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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
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    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
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    Strima Electrician's Arms

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

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

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

    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
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    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
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    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
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    Neon Vagabond Regular EF Member

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

    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 still kicking sand, before pushing up daisies . Electrician's Arms

    Location:
    star command
    • Funny Funny x 3
    • Like Like x 1
  11. Neon Vagabond
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    Neon Vagabond Regular EF Member

    Location:
    Glasgow
  12. buzzlightyear
    Online

    buzzlightyear still kicking sand, before pushing up daisies . Electrician's Arms

    Location:
    star command
    bright eyes ..
     
    • Like Like x 1
    • Funny Funny x 1
    Last edited: Dec 5, 2018
  13. Baddegg
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    Baddegg Still simmering Ken, not boiled yet buddy x Electrician's Arms

    Location:
    Portsmouth
  14. buzzlightyear
    Online

    buzzlightyear still kicking sand, before pushing up daisies . 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
    Online

    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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