bonding

  1. F

    Main Protective Bonding

    Evening all, Recently started working for a company carrying out electrical installations - I've found a job today that didn't have any bonding to the incoming water or gas supplies and both were in metal so do require bonding. Spoke with my boss to explain and said that I was popping out to...
  2. M

    UK Earth bonding requirement for water pipe (metal entry point, switch to plastic after 300mm)

    Good morning everyone. I’m looking at getting an EV charger installed at my home and the company is requesting that I earth bond my water supply piping. The main water pipe entering the property is metal, then there is the stop cock, and after about 100mm it turns into a plastic pipe (total...
  3. R

    Using one cable for multiple Earth bonding

    HI all, I've had 3 x additional gas supplies installed in a building. Can i use one 10mm bonding cable and link these new supplies (keeping the cable continuous by stripping the sheath and clamping into earth straps) or do i have to run 3 new earth cables? Also can i use a staple gun (metal...
  4. D

    UK imagine you have discovered a water pipe in a bathroom

    Q. imagine you have discovered a water pipe in a bathroom that has been repaired at some previous time using a plastic connector -So I am a little confused about this question because, I am being asked to explain why this situation can be dangerous also. how can you "remedy" the situation...
  5. D

    Comical vid from Efix about ground installation earth foundation bonding and earthling

    I wish all updates could be done like this :)
  6. S

    UK Consumer unit TT system far from DNO fuse

    Evening all, I’d appreciate your opinions here: I’m looking at an old (150 years+) stone house. Complete rewire and renovation. DNO fuse is currently where the master bedroom will be (upstairs). Client wants it to be moved to a more accessible location downstairs about 15m away depending on the...
  7. cliffed

    Main earth bonding protective conductors

    EICR recently done, Swa sub mains armouring used for cpc & MEBPC. Installed 40 years ago, water/gas/structural bonding required, these are @ 10mm Tncs earthing system @ origin which is remote from buildings 120mm tails. The sub mains vary in sizes from 25mm to 50mm….what’s your thinking on...
  8. Jon Dance

    UK Gas pipe bonding: permissible options

    Hi guys I’ve seen people state in forums that it is permissible to bond a gas pipe as a continuation of the bonding of the rising water mains. Can anyone supply proof/documentation/official guidelines etc., where this is explicitly stated. Below is an image of what I am planning. My gas safe...
  9. newfutile

    Metal steps secured to concrete (bonding)

    We have had 2 metal steps installed to cover main supply cables (out to flats) from a Ryefield . when measured IR from MET to steps i got 0.091 MegOhms. The usual calculations are for when a 30 ma RCD is protecting (which is not the case here) 91 Kohm is above the usual value of 23 Kohm I...
  10. newfutile

    Pipework bonding in flats

    I have measured 0.08 to 0.15 ohms between earth and pipework, which according to GN8 makes this extraneous, i guess its bonded inside the flats which i have no access to. should these be bonded at the communal consumer unit as well?
  11. D

    Decomissioned gas pipe as a bonding conductor?

    What do you guys think about using decommissioned gas pipe which is welded throughout and 4" industrial in steel. I am clear on regs that say you cannot utilise a gas, oil or water pipe as a bonding conductor but this would effectively safe a lot of time and money.
  12. newfutile

    Metal chequer plate floor bonding

    In a communal electric intake room for flats (meter room) there is lots of bonded trunking and tray, also the metal door frames were found to have extraneous parts linked to earth , these have now been bonded. They have now fitted a metal floor , i have not conducted a IR test to earth as yet...
  13. J

    Swimming Pool- bonding

    Afternoon An internal swimming pool (recessed into the concrete floor of a basement in a domestic house) The pool has a metal frame However all pipes feeding the pool are plastic Am i right in thinking I do not need to bond the metal frame as it is not a extraneous metal part ? nor do I...
  14. E

    EICR gas bonding

    Hello everyone, I am buying a property where the current owner has a EICR stating unsatisfactory due to (3.1g) main gas bond omitted and gas installation pipes. The report also states the following overview:- **General condition of the installation (in terms of electrical safety): Wired to...
  15. A

    Bonding Missing

    Morning all. Just been to a domestic due to a problem on a ring. Found the issue no problem. But when I removed the cover of the CU I noticed a new supply had been wired in for the heating, however the CPC hadn't been terminated and was resting on the MET. So having re terminated the CPC and...
  16. D

    Earth Bonding

    Hi all, My first post-don't be too hard on me! I'm bonding an existing 3-phase power supply (150mm2 SWA cable) to various incoming services: Sprinkler main, water, compressed air, gas steam & condensate etc. According to BS7671, I can run 35mm2 wire. The run to first service from main earth...
  17. cliffed

    Main earth protective bonding conductors

    We now have no need to MEPBC to water if proved it’s not extraneous…is anyone MEPBC metal ducting for HVAC & such.
  18. A

    Is 25mm 3 core swa good for earth and Bonding

    So me and a colleague were having a discussion about using 25mm 3 core swa as a live, neutral, earth and a Bonding conductor when relocating the position of the consumer unit, I suggested that using a 25mm 4 core as I can't see the 25mm earth being big enough for 16mm earth and 10mm bonding with...
  19. C

    UK Water bonding in gas meter box

    Just had a boiler put in on a grant scheme. Water main earth bonding was connected in with the existing gas bonding's pipe clamp on the outlet pipework of the gas meter inside the meter box, then taken through the backplate of the gas meter box, then goes along behind the units to the water...
  20. D

    Earth bonding for EV Charging point

    Good morning I’m looking for a bit of help please. We are looking to get an electric vehicle charger installed at our house but the company have requested information and photographs of evidence showing that our pipework is earth bonded. Our house was built in the 1960s and there was no earth...

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