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Cable table which column to use

Baldyhugh
Hi


Im currently doing a bit of circuit design and am a bit rusty. I’m planning to use a 3 core swa for a single phase circuit. Do I choose the 2core cable single phase column in The regs book current capacity tables even though im using a three core cable or the three or four core cable column? Some of the tables show a little asterix denoting ‘with or without a protective conductor’ which would help in my instance, however table 4d4a doesn’t show this. 

Thanks in advance

Peter
  • 0
    Hi Tatty


    my query was with Using a three core cable with single phase as the table only shows two core for single phase or three or four core for three phase
  • 0
    Baldyhugh:

    Thanks for your replies, 


    On another note, in debating whether to use SWA or hi-tuff for a job I’m currently designing. As hi-tuff( that’s what it’s called in this area, I know others have different names for it) is basically pvc insulated cores with a tougher outer sheath, would table 4D2A be the correct one to use?


    Thanks




    Doncaster cables told me to use table 4E4A for their Tuff sheathed cable, and Draka cables, I seem to recall, told me they no longer do what was their Hi-Tuff cable, but call them and confirm.


    F


  • 0
    I'd say 4D2A normally. 4E2A might be appropriate if the cable has thermosetting (rather than thermoplastic) insulation AND you're happy to run it at 90 degrees - but most terminals preclude that of course.


    4E4A is for 90 degree armoured - and would seem an "interesting"  choice for an unarmoured cable like HiTuff, but I suppose might be justified if the manufacturer was confident of a higher rating without increasing conductor temperature (perhaps they're trying to sell into the SWA market and don't want to tell customers that they might occasionally have to go up a size).


       - Andy.
  • 0





    In case I'd imagined it, it's near bottom left of the page http://www.doncastercables.com/cables/6/24/SWA-and-Mains-Distribution/XLPE-Insulated--PVC-Bedded-and-Tuf-Sheathed-Non-Armoured-Cables/
  • 0
    I wonder what it means by the cable is “generally” manufactured to BS5476 Table 8?
  • 0
    it may be a way of saying that the bits that are important for that bit of the regs, say the wire stranding and cross-sectio,  may meet the BS but other aspects like the  choice of jacket colours or something may not.
  • 0
    Also ( edit: cross out BS 5476)  BS 5467 is for armoured cables, so they are saying it is like SWA but without the SWA.
  • 0
    Perhaps they mean it compiles with BS 5476 apart from if it's manufactured during the night shift when Steve is in charge?
  • 0
    BS 5476??


    Specification for program network charts


    Status : Withdrawn   Published : June 1977

     


       - Andy.
  • 0
    AJJewsbury:

    BS 5476??


    Specification for program network charts


    Status : Withdrawn   Published : June 1977

     


       - Andy.


    Oops. That should have been BS 5467 obviously ? That's what the datasheet says.

    (btw excuse the shouty looking text. I've pasted below but not sure how to format it?)



    BS 5467:2016



    Electric cables. Thermosetting insulated, armoured cables of rated voltages of 600/1 000 V and 1 900/3 300 V for fixed installations. Specification



    Status : Current   Published : April 2016


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