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Discuss Extraneous Parts Earth sizing in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. Neon Vagabond
    Offline

    Neon Vagabond Regular EF Member

    Location:
    Glasgow
    Customer wants to take power from an existing garage (with board) to supply a greenhouse, to be fitted with ip rated switchgear.
    The greenhouse is made of aluminium.

    Since this is an extraneous conductive part am i right in thinking that the aluminium frame would require a 10mm bond at least? (tncs supply)

    Garage is fed with a 4mm armour (3core)

    Should i still take the supply from the garage but run in a seperate 10mm earth from the house MET?
     
  2. Strima
    Offline

    Strima Electrician's Arms

    Location:
    St Neots
    Why not TT it?
     
    • Agree Agree x 1
  3. Neon Vagabond
    Offline

    Neon Vagabond Regular EF Member

    Location:
    Glasgow
    i dont know, ive always had a bad feeling about TT
     
  4. Neon Vagabond
    Offline

    Neon Vagabond Regular EF Member

    Location:
    Glasgow
    Im also not really sure whats down there
     
  5. Dave OCD
    Offline

    Dave OCD Forum Mentor

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    It isn't necessarily extraneous if mounted on a concrete plinth, I'd test it.
     
    • Like Like x 1
  6. Wilko
    Online

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    What's being put in the greenhouse? Maybe an IP rated outlet just outside it would allow use of garden tools etc.
     
  7. Neon Vagabond
    Offline

    Neon Vagabond Regular EF Member

    Location:
    Glasgow
    the guys wanting a light, lightswitch and 2 sockets. He says he plans on putting a 1kw heater in there as well (plugged in)
     
  8. Neon Vagabond
    Offline

    Neon Vagabond Regular EF Member

    Location:
    Glasgow
    not heard about this...
     
  9. Dave OCD
    Offline

    Dave OCD Forum Mentor

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    I'm surprised you're not aware, but if the metalwork tests at >22kOhms to earth then it isn't extraneous.
     
    • Agree Agree x 1
  10. buzzlightyear
    Online

    buzzlightyear please let me back in to the prison cell. Electrician's Arms

    Location:
    star command
    • Funny Funny x 3
    • Like Like x 1
  11. Neon Vagabond
    Offline

    Neon Vagabond Regular EF Member

    Location:
    Glasgow
  12. buzzlightyear
    Online

    buzzlightyear please let me back in to the prison cell. Electrician's Arms

    Location:
    star command
    bright eyes ..
     
    • Like Like x 1
    • Funny Funny x 1
    Last edited: Dec 5, 2018
  13. Baddegg
    Online

    Baddegg Still simmering Ken, not boiled yet buddy x Electrician's Arms

    Location:
    Portsmouth
  14. buzzlightyear
    Online

    buzzlightyear please let me back in to the prison cell. Electrician's Arms

    Location:
    star command
    what ,now I'm now on the floor p**ing my self laughing .
     
    • Funny Funny x 1
  15. Dave OCD
    Offline

    Dave OCD Forum Mentor

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    I'm sorry I don't know what else can be said.
     
    • Optimistic Optimistic x 1
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