bonding

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  1. 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...
  2. 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.
  3. 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...
  4. 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...
  5. 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...
  6. I

    No bonding, no work getting carried out?

    Evening all, My NIC inspector told me years ago "if there is no bonding in place, you're within your rights to switch off the electrical installation until works have been carried out!".... not sure if this is true? When asked by a customer to carry out a job which you give a cost for before...
  7. A

    Bonding gas and water

    Hi guys Does the earth Bonding HAVE to be done at the meter or can it be put on the gas inlet to the boiler in a utility room? Plans have changed and cables already run ? Also am I right in thinking that if water inlet is in blue pvc pipe Bonding isn't required even tho it is copper on...
  8. A

    EICR LOCAL BONDING FLATS

    I’m sure this has been covered a squillion times before but advice please. EICR on block of 5 flats all with separate electrical supplies & meters. One boiler serving hot water via one system to all flats. Main bond to water and gas on entry to building. There is no bonding locally within the...
  9. G

    Bonding metal studwork,

    HI all, I need to bond metal stud work on new build houses, 4mm from socket to an upright, uprights have roof baton for noggins, then socket screwed to the baton, does the bond need access for testing at all? I'm looking into metal noggins for continuity,i think it will be better, just...
  10. dodger421

    Main Bonding Puzzle

    Hopefully someone wiser than me can help explain some odd measurements I’ve taken at my own home. This is a long read, I’ve tried to give as much information as I can because I suspect I’m over thinking the problem and missing something obvious that’s causing insulated pipework to have earth...
  11. DPG

    Bonding of 2 gas pipes

    Morning all, and happy Friday! I feel I should know the answer to this one, but I'm not certain, even after consulting GN8. A friend of mine has a semi-detached house with two copper gas pipes entering, one for the cooker and one for the boiler in the loft. They join together outside and are...
  12. P

    Main water bonding and plastic pipe bends

    Hi guys, sorry if this has been asked before. I’m currently in a flat where the tenant queried the water bonding. There’s a 6mm green and yellow leaving the DB and goes to the gas meter as it’s clipped direct I can see it isn’t continuos and go to the water. There is also no other bonding...
  13. I

    Water Bonding

    Evening all, I'd guess that this is a common question but haven't been able to find anything on the forums regarding the 18th. Working in a shop and the water comes into the building in plastic, there is then 3 foot or so of copper pipe followed by plastic throughout the rest of the...
  14. N

    Do I need to upgrade my earth bonding under my sink to pass EICR?

    (Rented property) The current bonding under the sink is 6mm - the electrician said it has to be min 10mm in order to pass the EICR. Is this correct? It looks like the wire has been there since the house was built and electrician said he would have to take a new one from the fuse box and somehow...
  15. 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...
  16. B

    Code for bonding?

    Gas bonded with 10mm at front of flat, boiler at back of flat where a 6mm has been linked from it to an extraneous cold water pipe in bathroom. No other extraneous water pipes in flat. All continuity good but using the gas pipe as a conductor to link to water pipe. C3 for 6mm C3 for non...
  17. B

    Tray and basket bonding

    Hi all Regarding bonding of cable tray and basket. Is basket required to be bonded if only data cables installed on it ? plus bonding cable tray, best method i use it 6mm brass nuts and bolts with earthing straps. But brass nuts and bolts can be expensive, will roofing bolts and nuts be...
  18. S

    How how to bond existing in ground pool?

    Hello all, First post for me, a very frustrated DIYer whos leaving in a country (Czech Republic) where its near impossible to find an English speaking electrician who knows what they are talking about. My issue is that the company who installed our vinyl pool a few years back clearly didn't...
  19. A

    Confirming earth bonding continuity when cannot isolate supply

    Hi, just wondering how other sparks, go about confirming main earth bonding continuity when supply cannot be isolated, ze and pfc can be enquired wich is fine but what happens if you cant disconnect main bonding earth, is previous test results good enough to confirm?visual checks good enough...
  20. E

    Bonding and Mcbs

    If bonding raises all extraneous parts in a building under fault conditions to the fault voltage.How important is bonding if the mcb is already tripping the breaker in under 0.4 seconds if a healthy system.?

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