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Sub Main in Notched Joists. Your Opinion Please.

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Here we have a 16.00mmm2 T&E cable installed many years ago in a house, and it supplies a recently renewed consumer unit in an annexe. The cable runs under the first floor boards in notched  wooden joists. The boards are about 15mm thick. There is no mechanical protection apart from the wooden boards. The cable runs centrally to the floor boards  in the notched joists.


What is your opinion about leaving the cable where it is? It is backed up by a 60 Amp fuse in a switch fuse. There is no R.C.D. protection for the sub-main cable.


Z.


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  • 0
    Weirdbeard:
    Chris Pearson:



    were you doing an EICR, it would be C3.


    On the whole, I think better for the structural integrity of the house to leave it where it is; but if you are feeling energetic, you could drill some holes (1/2"?) through all the joists and re-site it.


     


    Hi Chris, it would be an unusual code for the majority of EICRs limitations do not include lifting all floorboards to inspect cable routing! 


    BTW, are you using a bit and brace to drill holes? 




    No, but Zoomy seems to have them up already.


    In tight spaces, I have a wee auger (mentioned in the old forum IIRC) which I can drive with a 1/4" socket. It works well, but after 3 or 4 joists, it is apt to give me a blister on the web between my thumb and index finger. I suppose that I could wear gloves! ?


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  • 0
    Weirdbeard:
    Chris Pearson:



    were you doing an EICR, it would be C3.


    On the whole, I think better for the structural integrity of the house to leave it where it is; but if you are feeling energetic, you could drill some holes (1/2"?) through all the joists and re-site it.


     


    Hi Chris, it would be an unusual code for the majority of EICRs limitations do not include lifting all floorboards to inspect cable routing! 


    BTW, are you using a bit and brace to drill holes? 




    No, but Zoomy seems to have them up already.


    In tight spaces, I have a wee auger (mentioned in the old forum IIRC) which I can drive with a 1/4" socket. It works well, but after 3 or 4 joists, it is apt to give me a blister on the web between my thumb and index finger. I suppose that I could wear gloves! ?


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