Adding mains and lighting circuits to 1st floor radials

Discussion in 'Electrics UK' started by loftconverter2011, 12 Apr 2011.

  1. loftconverter2011

    loftconverter2011

    Joined:
    12 Apr 2011
    Messages:
    13
    Thanks Received:
    0
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    Thanks for that.

    I have done the measurements (sheathing and conductor) and indeed it appears to be 4mm.

    Sheathing is 11.9x6.25mm (snug) and it's multistrand cable at around .85mm in diameter per strand (or as near as I can measure it) which adds up to 2.87mm right? It may be slightly less as I didn't want to compress the bundle.

    The sheathing also has the number '4' on it's own along the the 'Basec BS6004 (2006)' data.

     
  2. ban-all-sheds

    ban-all-sheds

    Joined:
    27 Aug 2003
    Messages:
    69,782
    Thanks Received:
    2,858
    Location:
    London
    Country:
    United Kingdom
    OK - so that's what you are going to do.

    When you applied for Building Regulations approval, what did you say you were going to do? When they gave you approval, what did they think you were going to do?




    Wrong.

    How did you get from 0.85 to 2.87?

    (7 x 0.85mm dia is 4mm², I'm just wondering what calculation you thought you were doing)
     
  3. Sponsored Links
  4. holmslaw

    holmslaw

    Joined:
    12 Dec 2006
    Messages:
    5,841
    Thanks Received:
    400
    Country:
    United Kingdom
  5. loftconverter2011

    loftconverter2011

    Joined:
    12 Apr 2011
    Messages:
    13
    Thanks Received:
    0
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    The loft conversion company did all the structural work (eventually, after much to and fro) and roofing/cladding. I have done stud walls, insulation, floors, fire doors, windows etc.

    The BC people have agreed that I can route the cables through prescribed voids built into the stud wall designs and have an electrician connect/test the installation with BC returning to inspect the cable and connection/certification on completion.

    Basically I am doing the donkey work and routing the cable/chopping in the box holes etc, but that is the extent of it. My enquiries here are purely to determine the best points to tap in and begin the route.

    My fault. I interpreted the site instructions wrong (too eager at 7am I guess) and halved the figure.
     
  6. Sponsored Links
  7. ban-all-sheds

    ban-all-sheds

    Joined:
    27 Aug 2003
    Messages:
    69,782
    Thanks Received:
    2,858
    Location:
    London
    Country:
    United Kingdom
    Fair enough.


    You really should be asking the electrician who you're expecting to inspect/test/certify....
     
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page