IEC 60794-3-12 pdf – Optical fibre cables – Part 3-12: Outdoor cables – Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling
1 scope
This part of IEC 60794 is a detailed specification for duct and directly buried opticaltelecommunication cables for use in premises cabling to ensure compatibility ” withISO/IEC 11801-1.This document’s requirements ensure that the iSOIEC 11801-1 models work for generic cabling and system performances.Values in this document support these models.
The requirements of the family specification lEC 60794-3-10 are applicable to cables covered by this document.Particular requirements detailed in Clause 5 either define a specific optionrelative to the requirements of lEC 60794-3-10 or define additional requirements.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.
For undatedreferences,the latestedition of the referenced document(including anyamendments) applies.
IEC 60793-2-10:2019, Optical fibres – Part 2-10: Product specifications – Sectionalspecification for category A1 multimode fibres
IEC 60793-2-50:2018,Optical fibres – Part 2-50: Product specifications – Sectionalspecification for class B single-mode fibres
IEC 60794-1-1，Optical fibre cables – Part 1-1: Generic specification – General
IEC 60794-1-2，Optical fibre cables – Part 1-2: Generic specification – Basic optical cable testprocedures – General guidance
IEC 60794-3，Optical fibre cables – Part 3: Outdoor cables – Sectional specification
IEC 60794-3-10，Optical fibre cables – Part 3-10:Outdoor cables-Family specification for duct,directly buried and lashed aerial optical telecommunication cables
3Terms and definitions
No terms and definitions are listed in this document.
IsO and lEC maintain terminological databases for use in standardization at the followingaddresses:
·lEC Electropedia: available at http://www.electropedia.orgl
. ISO Online browsing platform: available at http://www.iso.org/obp
4General requirements
The cable shallcomply with the family specification，IEC 60794-3-10,and meet therequirements which are defined in it, including requirements in the sectional specification,IEC 60794-3. Particular requirements detailed in Clause 5 are optional，relative to therequirements of lEC 60794-3-10, or define additional requirements.
The optical fibre contained in cables covered by this document shall comply with one of thefollowing standards,and meet the normative requirements defined within them as applicable:
-IEC 6o793-2-50:2018,Annex A
(single-mode B-652.D fibre sub-category);
– IEC 60793-2-50:2018,Annex F
(single-mode B-657 fibres);
·IEC 60793-2-10:2019,Annex A
(multimode fibre sub-categoriesA1-OM3，A1-OM4and
A1-OM5)-
To ensure compatibility with the ISO/EC 11801 series, optical performance level requirements
are presented in tems of the performance classification codes for cabled optical fibre asfollows:
– os1a: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 requlrements defined in this document. The O81,
ISOVIEC11801(Parts1 through 6).See IsolEC 11801-1:2017,Annex F, for more information.”
OM1_and OM2 performance classification_ codes forcabled optical fibre ae no longernormative in
5Particular requirements
5.1General
These requirements either define a specific option relative to the requirements ofIEC60794 -3-10 or define additional requirements.
5.2MICE(mechanical, ingress, climatic and chemical and electromagnetic)
characteristics
Cables intended for installation in conformity with ISO/IEC11801-1 and related standards may
require the specification of additional tests to ensure their suitabilityin the applicableenvironments defined by the mechanical,ingress，climatic and chemical and electromagnetic(MICE) classification. Such tests are outside the scope of lEC 60794 cable specifications, andMICE ‘criteria are not part of the requirements for lEC 60794 specifications.The MICE testsmay be the same as, similar to, or substantially different from, the tests required by lEC 60794specifications, specificallythose in IEC 60794-1-21,IEC 60794-1-22 and’ IEC 60794-1-23.Cables manufactured per lEC 60794 specifications, may or may not meet the MICE criteria.For
supplemental discussion, see lEC TR 62362.
5.3Transmission requirements
5.3.1Attenuation of cabled fibre
Depending on the fibre category,the attenuation coefficient of the cabled fibre shall be lessthan 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.