EN 60794-5-20:2014

FOREWORD
1 Scope
2 Normative references
3 Symbols
4 General requirements
5 Microduct fibre unit
6 Microduct
7 Protected microducts
Annex A (informative) - Examples of microduct
        fibre units, microducts, and protected
        microducts
Annex B (informative) - Product descriptions (blank
        detail specification and minimum
        requirements)
Annex C (normative) - Product constructions
Annex D (normative) - Transmission requirements
Annex E (normative) - IEC 60794-1-21 Method Exx
        - Microduct inner clearance test
Annex ZA (normative) - Normative references to international
         publications with their corresponding
         European publications

IEC 60794-5-20:2014(E) is a family specification that covers outdoor microduct fibre units and corresponding microducts and protected microducts for installation by blowing. The protected microducts are intended for duct, directly buried or lashed applications. Microduct fibre units differ from microduct optical fibre cables (see IEC 60794-5-10) in that they provide less protection to the fibres that they contain. Specifically, microduct fibre units rely on the structure of the microduct, protected microduct or appropriate housing to support installation and to provide additional mechanical protection for the optical fibre over the lifetime of the product. Systems built with components covered by this standard are subject to the requirements of sectional specification IEC 60794-5 where applicable. Keywords: outdoor microduct fibre units, installation by blowing