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

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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