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  1. J

    Bonding swa and the regs

    Hi guys got a few questions on the regs. Do we have to bond both sides of SWA cable if we are using a core for earth. And if so would it need a banjo and fly lead when going into a metal enclosure? Also does the fly lead back to the panel/CU have to be connected to the MET? Thank you guys
  2. T

    6mm water bonding on PME

    Hi all, I imagine that this has been asked a few times, but here goes. A customer who is selling their house has been on looking to change the consumer unit. Getting to the gas isnt a problem but the water is impossible without desctruction of some sort. Concrete floors, and the stopcock is on...
  3. A

    Structural steel bonding clamps

    Hello All, I am working on a kitchen extension which has 3 Universal Beams bolted together which sit on block-work. There is no direct connection to earth. However when tested it has a path to MET of 2kOhm. As a result I plan to bond this steelwork. The design of the room means these beams...
  4. J

    Industrial and supplementary bonding

    Hi guys I’m still working towards my NVQ level 3 in electrical maintenance within an industrial environment pumps and process equipment. I know this question may be a bit vague but I’m confused about supplementary bonding in my working environment. Here are a few of the things I’m confused...
  5. J

    Earth bonding metal balcony

    Last year I had a large cast-iron balcony constructed with steps down into my garden. The balcony is bolted into the walls and also into the pavement where it meets the garden. Is there a requirement to earth this? If so, should it be a separate 10mm CPC direct to the CU or could I link it to...
  6. D

    TL inverters And array frame bonding

    Hi again. Right, I am seeing very mixed reactions and comments about the below question, I am just hoping to find a basic answer and reference please. If you are installing a TL (fronius primo 3.6 in my case) to a domestic property, in the loft space with 16panels already installed on the...
  7. J

    Bonding steel conduit around plastic switch

    Any recommendations? I have 25mm steel conduit going into 20mm reducers feeding a plastic time guard switch and then returning to steel conduit again on the other side. An earthing nut is too chunky. I think I need those smaller flat brass plates you get on SWA cables. 1588093418 Found them -...
  8. M

    Clarification on gas bonding please

    Hi. Could someone please clarify bonding requirements for me please. I know requirements are to have a seperate 10mm earth bond conductor for water and gas or that these can be in one cable if looped between each other. I have been working in a couple of properties lately that are in residential...
  9. M

    Bonding combi boiler gas pipes

    From my understanding you need to run both a 10mm earth from CU to water stop clock and seperate 10mm to gas, exception being if cable is uncut can link both gas and water together. In a scenario where been asked to change consumer unit but getting to gas pipes of combi boiler is practically...
  10. J

    Supp bonding needed with RCD + testing supp bonding

    Hello there all, I'm a fairly newly qualified electrician and have been doing more and more EICRs lately, if someone could actually trawl through my long question and answer it then I shall be eternally grateful I have tested 3 electrical installations in the last week with no RCD devices, all...
  11. W

    Bonding Metal Railing

    Hi, I'm taking swa out of the shed and fitting it along a metal fence with metal fixing band. Swa goes into a wiska box then flex from the box to a light that's bolted to the metal fence. Circuit is protected by rcd. Does the fence need to be bonded at all? I'm guessing it's an extraneous...
  12. Pretty Mouth

    Why are main protective bonding conductors sized as they are

    Hi all. Hope you are all well and virus-free. This question is not how to select main protective bonding conductor sizes according to the regulations. That I understand how to do. What I am asking is: Why do the regulations require such a large CSA for Main Protective Bonding conductors...
  13. H

    Max continuity reading for bonding

    Good evening I was always taught the gas and water bonds should have a continuity ideally with a maximum of 0.05 ohms, is this a exact maximum or a rule of thumb and if it was higher than this what coding would we give it? I had a look through the codebreakers booklet but could not bit see an...
  14. C

    Sub main & bonding conductors

    Installing Swa 35MM 4 c,to new school block. This supply will come of a MPB,nearby,to me the supply to this MPB does not comply. Concern once again are the size of the bonding conductors realative to the the Main REC supply. The drawing we have,have no input on this, it’s a Tncs system,& earth...
  15. E

