bonding

  1. W

    Checking proper bonding and grounding for office trailer w/generator power

    Hey guys and gals. We bought a small office trailer that is wired up. It's never seen mains power and uses a generator disconnect (220). I read up on the myriad of code situations for bonding and then grounding, neutral switching etc. and came to the conclusion this would fall under separately...
  2. S

    Do you need cross bonding

    Do you need cross bonding. Main gas and water incoming is plastic and all circuits are on RCBOs
  3. M

    Main bonding questions

    Probably a basic question In an installation with pipework or cable ladder that's not extraneous as such but is connected to earthed metal What's the logic for not main bonding it as the metalwork can surely introduce a potential in a fault situation?
  4. Baker1988

    Does this need to be bonded

    Did a eicr on a upstairs flat, there is 1 main bonding cable from the consumer unit, the gas pipe comes from the gas meter outside and up the wall and straight through the loft to the other side of the flat and down to the boiler. the gas bonding goes out the db and up to the loft then across...
  5. M

    UK Selecting bonding conductor size

    This is a question (or discussion probably) regarding selecting the main earthing conductor, and subsequently the main equipotential bonding conductor sizes in a TNCS installation. We are fitting a replacement consumer unit only. The property currently has 4mm bonding cable installed to gas and...
  6. J

    BONDING METAL WORKTOPS

    Kitchen in Care home. All metal surfaces. No bonding and no earth on test. RCBOs in DB. Does this still need bonding????
  7. Mike57

    Grounding and bonding swimming pool pump

    Need some help please. Got a brain teaser for my first post. My pool pump motor cratered over 4th of July. It was working fine and started to sound like it had gravel in it. I turned it off at the timer to backwash and the breaker tripped. She was locked up. Since it was 8 years old I took it to...
  8. E

    EICR question - gas bond off main TNS

    Hi all, is it acceptable or was it in previous regs if not anymore? To take the gas bond straight off the TNS connection shared with main Earth? See pic. Thanks Paul
  9. T

    Bonding problem in restaurant

    Im an apprentice spark and have been sent to look at some bonding work at a restaurant as apparently staff have occasionally been getting shocks when they touch across metal counters. The bonding has been cut in some parts but when i trace it back rather then going to the 3 phase board it has...
  10. D

    Bonding to domestic water pipe (plastic)

    Good afternoon one and all. I, like many non-electricians are having issues regarding the need to have domestic water pipes (plastic entry to the property) bonded prior to an EV charger being installed. I have read a number of articles on this forum which quickly leave me behind with the...
  11. N

    need for a fused switch for boiler / and boiler earth cross bonding

    hi there as i write this i realise i have 3 interconnected questions about fused switches; two relating to my boiler (hope its not to cheeky to ask 3 questions all in one go :-) ) Question1: i have a radial circuit 1.5mm cable on a 6amp fuse from my consumer unit straight to the boiler where...
  12. S

    Am2 question on bonding and ir test

    Hi, I have a couple of questions from the am2. The install bays have the cutout fuses in a adaptable box with just a banana plug on the earth. This then acts as the met up in the cu, should I disconnect at the cu and test down to the banana plug for continuity, like for the main bonding? Or keep...
  13. W

    Queries on main bonding

    Just want to know everyone’s approach to testing bonding within houses. I do a lot of EICRs, and I would say more times than not I can never get access to the water bond as the stopcock isn’t accessible. Now in this instance what I’ve been taught since my times been out is to test at any exposed...
  14. Yp510n

    continuity test on a protective bonding conductor

    Hope i find someone who can help me with this one. I have this question on an exam: A continuity test on a protective bonding conductor gives a result of 15ohms. What possible reasons for the result and what actions (if any) that should be taken? My answers where: -wrong size conductor shows...
  15. W

    Bonding gas and water

    is it okay to bond the gas and water at the boiler?? Gas meter is tricky to get to, was going to just take a 10mm to water pipe at boiler and just loop across to gas supply at the boiler
  16. R

    Daisy chained earth bonding cables

    The earth bonding cable has been daisy chained to 3 gas meters (the conductor has been cut at each earth strap). Is this satisfactory?, will it pass an inspection ok ?
  17. E

    Rebar bonding for insulated monolithic cement slab

    Hello! I am in the planning stages of a new dwelling construction. The foundation will be a monolithic cement pad with rebar. Based on my research, I am fairly certain that I need to ground the rebar within the slab. The slab will have rigid insulation under it and will have a vapor barrier...
  18. A

    Earth Bonding - LPG Pipe That Does Not Go Underground

    Hi, Our cooker is LPG, fitted on the inside of an outside wall if that makes sense. The gas pipe runs internally then through the wall to the regulator and changeover unit mounted outside, around 4' off the ground. The pipe doesn't go underground at any point. My understanding is that it...
  19. littlespark

    Brain fart - bonding gas from cylinders

    Does a copper gas pipe, coming into the house require bonding when the pipe is being supplied by propane cylinders, via rubber hose. Doesn’t go underground at any point. The water pipe is bonded, and therefore connected to gas at the boiler, which is at the point of entry of the gas…. Can’t...
  20. N

    Gas meter with plastic supply pipe - earth bonding worthless?

    A 'Sunday challenge' for the qualified electricians.... Can anyone explain why a built-in gas meter housing box that is located 600mm above a block paved driveway, with a plastic (Polyethylene - MDPE) supply pipe and no extraneous conductive part, could result in a dangerous potential...

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