Page 86 - IS-Rayfast Catalogue - Issue 9, 2017
P. 86

Wire and Cable
      Custom Cable Designs
      4. Design Options
      Multi-conductor cables

  1   In addition to those choices already covered
      there are a number of further design options
      and components available to cable designers.
  2   Careful consideration must be given to the
      selection of these options and components
      to achieve the right combination of physical,
  3
      chemical and electrical properties and to
      ensure that the finished cable is perfectly
  4   designed for its intended application.
      Coiled Cables
  5   Coiled or extensible cables are utilised for
      applications needing a combination of a high
      degree of flexibility, space constraints and the
  6   need to be extended and retracted.    Fillers
                                            A non-functional component used to fill large
      The ability to supply cable designs as
  7   extensible cables using a wide range of coil   interstices within a cable, thus providing a
      diameters lengths facilitates the provision of   concentric construction. A ‘filler’ can be a
                                            solid core of polymer made from the same or
      cable for equipment such as headsets and
  8   communication equipment for example.  similar material as the cable components.
                                            Lay Length
      Tape Wrap
  9                                         A term used in cable manufacturing to denote
      This option of a spirally or longitudinally
      applied tape material wrapped around   the distance of advance of one member, or
      insulated or uninsulated wire used as a   a group of spirally twisted members in one
  10                                        turn, measured axially. The lay of any helical
      mechanical barrier and a means of bundling
      the multicore cable.                  element of a cable or conductor is the axial
                                            length of a turn of the helix of that element.
  11 Tape wraps are often used between wire   Altering the lay length of a cable can result in
      conductors and braided screens.       a change in the cables flexibility.
  12
                                            Binder
                                            A spiral wrapping of a thread to hold together
  13                                        the members of a cable as an alternative to a
                                            tape wrap.
  14                                        Strain Relief
                                            A tread or rope, usually manufactured from
  15                                        Kevlar, located down the centre of a cable to
                                            provide strain relief to its wire components
                                            after installation.
  16
                                            Drain Wire
                                            An uninsulated conductor laid over the
  17                                        components of a foil-shielded cable and used
                                            as a ground connection.
  18



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