1、 IEC 60794-5-20Edition 1.0 2014-02INTERNATIONAL STANDARD Optical fibre cables Part 5-20:Family specification Outdoor microduct fibre units,microducts and protected microducts for installation by blowing IEC 60794-5-20:2014-02(en)colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters
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11、ance,please contact the Customer Service Centre:csciec.ch.Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC 60794-5-20 Edition 1.0 2014-02 INTERNAT
12、IONAL STANDARD Optical fibre cables Part 5-20:Family specification Outdoor microduct fibre units,microducts and protected microducts for installation by blowing INTERNATIONAL ELECTROTECHNICAL COMMISSION V ICS 33.180.01,33.180.10 PRICE CODE ISBN 978-2-8322-1420-6 Registered trademark of the Internati
13、onal Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitte
14、d.Uncontrolled when printed.2 60794-5-20 IEC:2014(E)CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Symbols.7 4 General requirements.8 4.1 Construction.8 4.1.1 General.8 4.1.2 Microduct fibre units.9 4.1.3 Microducts.9 4.1.4 Protected microducts.9 4.1.5 Microduct fittings.9 4.1.6 Microduct
15、hardware.10 4.2 Optical fibres.10 4.3 Installation performance tests.10 4.3.1 Installation conditions.10 4.3.2 Tests applicable.11 4.3.3 Mechanical and environmental tests.11 5 Microduct fibre unit.11 5.1 Tests applicable.11 5.2 Family requirements and test conditions for microduct fibre unit tests.
16、12 5.3 Tensile performance.12 5.4 Crush.12 5.5 Repeated bending.13 5.6 Torsion.13 5.7 Kink.13 5.8 Bend.13 5.9 Temperature cycling.13 5.10 Ageing.14 5.11 Water immersion.14 5.12 Buffer removal.14 6 Microduct.14 6.1 Tests applicable.14 6.2 Tensile performance.15 6.3 Crush.15 6.4 Impact.16 6.5 Repeated bending.16 6.6 Torsion.16 6.7 Kink.16 6.8 Bend.16 6.9 Microduct route verification test.17 6.10 Microduct pressure withstand.17 6.11 Ageing.17 7 Protected microducts.17 7.1 Tests applicable.17 7.2
