IEEE 1428-2004 pdf download IEEE Guide for Installation Methods for Fiber-Optic Cables in Electric Power Generating Stations and in Industrial Facilities
1.Overview
1.1 Scope
This guide is intended for cables designed for use in power generating stations and industrial facilities, inboth the outside plant environment and indoor applications–the latter with adequate consideration forrequirements of the National Electrical Code”(NEC)(NFPA 70′).
t is not the intention of this guide to establish requirements for cables designed for installation in a highvoltage environment, such as optical ground wire and all-dielectric, self supporting. These applications arecovered by other IEEE documents (IEEE Std 1138M and IEEE Std 1222TM)
1.2 Purpose
This document is intended to provide guidance for the selection, application, and installation of fiber-opticcable in power generating plants and industrial facilities. The selection and application of fiber-optic cablein these facilities differ in many respects from conventional telecommunications and local area networkLAN) installations. Those issues, which require special consideration, are identified and discussed.
2. Normative references
The following referenced documents are indispensable for the application of this guide. For datedreferences. only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments or corrigenda) applies.
IEEE Std 1222TM,IEEE Standard for All-Dielectric Self-Supporting Fiber Optic Cable.
NFPA 70,National Electrical Code”(NEC).
3. Definitions
For the purposes of this guide, the following terms and definitions apply. The Authoritative Dictionary ofIEEE Standards Terms B97 should be referenced for terms not defined in this clause.
3.1 all-dielectric: An optical fiber cable construction having no metallic or conductive components.
3.2 blown fiber: A term describing a system that uses the force of moving compressed gas to carry bare orspecially coated fibers or fiber bundles into small, flexible tubes. Long installed lengths are possiblewithout the need for splices or lubricants and without the need to apply pulling tension to the fiber. Suchsystems provide a high degree of flexibility. Installed fibers can be blown out and new fibers blown in.Tube raceways can be reconfigured to facilitate modifications.
3.3 chromatic dispersion: The process by which a pulse traveling in a fiber is distorted (broadened) as ittravels along the fiber core
3.4 critical angle: The maximum angle of travel in the core of an optical fiber, which will result incontinued propagation of light through the core. Light that strikes the core at an angle greater than thecritical angle will pass into the fiber’s cladding structure and be dissipated.
3.5 equilibrium modes distribution (EMD): The modal distribution of light transmission in a fiber thatexists after high order modes and cladding modes have been attenuated. EMD is naturally achieved in longcables but can be artificially achieved to improve the accuracy of loss measurements through use of a tightcoil of fiber or a mode stripper at the output of the light source.
3.6 innerduct: A smooth or corrugated, tubular raceway system used to protect fiber-optic cables in ducts,conduits,cable trays, air plenums, and panels.
3.7 loose tube cable: A style of optical cable construction for which the fiber is loosely encased in a buffertube to isolate the fiber from external environmental and installation forces.
3.8 microbending: Sharp curvatures of the fiber resulting in axial displacements on the order of a fewmicrometers. Such bends can cause significant loss of signal into the cladding and are typically the result ofimproperly applied coatings, cabling,jacketing, and installation.
3.9 modal dispersion: The process by which a pulse traveling along the core of a multimode fiber isdistorted (broadened) as a result of the differing path (mode) lengths.
3.10 mode: A distinct path of light in The number of paths that can exist within a fiber are a function of thesize of the core and the wavelength of the light source of interest. Singlemode cables support only one pathwhile multimode fibers may support thousands of paths. The differing path lengths of each mode result insignal distortion known as modal dispersion.
IEEE 1428-2004 pdf download
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