EN 50411-2-5:2009

SLOVENSKI STANDARD
01-julij-2009
'HOLOQLNL]DRSWLþQDYODNQDLQNDEHOVNHVSRMQLFH]DXSRUDERYRSWLþQLK
NRPXQLNDFLMVNLKVLVWHPLK6SHFLILNDFLMDL]GHONDGHO=DWHVQMHQDRKLãMD
NDEHOVNLKVSRMQLF]DPLNURNDQDO]]UDþQLPYSLKRYDQMHPRSWLþQLKYODNHQWLS]D
NDWHJRULMR6 $
Fibre organisers and closures to be used in optical fibre communication systems -
Product specifications - Part 2-5: Sealed closures for air blown fibre microduct, type 1, for
category S & A
LWL-Spleißkassetten und -Muffen für die Anwendung in LWL-Kommunikationssystemen
- Produktnormen -- Teil 2-5: Abgedichtete LWL-Muffen für ABF-Mikrorohre, Bauart 1, für
die Kategorien S und A
Organiseurs et boîtiers de fibres à utiliser dans les systèmes de communication par
fibres optiques - Spécifications de produits - Partie 2-5: Boîtiers scellés pour
microconduits de fibres soufflées à l'air comprimé, pour les catégories S & A
Ta slovenski standard je istoveten z: EN 50411-2-5:2009
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50411-2-5
NORME EUROPÉENNE
May 2009
EUROPÄISCHE NORM
ICS 33.180.20
English version
Fibre organisers and closures to be used
in optical fibre communication systems -
Product specifications -
Part 2-5: Sealed closures for air blown fibre microduct,
type 1, for category S & A
Organiseurs et boîtiers de fibres à utiliser LWL-Spleißkassetten und -Muffen
dans les systèmes de communication für die Anwendung in LWL-
par fibres optiques - Kommunikationssystemen -
Spécifications de produits - Produktnormen -
Partie 2-5: Boîtiers scellés Teil 2-5: Abgedichtete LWL-Muffen
pour microconduits de fibres soufflées für ABF-Mikrorohre, Bauart 1,
à l'air comprimé, pour les catégories S & A für die Kategorien S und A

This European Standard was approved by CENELEC on 2008-12-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50411-2-5:2009 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic
interconnect, passive and connectorised components.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50411-2-5 on
2008-12-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-12-01
__________
- 3 - EN 50411-2-5:2009
Fibre organisers and closures to be used in optical fibre communication systems –
Product specifications
Sealed closures for air blown fibre microduct, type 1, for category S & A
Description Performance
Construction: Applications:
Multiple ported closure
Cable management: Microduct , protected microduct, Blown optical fibre cable
ducts and/or sub-ducts. networks:
Cable seals: Heat activated and or cold applied for underground: EN 61753-1 Category S
for aerial: EN 61753-1 Category A
Related documents:
EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for class B single-
mode fibres (IEC 60793-2-50)
EN 60794-5 Optical fibre cables – Part 5: Sectional specification – Microduct cabling for installation by
blowing (IEC 60794-5)
EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and measurement
procedures (IEC 61300 series)
EN 61753-1 Fibre optic interconnecting devices and passive components performance standard – Part 1:
General and guidance for performance standards (IEC 61753-1)
EN 61756-1 Fibre optic interconnecting devices and passive components – Interface standard for fibre
management systems – Part 1: General and guidance (IEC 61756-1)
EN 61758-1 Fibre optic interconnecting devices and passive components – Interface standard for closures –
Part 1: General and guidance (IEC 61758-1)
ETSI EN 300 019 series Environmental Engineering (EE) – Environmental conditions and environmental tests for
telecommunications equipment
Construction: Duct and cable port entries and dimensions
(Direct burial or jointing pit mounted)

Closure Max sizes of Closure Maximum
protected designs physical
microduct (Type and/or dimensions in mm
cables sub-group) Length L
mm Width W
Depth D
Inline closures
112 Type 1a 975 x 394 x 330
Inline
(multiple 35 Type 2a 648 x 274 x 152
ports)
26 Type 2b 828 x 274 x 401
Tee closures
Single port
32 300 x 200 x 100
Tee ends
(single and
double port) Double port
50 720 x 435 x 210
ends
30 Rectangular 710 x 515 x 148
Pan
(circular or 40 Circular 450 x 350 x 700
rectangular)
Pan closures 40 Elliptical 520 x 450 x 300

19 Type 1a 600 x 185 x 265
Dome
(single end 26 Type 1b 750 x 270 x 310
entry)
35 Type 1c 1 050 x 275 x 310
Dome closures
Single end entry Central split access

Contents
1 Scope . 7
1.1 Product definition . 7
1.2 Operating environment . 7
1.3 Reliability. 7
1.4 Quality assurance . 7
1.5 Allowed fibre and cable types . 7
1.6 Allowed microduct connector types . 7
1.7 Microduct storage constraints . 7
2 Normative references . 8
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 11
4 Description . 11
4.1 Microduct closure . 11
4.2 Closure housing functions . 11
4.3 Burst pressure . 11
4.4 Closure housing configurations . 12
4.5 Entry seals . 13
4.6 Common base configurations . 13
4.7 Microduct management system . 13
4.8 Materials . 14
4.9 Colour and marking . 14
4.10 Microduct connectors applications and capacity . 14
5 Variants . 15
6 Dimensional requirements . 18
6.1 Dimensions of inline closures . 18
6.2 Dimensions of tee closures. 19
6.3 Dimensions of pan closures. 20
6.4 Dimensions of dome closures. 21
7 Tests . 22
7.1 Sample size . 22
7.2 Test sample preparation . 22
7.3 Test and measurement methods . 23
7.4 Test sequence . 23
7.5 Pass/fail criteria . 23
8 Test report . 24
9 Performance requirements . 24
9.1 Dimensional and marking requirements . 24
9.2 Sealing, optical and appearance performance criteria . 25
9.3 Mechanical sealing performance requirements . 26
9.4 Environmental sealing performance requirements . 30
9.5 Mechanical optical performance requirements . 32
9.6 Environmental optical performance requirements . 33
Annex A (informative) Fibre for test sample details . 34
Annex B (informative) Sample size and product sourcing requirements . 35
Annex C (informative) