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Discuss Earthing a gas pipe in attached garage in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. PhilCapron
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    PhilCapron New EF Member

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    marlow
    My house has a PME earth system. The gas pipe in the garage has a 6mm earth wire already but I've been told this should be changed to 10mm.I'm having an EV charging point fitted externally which required an earth rod to be installed (32ohms impedance measured)-PME cannot be used with an external EV charging point. Would it be acceptable to disconnect the 6mm PME earth from the gas pipe and connect the 10mm cable to the EVSE earth rod?
     
  2. buzzlightyear
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    buzzlightyear Electrician's Arms

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    is the garage separate from the house !
     
  3. Pete999
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    Pete999 Trusted Advisor

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    If the GAS pipe in your garage is the incoming feed to your house, then you need to BOND it to the MET which will be at the entry point of the Electric cable and meter, you are not earthing the gas pipe you are bonding it to earth
     
  4. Pete999
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    Pete999 Trusted Advisor

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    No
     
  5. HandySparks
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    HandySparks Trusted Advisor

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    No. It'll be a bonding conductor (not an earth wire), which needs to be connected to the main earthing terminal near the incoming electrical supply, not a separate rod.
     
  6. Murdoch
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    Murdoch Electrician's Arms

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    I would say no on the basis the existing 6mm is running to the house CU / MET and the advice you have is that this needs to be upgraded to 10mm - back to the CU / MET.
     
  7. Leesparkykent
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    Leesparkykent You Rock Gmes Staff Member Trusted Advisor

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    Make the entire garage TT bond the gas in the garage to the TT system. The EVC point can then be connected to the TT system. Run a seperate 10mm bond from TNCS MET In the house to point of entry of the gas to the house. Assuming garage has own board and RCD.

    Edit: ignore this as I assumed it was detached from the house.
     
    Last edited: Aug 11, 2017
  8. buzzlightyear
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    buzzlightyear Electrician's Arms

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    what's the betting the garage is attached to the house!
     
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  9. Leesparkykent
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    Leesparkykent You Rock Gmes Staff Member Trusted Advisor

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    lol....I must admit I had assumed it was detached.
     
  10. Murdoch
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    Murdoch Electrician's Arms

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    I think the clue is in the thread title...
     
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  11. buzzlightyear
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    buzzlightyear Electrician's Arms

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    remember playhouse ,is it a round window or square window!
     
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  12. Wilko
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    Wilko Electrician's Arms

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    Hi Phil - let me paraphrase a sentance from the EV charging Code of Practice section 6.6 "when an EV charging point is supplied from a dwelling with PME, earthing and bonding require careful consideration". Then there's the EV section 722 in BS7671, another riveting read, no doubt.

    It sounds like your gas bonding was not up to scratch from a change to PME and so that just needs to happen. The design of the EV system is another thing, imho :)
     
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    Last edited: Aug 11, 2017
  13. Leesparkykent
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    Leesparkykent You Rock Gmes Staff Member Trusted Advisor

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    oops :oops:
     
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  14. buzzlightyear
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    buzzlightyear Electrician's Arms

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    upload_2017-8-11_17-51-0.png we will have to wait on this one!
     
  15. buzzlightyear
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    buzzlightyear Electrician's Arms

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    these threads are getting slower ever day we need to have count down clock.
     
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  16. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    tick tock. mouse ran up the clock.
    got his pants caught in the works
    paralysed his cock.
     
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  17. Rpa07
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    Rpa07 2000 posts - only 46379 behind Telectrix! Electrician's Arms

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    Oh, that's why you are 'top poster of the month' - still beats the drivel that westy used to come out with though!
     
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  18. westward10
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    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

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    Would you like to enlighten me with examples of this drivel.
     
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  19. Rpa07
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    Rpa07 2000 posts - only 46379 behind Telectrix! Electrician's Arms

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    Sorry westy. Just trying to make Tel feel better about being 'top poster of the month' not everyone can handle the responsibility whereas YOU, now you excel at being TPOTM.
     
  20. westward10
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    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

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    Top Poster way out of reach now.
     
  21. Dave OCD
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    Dave OCD Electrician's Arms

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    Playschool not Playhouse ya silly ar5e and it was round, square or arched window. :D
     
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  22. Rpa07
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    Rpa07 2000 posts - only 46379 behind Telectrix! Electrician's Arms

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    More important things going on?
     
  23. Rpa07
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    Rpa07 2000 posts - only 46379 behind Telectrix! Electrician's Arms

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    @RSE@RSE is a member - how funny is that! Or unfortunate however you look at it!
     
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  24. Andy-1960
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    Andy-1960 Electrician's Arms

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    The clue is in the title of the thread!!!
     
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  25. Pete999
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    Pete999 Trusted Advisor

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    I'm so detached I don't care
     
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  26. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    she was only the welder's daughter, but she had acetylene legs.
     
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  27. Pete999
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    Pete999 Trusted Advisor

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    Gettin slow Tel a set of lean legs, message to myself, leave that bleedin wine alone took me 3 mins to understand what you meant, or is it Alzheimers?
     
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  28. westward10
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    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

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    You see.
     
  29. Rpa07
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    Rpa07 2000 posts - only 46379 behind Telectrix! Electrician's Arms

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    I get ya!
    But I don't feel ya!
     
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  30. Pete999
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    Pete999 Trusted Advisor

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    I need my night time meds
     
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  31. Dave OCD
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    Dave OCD Electrician's Arms

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    The version I'm familiar with ends higher up than legs.:D

     
  32. Wilko
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    Wilko Electrician's Arms

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    Glad you do, as I clearly need more red to keep up here ...
     
  33. Pete999
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    Pete999 Trusted Advisor

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    That's filthy, well last time I looked it was:p
     
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  34. PEG
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    PEG Trusted Advisor

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    ...Well just run a damp flannel over it...and continue ;)
     
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  35. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    farmer goes out into his cow field @ 5 o'clock on a bitter winter morning. cows are all lying down, frozen stiff, no life at all. panicking the farmer is lost for what to do when an old lady walks by.

    she says to the farmer "what seems to be the matter?"
    farmer replies "All my cows are dead, frozen stiff"

    walking over to the first cow, the old lady breathes into it's nose. She repeats this with all 200 cows.

    Slowly but surely, all the cows recover and walk towards the field gate, heading for the milking shed.

    "Bloody 'ell" says the farmer. " I must pay you for saving all my cows"

    "No need" she replies.

    "Well, what's your name , so I can sing your praises around the village" says the farmer

    "Thora Hird" she replies.
     
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  36. Rpa07
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    Rpa07 2000 posts - only 46379 behind Telectrix! Electrician's Arms

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    Not one of those buttons described how I felt when I finished reading that joke!
    We need one that groans!
     
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  37. Midwest
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    Midwest Electrician's Arms

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    Oxfordshire
    I have just quickly read threw this thread before I retire and get the feeling that none of you can actually answer the OP's question, nor can I. Lets see what tomorrow brings
     
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  38. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    you retiring mid? didn't think you were that old.
     
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  39. Midwest
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    Midwest Electrician's Arms

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    Oxfordshire
    I don't have a mid afternoon nap like you do :)
     
  40. Wilko
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    Wilko Electrician's Arms

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    Wilko Electrics
    (gentle cough) ... Pete says no with reasons back in post #3 ...

    It's even more no with the EV charging point that's in play. There are couple of ways to proceed with a domestic EV design with PME at the house, and one of them (at least) would be busted with the OP proposal.
     
  41. Midwest
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    Midwest Electrician's Arms

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    Oxfordshire

    Is the gas pipe metal or extraneous, can see that in any of the OP's posts?
     
  42. Midwest
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    Midwest Electrician's Arms

    Location:
    Oxfordshire
    Haven't the foggiest about EVCI, but I do see that reg 722.411.4.1 is so ambiguous as regards PME, that the grown ups have decided to clean it up a bit with the forthcoming 18th.
     
  43. PhilCapron
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    PhilCapron New EF Member

    Location:
    marlow
    The gas pipe is metal and the garage is attached.
    HTH.
    Phillip Capron.
     
  44. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    As I suspected.

    The gas bonding needs to be upgraded to 10mm back to the fuseboard or MET.....
     
  45. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    hum.... many of our regs are ambiguous.........................

    Still want them to add a definition of "accessible" to the regs.
     
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