EN 50411-2:2008

1 Scope
   1.1 Rules and conventions
   1.2 Product definition
   1.3 Operating environment
   1.4 Reliability
   1.5 Quality assurance
   1.6 Safety
   1.7 FMS closure future proof requirement
   1.8 Fibre types and cable designs
   1.9 FMS to closure interfaces - Informative information
2 Normative references
3 Definitions and abbreviations
   3.1 Definitions
   3.2 Abbreviations
4 Closure options defined
   4.1 Closure with FMS housing functionality
   4.2 ABF closure housing functionality
   4.3 Closure shape options defined
   4.4 Product specification options defined
   4.5 Common base options defined
   4.6 Cable entry seal options
   4.7 Fibre management system options defined
   4.8 ABF microduct connector options defined
5 Closure options, geometrical forms and dimensioning requirements
   5.1 Dome and pan closure geometrical forms
   5.2 Inline closure geometrical form
   5.3 Air blown microduct geometrical forms
6 Closure with FMS general functional requirements
   6.1 Closure with FMS functional parts
   6.2 FMS functional parts
   6.3 General functional requirements of a closure with FMS
   6.4 General functional requirements of the FMS
   6.5 FMS - Functional options housed in closures
   6.6 FMS splicing to closure interfaces
   6.7 FMS optical fibre connector to closure interfaces
   6.8 ABF closure interface - Microduct minimum bend radius
7 Closure with ABF microduct connectors general functional
   requirements
   7.1 Air blown fibre systems
   7.2 Future proof closures, functional requirements
   7.3 All closure outside profile, dimensional conventions
   7.4 All microduct connector outside/bulkhead profile,
        dimensional conventions
8 General product descriptions
   8.1 Materials
   8.2 Colour and marking
   8.3 Environmental, functional requirements
9 Variants layouts - Closure and microduct connector
10 Tests
   10.1 Sealed closure sample size
   10.2 Sealed closure with FMS test sample preparation
   10.3 Closures with FMS optical test sample construction
   10.4 Closure with FMS test and measurement methods
   10.5 Closure with FMS test sequence
   10.6 Closure with FMS pass/fail criteria
11 Performance requirements
   11.1 Dimensional and marking requirements
   11.2 Sealed closure sealing, optical and appearance performance
        criteria
   11.3 Sealed closure environmental and mechanical performance
        test methods
   11.4 Unsealed closure environmental and mechanical performance
        test methods
   11.5 Microduct connector sealing, optical and appearance
        performance criteria
   11.6 Microduct connector - Environment and mechanical
        performance test methods
Bibliography

1.1Rules and conventionsThis general and guidance document provides a framework for new product specification in the series EN 50411-2-X rules and conventions under which a closure interface is created, and provides a consistent structure:•headings;•format;•abbreviations;•definitions;•references;•descriptions;•document structure details;•tables;•diagrams;•dimensions; and•product variants.This general and guidance document provides general information that defines the closure options, including the following:•level of sealing, sealed or non-sealed;•closure configurations, shape and/or entry port orientation;•‘fibre management system’ or ‘microduct’ connectors contained within the housing;•cable port entry configurations, number of ports;•cable sealing method, heat or non-heat activated.In order to comply with the specification, the following closure and/or FMS requirements must be defined:•sealing and optical functionality;•physical dimensioning, giving the maximum outer perimeters for all sizes;•geometrical form and or shape;•dimensioning.1.2Product definition A product specification shall contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements of a fully installed closure in order for it to be categorised as an EN standard product.The product specification should provide external overall dimensioning of closures to fit in their external location, e.g. underground chambers, street furniture or aerial applications.A fibre splice closure product specification includes both the parameters of the closure housing, the fibre splicing management system. These systems are always supplied together with the closure as a matched set including other functional or ancillary parts of an optical node. An air blown fibre closure product specification includes only the parameters of the closure housing. Air blown fibre closures are normally supplied without a microduct connector, largely because of uncertainty over connector method, microduct sizes, quantity and type of connector used. This closure specification allows single mode fibre to be used, and covers all IEC or EN standards of optical fibre cables as listed in the normative references with their various fibre, capacities, types and designs.For convenience the term “cable” in this document may refer to different types of optical fibre cable designs, including ‘air blown fibre’, ‘protected microduct’, or ‘microduct’.1.3Operating environmentAll tests for closures combined with the severity and duration, and are representative of an outside plant for subterranean and/or aerial environments defined by:ETSI EN 300 019 seriesClass 8.1: underground locations (without earthquake requirement)EN 61753-1Category S: subterranean environmentCategory A: aerial environment.1.4ReliabilityWhilst the anticipated service life expectancy of the closure in this environment is at least 20 years, compliance with this a product specification does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme.