earthing

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  1. M

    Transporting TT earthing?

    I know the subject of transporting pme from a house to an out building has been discussed many times. This question is the DNO is only providing a single phase no earth TT supply which is fine. Want to run a sub main with swa to an out building approx 30m away. Would you only connect the the...
  2. M

    What earthing arrangement would you use

    The situation is: Power is needed inside a greenhouse to power a specialized greenhouse heater, a timed motorized window opener and a light. The lights can be double insulated but the heater and windows device are both class 1. The greenhouse has a metal frame that is in good contact with...
  3. Msitekkie

    Separating PME & TT earthing for outbuildings

    I would appreciate peoples thoughts on fixing this earthing setup to correctly separate PME & TT: Setup: Workshop at the bottom of a long garden connected to supply via 3 core armoured cable. Earth rod fitted at workshop, but the earth has also been connected to the PME from the supply & the...
  4. B

    Help with earthing bathroom mirror

    Hi, first time poster. I’ve tried looking everywhere for a solution to this, so hopefully someone can help me. I’m trying to wire my led bathroom mirror, but there are only positions for live and neutral but none for earth (the supply is a typical cable from the wall with live, neutral and...
  5. P

    What type of earthing arrangement is this ?

    Hi everyone, wonder if someone could help me out here, am I right in thinking this earthing arrangement is a TN-C-S ? I am just a bit confused by the earthing block on the side.. I am newly qualified domestic installer so just making sure it's what I think it is.
  6. timhoward

    Main Bonding csa when earthing csa calculated

    Just double checking please - in situations where the main earthing conductor csa is calculated, and in a TNS installation, the 50% bonding conductor csa rule still applies to your final calculated and rounded up earthing conductor size? (As opposed to the tabulated size) I'm doing remedials and...
  7. S

    Earthing mat is making me ill !

    Hi All Sorry for the lengthy first post and use of any non-standard terminology. I'm a bit of a novice when it comes to electronics, hopefully I've done enough due diligence so I'm not asking anything too silly lol ? I've bought a Grounding mat that plugs into the mains (earth wire only)...
  8. A

    House earthing from an off grid solar system

    Hi everyone, I live well off grid in Wales and am presently renovating a small property. As part of that renovation I have had a full off grid solar system professionally fitted coupled with a generator back up. The inverter charger has a neutral earth link as does the generator. The inverter...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. V

    UK Interesting earthing in outlet

    What do you think?
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...

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