    UK Main Bonding Dilema

    Hi guys, just looking for a few thoughts on this one. This is a pretty big property with the gas meter situated in a small outhouse. There is no power in the the outhouse. The supply pipework comes out of the ground in copper into the meter. Then exits the meter in plastic and goes below...
  16. A

    Unable to locate water meter/stopcock

    Hello all, just want your opinion on something. I'm currently testing retail stores and I cannot locate the water meter/stopcock. There is a 10mn earth that goes into the ceiling from MET. I have went round with my R2 lead and am getting 0.03-0.04 in kitchen, toilet etc. Like I said no sign of...
  17. D

    UK Static/Tingle from shower/towel rad.

    Hi, working in a property a couple of years old. Earthing System is a TN-C-S. Customer’s daughter/wife have both complained about receiving a “slight tingle/static sensation” when using the shower in only one of the bathrooms (when touching the shower/or towel rad). I’ve checked the incoming...
  18. T

    Bonding question

    Alright folks, Looking for a bit of advice with supplementary bonding - pictures attached for context. Bit of background - I'm in the process of repairing some metal bollards: I decided the best option was to rip out the old guts which comprised of some old fluorescents complete with all the...
  19. Ruairi Hansen

    Gas bonding

    Hi guys just wondering what peoples thought is on this. I was out looking at a job today and noticed the main gas pipe is not bonded at the meter but has a 10mm earth at the boiler is this a code c2, c3 or nothing?
  20. W

    Moving equipotential bonding, Minor works>

    Hi, I was having an disagreement with a work mate, a client has been told that their bonding (gas) is in the wrong place, (it is). This is the only job we have to do there and obviously after moving it and carrying out the required continuity tests, would you issue a minor works certificate...
  21. K

    Industrial I need someone to enlighten me about Earthing and Bonding. We've just completed the construction of four Fabricated Steel Bay Structures with a tota

    I need someone to enlighten me about Earthing and Bonding. We've just completed the construction of four Fabricated Steel Bay Structures with a total of 354 Stansions 102 Beams, all connected to the Porlins, the place is to be used to seat 120,000 persons. I am not in doubt of the importance...
  22. T

    Main bonding to water question

    Hi folks, Just wanted to check and see if bonding is required in this situation: There's no bond to water pipework, bond to gas all present and correct There is a piece of plastic pipe at the point where the water enters the building, probably around 100mm in length There is then a mix of...
  23. GBDamo

    2.5mm or 4mm SWA armour bonding

    Armour not CPC. By the letter of the regs 2.5mm is acceptable as the DB offers both mehanical and corrosion protection. Just seems a bit puny on a 10mm SWA, what about a much larger cable? Can some of the boffins explain why 2.5mm is deemed acceptable. Cheers
  24. A

    Earthing and bonding new build

    Hi guys bit of advice needed to save me some time and money. Earthing and bonding required in new build property. 10mm earth to be ran to gas meter to clip to gas pipe that will enter property. This gas pipe then goes to a combi boiler where I will bond all pipes at combi to the gas pipe (gas...
  25. MarkRibbands

    Bonding metallic back boxes. Best practice?

    Something about the way this box is bonded feels wrong. I prefer the box to remain bonded even with the accessory removed. Is this method compliant? What do others think? (Ignore missing grommet) (Taylor Wimpey new build)
  26. L

    Gas Bonding Conductor in 20mm conduit

    The scenario, Property has no bonding to gas meter. There is a 4mm T+E radial from the DB to an outside socket which is located 300mm from the gas meter (external meter). The 4mm T+E is housed in 20mm plastic conduit running along the external wall. To prevent things looking a complete mess...
  27. driverman

    Domestic Additional supplementary bonding

    Ok new house. New install cert issued. However, no supplementary bonding that I can see and accessible . There is a 10mm earth wire connected above the water stop cock point of entry under the kitchen sink. However, no cross bonding to the hot pipe. According to install cert the cross bonding...
  28. B

