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Discuss Code cables in walls with metal partitions in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    Recent thread brought up C3 cables in wall of less than 50mm from surface without rcd or additional mechanical protection on a eicr.
    I would also C3 this however how do people feel about this if the walls were metal partions on the studs and not wood?
    Would you then be more swayed to a C2 incase penetration/damage on a cable also touched against the metal work making the wall 'live'?
    Thoughts please
    Cheers
     
  2. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    if metal studding, a C2 for me.
     
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  3. widdler
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    widdler Trusted Advisor

    Location:
    North East
    My take on it is..

    If cables can be subjected to vibration, movement then it would lean towards a C2.

    If insulation is holding it in position or its not not to be disturbed then it can lean to a C3.

    It's one of those observations where a better understanding on the use of the installation may sway the decision.
     
  4. Taylortwocities
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    Taylortwocities Electrician's Arms

    Location:
    Oxfordshire
    For an EICR, unless you have X-Ray eyes, it's unlikely that you would be able to inspect the method of support for cables inside the partition. You could only code it as C3.
    Maybe with a qualifying note as to the limitations of the inspection.
     
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  5. Wilko
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    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    IIRC one "famous case" was an unprotected cable in a metal stud wall. A plasterer's nail, electrical testing that didn't find it, and a later pipe leak resulted in tragedy. I'd C2 it.
     
  6. westward10
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    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

    Location:
    Northamptonshire
    I really don't buy this scenario because how would any amount of testing have indicated a nail penetration through a live conductor in that wall which was isolated from earth.This was an unfortunate set of circumstances. The jury were given the "evidence" and decided that adequate testing was not carried and blame was laid.
     
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  7. Wilko
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    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Agree with you completely.
    IMHO, I think that's one construction fault that can't be found with testing and it has caused a tragedy. Hence my personal choice of a C2 for OP question.
     
    Last edited: Jun 30, 2017
  8. spinlondon
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    spinlondon Trusted Advisor

    Location:
    Harlow Essex
    What type of cable?
    If it's SWA for instance, then no code.
     
  9. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    It was more regarding standard twin and earth
     
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