main bonding

  1. D

    Running main bonding outside

    Had a CU upgrade just over a year ago but the electrician didn't upgrade the main bonding to the water from 6mm to 10mm. I don't know his reasoning, wasn't there for the work and never chased it up. I'm having my garage converted so access to the CU is going to be restricted after the ceiling...
  2. HappyHippyDad

    Main bonding..... yet again!

    Afternoon all.. Settling down to a fancy coffee from the new fancy coffee machine and as you do on a sunday afternoon I started thing about bonding :). Quite often the kitchen fitter, DIY homeowner etc has built around the Main bonding connection for the water and it is neither visible or...
  3. T

    Main Bonding !!!!!!!!!!!!!!!!!!!!!!!!

    Had the electrical consultants out to site today to look around and he wants us to bond the steel girders on each floor around the lift, this is just a isolated piece of metal supporting the concrete floor where they cut a hole for lift.Also, the gas is a new supply (wall surface meter box)...
  4. captaincaveman

    Main bonding with metal water incomer but plastic installation

    Hi. Quick question. Domestic property recently rewired by niceic spark. Water incomer is metal for about 3 feet into the property (celar) but the rest of the water installation is plastic. Looks like during the rewire the water bonding was broken on purpose. Does it need to be bonded again? (My...
  5. B

    Main bonding flow and return to oil boiler

    Hi this is pickling my head and any advice is appreciated. I have a TNCS system. I have an external oil boiler fed from the house in a detached garage. The main water in the house and the flow and return from the boiler are all bonded back to the house MET from within 600mm of where they...
  6. P

    Main bonding problem again

    Hi been to a job wants a shed wired, about fifty meters away from the house, my concern is the bonding to the services, not good and near impossible to route to within 600mm of the stop cock/gas meter, my question is could i bond the pipes at the upstairs meter? I know what the regs state but...
  7. cliffed

    Main bonding Conductor

    Just your thoughts on this one,recently did a bit of work at a factory unit,there are several units being used by a company. The electrics are really pretty bad,my concern is main bonding of structural metal work,can't really see any Earth conductors to these. In the one area there are steels...
  8. HappyHippyDad

    Main bonding made to separate earth rod?

    Evening all.. I have just been to a clients house to quote for some work and when checking the Main bonding I noticed that it just had a 10mm attached to the gas pipe and then straight into a separate earth rod, it was the same for the water (had it's own earth rod). I realise that this would...
  9. cliffed

    Main bonding

    Just finishing workshop,no external services to bond,but wondering what to do with the steel framework,this is not continuous & main beams/rafters to the building are wooden,ceiling panels are corrugated plastic. Wondering do these need bonding,being they are not bolted or connected together.
  10. Dave301

    Main Bonding

    House has had gas installed. Meter is outside of property at front. The box is not attached to the building and the gas pipe enters the property under the floorboards. The pipework goes to the boiler at the rear of the property under the floor the whole way. Is it OK to put a bonding clamp...
  11. D

    Main bonding

    Evening all, Have kind of over thought this one until I'm not sure any more! Input welcome. Have been installing a supply to a machine, and gathering the necessaries for the EIC today I noted that the bonding is undersized. It's a 400a incomer with 185mm tails into an MCCB panel DB. TNCS....and...
    • Deleted member 9648
    • Thread
    • bonding main main bonding
    • Replies: 19
    • Forum: UK Electrical Forum
  12. G

    Main bonding to water

    I have a query regarding main bonding to water. If the stop cock is under a wooden floor and not accessible is this to be noted on the test sheet as LIM and advise this is done. Also when quoting for works and the water main is not bonded, can we carry out other works if the client does not...
    • Ges123
    • Thread
    • bonding main main bonding water
    • Replies: 13
    • Forum: UK Electrical Forum
  13. N

    Main Bonding Conductor routing method

    Further to my recent post regarding main bonding. When bonding the incoming water at the other side of the property, what is acceptable when running the cable down a wall due to be plastered? Due to concrete floor and a terraced house, the only way is to run the cable up underneath...
    • Noob2013
    • Thread
    • bonding conductor main main bonding method routing
    • Replies: 8
    • Forum: UK Electrical Forum
  14. HappyHippyDad

    No main bonding seen but good continuity.

    Evening.. I have just completed an EICR. The incoming gas pipe has been hidden behind kitchen units. I have dismantled the plinths, emptied the cupboards and used my inspection camera all to no avail. I cannot see any main bonding. I can just get my hand through an inspection hole cut in the...
  15. D

    New to Forum. Main Bonding conductor r2 readings.

    Hi New to the Forum here. I am a qualified Electrician however inexperienced due to spending 4 years in the army since finishing my apprenticeship. Trying my hardest to get back to the standard that I should be at. I have sat and passed the 17th edition but currently not got 2394/5. Plan to...
    • David Nicholls
    • Thread
    • bonding conductor main main bonding new readings
    • Replies: 2
    • Forum: The Welcome Forum
  16. C

    main Bonding of Water Pipe - supply not unique to property - Potential difference?

    Hi, I understand according to 411.3.1.2, that main metalic services incomming must be bonded to MET. but what if the water pipe is shared from another property? The premises has its own electrical supply, but the incoming water is not individual but shared. I believe i should still Bond. Could...
  17. C

    Main bonding and new regs?

    Hi all. I have purchase my new On-Site Guide (BS 7671:2008 Wiring Regulations, incorporating Amendment 3:2015) but still hasn't arrived yet. So, maybe someone here is likely to know. Are there any changes to main bonding conductors? Is the minimum still 6 mm CSA? Many thanks. Albert
  18. F

    TT system main bonding CSA?

    Rewiring an older TT terraced property. There is currently 6mm earthing from the rod, and also as main bonding to gas and water. I (was!) confident that 6mm main bonding met the requirements of BS7671, but a fellow Part P installer insists that I need to upgrade the main bonding to 10mm, but...
  19. G

    Unsure about main bonding

    Hello. Been asked to add bonding to gas, as British Gas has advised customer gas has no bonding. Gas meter shows no signs of bonding, cannot see bonding to water either. They have a shower cu which has a 10mm2 earth to it from the main earthing terminal - no other earth cables leave...
    • golfpaul
    • Thread
    • bonding main main bonding
    • Replies: 54
    • Forum: UK Electrical Forum
  20. polo1

    Main bonding, what to do....

    A second floor flat, hi spec decoration and finishes, and the incoming water supply (in copper) is on the other side of the flat from the CU which is to be replaced. There is currently no main bonding, but the gas will be relatively straightforward. The floors are all done in hardwood, the...
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