    Bonding Cast Iron Pipe

    Hello. The toilet is connected into a cast iron waste/soil pipe O.D. 150mm. Apparently, this is an extraneous conductive part and is thus supposed to have a main protective bonding conductor connected back to the MET. There is a bonding clamp for 150mm O.D. pipes available. However, the pipe...
  29. Maxine

    Domestic Earth bonding for meters

    Hi, I am just after some advice. I am having new meters fitted and been told they need to be earth bonded? I've attached a photo as my friend thinks this has been done but I need to know before I book an electrician, so any help is appreciated, thank you
  30. N

    supplementary bonding

    we are allowed to omit supplementary bonding on the 3 conditions (rcd, disconnection times and main bonding adequate ) if we have a plastic insert we may omit main bonding on water for example. would supplementary bonding have to be added as it no longer has main bonding ?
  31. Soulcraft Electric

    BISF (British Iron and Steel Federation) prefab houses and main bonding

    Carried out a couple of EICRs on BISF prefabs and on both there is no main bonding to the steel frame of the building. My scheme technical helpline advised that main bonding was not required. Just wondered what people's thoughts are here? These are NOT pictures of the actual lofts (the roof...
  32. S

    Industrial gas supply bonding.

    I've got to earth a new 50mm steel gas pipe. The pipe fitter didn't fit an earth stud to it and now he's gone. Am I just looking at a large earth strap or something else? Any ideas are welcome?
  33. C

    Parallel generator, earthing and bonding

    Hello, can anyone advise on bonding of extraneous conductive parts when supply is from a generator run parallel with distribution network? There'll b a 200kva generator supplying spray booths that have a gas supply to them. The metal pipes aren't underground but connect to tanks outside sitting...
  34. M

    Domestic Gas Bonding to MET or consumer unit

    sorry if this has been covered but I cannot find answers - 1st floor flat TNS supply from basement - the water is bonded at the stop cock within the flat to the consumer unit . The Gas enters in 2 places for cooker and boiler . Some "brightspark" has earthed this via a rod at the meter - does...
  35. D

    Domestic Gas meter earth bonding

    When running the 10mm Main Protective bonding to the Gas in a semi recessed gas meter box, how do you enter the box with the cable? The reason I am asking is: 1) The pipe sleeve for the gas pipe can not contain the earth as it is not 25mm separation. (yes I know it will attach to the pipe...
  36. Marcus Vaughan

    BS951 Bonding Clamp on the Incoming Supply

    Hi all, Just been to look at a job for a consumer unit changeout, checked the supply and, Not sure you can see it too well but TNS system with older earthing conductor in green kind of sweated onto intake (connection does not feel too good), but disconnected at the other end (goes into that...
  37. Gladius

    Faraday cage earthing.

    Hi there, We will need to earth a Faraday cage room in an experimental work, do we need to certify the job? Can it be only earthed into the plumbing pipes if available (Bonding?)? If there are no pipes around should we earth it into a mains circuit using a junction box or surface box for...
  38. edexlab

    Bonding Control panel

    Currently building a system for a PITA customer Did stage 1 last year ( I only did onsite install) They snagged and changed totally nonsensical things at a whim and my company let them Resulted in job being completed 4 mths late This year stage 2 only had 4 electrical snags versus 176 last...
  39. happyhippydad

    Understanding the new regulation regarding Main Bonding.

    Regulation 411.3.1.2 states .... Main bonding conductors shall connect to the main earthing terminal extraneous conductive parts. It then goes on to say... 'Metallic pipes entering the building having an insulating section at their point of entry need not be connected to the protective...
  40. AlmondSauce

    Bonding outside copper pipe

    We have a copper pipe running along a wall outside in the garden - it's used to supply a sprinkler system. (Inside the house it's plastic, there's a join to copper just before it comes outside.) Should it be bonded? It's not at present. All my knowledge of bonding comes from pipework running...
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