Shower Cable - to be 6mm2?

Discussion in 'Electricians' Talk' started by Leoric, Jan 12, 2007.

  1. ban-all-sheds

    ban-all-sheds New Member

    p228 <u>is</u> where Table 4D5A is...

    And what has the building construction method got to do with which cable type you use?
  2. X

    X New Member

  3. X

    X New Member

    1) 4D2A is not the data for flat twin & earth cable.

    Oh
  4. X

    X New Member

    building construction method got to do with which cable type you use

    Nothing.... but it has a lot to do with the values that correction factors are applied to when determining cable size.
  5. ban-all-sheds

    ban-all-sheds New Member

    Yes, but you look up the installation method in 4A1, and then once you know that you use the appropriate column in the appropriate cable-type table..
  6. Ant1981

    Ant1981 New Member

  7. X

    X New Member

    you use the appropriate column in the appropriate cable-type table..

    Indeed so ... and the appropriate cable-type table is (for std T&E) ?

    You can even use the one in the OSG and then look at the blue numbers on the right hand side
  8. Part P Inspector

    Part P Inspector New Member

  9. 2 wheeled ant

    2 wheeled ant New Member

    Page 126 OSG table 4D5A is T&E, 6mm is max 47amps normally in a modern insulated house a good guide is 40amps
    Ant
  10. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    Mind if I laugh ?

    :D:D:O:D:^O:^O



    Mr. HandyAndy - really
  11. X

    X New Member

    Page 126 OSG table 4D5A is T&E,

    Not saying it isn't.... but it sure aint the correct table to use in normal circumstances
  12. ban-all-sheds

    ban-all-sheds New Member

  13. X

    X New Member

    For the normal constructed dwelling it may be prudent to use the correct table found on page 222 4D1B
  14. ban-all-sheds

    ban-all-sheds New Member

    Why would it not be the one to use in normal circumstances?

    And if not, what circumstances would lead you to use a different table, which has different ratings because it is for <u>a different type of cable</u>?
  15. X

    X New Member

    A copy and paste from an old IEE wiring matters..

    THERMAL AND SOUND INSTALLATION
    One of the features of a modern dwelling is the
    requirement in Parts E and L to meet the thermal and
    sound deadening requirements of the Building
    Regulations. The IEE recently carried out some work
    to determine specific ratings for twin with earth
    cables when insulated in a thermally insulated wall
    see table 4D5A of BS7671, table 6F of the On Site Guide
  16. X

    X New Member

    Hellllooooooo....



    Echo



    Echo



    Echo
  17. fooman

    fooman New Member

    Mind if I laugh ?

    :D:D:O:D:^O:^O



    Mr. HandyAndy - really

    well either share the joke with us all thats so funny or contribute something usefull to the disussion...

    Or perhaps you know nothing again :^O

    Mr Fooman - Really Really Really
  18. Part P Inspector

    Part P Inspector New Member

  19. ban-all-sheds

    ban-all-sheds New Member

    4D5A is the table for flat twin & earth.

    That is why in table 4A2, if you look up "PVC insulated and sheathed flat cable" it tells you that the applicable current rating table is 4D5.

    That is why when you look at table 4D5A it is headed "..pvc insulated and sheathed flat cable"

    That is why when you look at Amendment No 1 2002 to BS 7671, it says:

    The Electrical Research Association were asked to measure the rating of the standard UK
    flat twin with earth insulated and sheathed cables. The cable ratings given in BS 7671
    were not derived from the direct measurement of this particular type of cable. The
    rating tables in the International and Cenelec and British Standard (7671) are based on
    typical type tests, and in the case of table 4D2A, on round cables. The results of the
    ERA&#146;s work are published in a new table 4D5A.


    How you can say 4D5A is not the table to use for flat twin and earth cable?
  20. MJA

    MJA New Member

    16mm2 on a 11kW shower......ferk off

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