IEC 60794-3-12:2021 pdf free download

IEC 60794-3-12:2021 pdf free download Optical fibre cables – Part 3-12: Outdoor cables – Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling
• OS1 a: single-mode fibre, sub-categories B-652.D or B-657;
• OS2: single-mode fibre, sub-categories B-652.D or B-657;
• OM3: multimode fibre sub-category A1 -OM3;
• OM4: multimode fibre sub-category A1 -OM4;
• OM5: multimode fibre sub-categoryA1 -OM5.
NOTE These codes are informative from the perspective of the requirements defined in this document. The OS1 ,OM1 and OM2 performance classification codes for cabled optical fibre are no longer normative in ISO/IEC 1 1 801 (Parts 1 through 6). See ISO/IEC 1 1 801 -1 :201 7, Annex F, for more information.
5 Particular requirements
5.1 General
These requirements either define a specific option relative to the requirements of IEC 60794‑3‑1 0 or define additional requirements.
5.2 MICE (mechanical, ingress, climatic and chemical and electromagnetic) characteristics
Cables intended for installation in conformity with ISO/IEC 1 1 801 -1 and related standards may require the specification of additional tests to ensure their suitability in the applicable environments defined by the mechanical, ingress, climatic and chemical and electromagnetic (MICE) classification. Such tests are outside the scope of IEC 60794 cable specifications, and MICE criteria are not part of the requirements for IEC 60794 specifications. The MICE tests may be the same as, similar to, or substantially different from, the tests required by IEC 60794 specifications, specifically those in IEC 60794-1 -21 , IEC 60794-1 -22 and IEC 60794-1 -23. Cables manufactured per IEC 60794 specifications, may or may not meet the MICE criteria. For supplemental discussion, see IEC TR 62362.
5.3 Transmission requirements
5.3.1 Attenuation of cabled fibre
Depending on the fibre category, the attenuation coefficient of the cabled fibre shall be less than the maximum values in Table 1 for the multimode fibres and less than the maximum values
in Table 2 for single-mode fibres – for the wavelengths listed in Table 2.
The fibre category and performance level shall be agreed between customer and supplier.
5.3.2 Fibre bandwidth requirements
There are no bandwidth requirements on single-mode fibre.
For cables containing multimode fibres, the uncabled fibre shall be specified at one of the performance levels defined in Table 3 in terms of minimum bandwidth (MHz·km), wavelength,and type of measurement.
The fibre category and performance level shall be agreed between customer and supplier.
5.3.3 Polarization mode dispersion (PMD) requirements
Cables containing single-mode fibres shall meet the PMD requirement of IEC 60794-3. This is given as a link design value, PMD Q , with a maximum of 0,5 ps/km −2 allowed.
IEC 60794-1 -21 , Optical fibre cables – Part 1-21: Generic specification – Basic optical cable test procedures – Mechanical test methods
IEC 60794-1 -22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable test procedures – Environmental test methods
IEC 60794-1 -23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable test procedures – Cable element test methods
IEC TR 62362, Selection of optical fibre cable specifications relative to mechanical, ingress,climatic or electromagnetic characteristics – Guidance