonding and parallel earth paths

    Hi all I was wondering if anyone could shed some light on an issue I cant seem to get my head around, say we had a metal socket earthed and a water pipe with main bonding, I touched the both of them in fault condition on socket (live touching metal box) now i understand the bonding puts the pipe...
  10. B

    Earthing arrangement

    Hi Firstly apologies in advance. I am recently qualified ( a bit later in life) and well aware I require years of experience. I was doing work in a 2 bed second floor flat. I have always done a bit of very light electrical work and had my regs over the years so I know a little. I'm now further...
  11. J

    VSD earthing

    Hi I’m abit confused as to VSD earthing. I know they carry high leakage currents but have seen invertors not being directly earthed at the chassis of the VSD as the incoming earth and out going earth are connected elsewhere in the panel is there any benefits or problems with doing this? I know...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. D

    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...
  19. 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...
  20. Zerax

    Earthing system quiz

    What sort of earthing system would you say this is ?

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