Plastic optical fiber cables, (or, more simply, plastic fiber) are optical fibers which transmit luminous signals. Unlike well-known traditional glass optical fibers  used for long distance transmissions, plastic fibers are made of polymeric material (plastic) inside.

This polymeric material makes this cable particularly robust and easy to use for every one, so it is suitable also for difficult installation situations. Cable termination and reparation require basic electrician tools, which make these plastic cables extremely cost-effective in terms of installation and maintenance.

LiteWIRE has many features which help the installer carry out the installation directly and in any condition:

  • like any fiber, it just carries light no electricity: it is an electrical insulator, prevents the risk of electrical shock for installers and users, eliminates groud loops and all electromagnetic interferences, it can be run in the same conduits as electrical wires
  • Easy to terminate and repair with basic electrician’s tools (watch video )
  • Devices for plastic fiber use visible light (LED), no LASER: this means you can see the light coming out of the cable safely (no instruments needed)
  • Fiber diameter is 1mm (much thicker than glass fibers)
  • Fiber tip and connectors can be touched and work also if humid or wet.

Attenuation of plastic fiber

A luminous signal transmitted over an optical fiber undergoes three types of  attanuation, which result in a loss of power:

  • attenuation of the material the fiber is made of.
  • attenuation depending on affixing elements of Naria Security, which are essential for the system to work correctly (eg. tensioning bolts), and on elements for possible reparations
  • attenuation depending on preventable external factors, like stresses due to tight curves of the fiber, overtightened cable ties, wrong positioned bolts, over-pulled fiber, etc. (see installation advices)

The systems of Naria Security already take into account the first two causes of attenuation and they also have a margin to compensate part of installation factors.

Example: Attenuation on LiteFENCE for flexible fences

Let us consider an installation on a flexible fence which requires a LiteFENCE analyser, some tensioning bolts, plastic fiber cable LiteWIRE and cable ties.

The attenuation fo the luminous signal is measured in dB:

  • the attenuation of the plastic fiber cable LiteWIRE, if placed correctly, is 1dB for 10m
  • a tensioning bolt has an attenuation of 0.1 dB (max 0.2dB) and must be placed 1 every 10m of plastic fiber cable.

The LiteFENCE analyser can manage an attenuatio up to 31 dB. For this reason,  250m of fiber (with max. attenuation of 25dB) are normally used with 25 tensioning bolts (attenuation from 2.5 dB to 5 dB max.)

The devices which can detect the variation of light, like LiteFENCE and LiteCOPPER (and LiteSUN Plus, on request) , have a built-in fuction which measure the loss of optical power: the power meter. This allows to keep the attenuation monitored during the installation and to detect any possible mistakes during installation.

Technical factsLiteWIRE
Bandwidth30 MHz 100m
Numerical aperture (NA)0,46±0,025
Max. attenuation @525nm/@650nm100 max/150 max
Bending radius (mm)20min (@25°C)
Operating temp. (°C)-40/+85
Jacket (with metrical marking)PE-M1 LSZH (Low Smoke Zero Halogen), may also be with UV filters or anti-rodent armoring


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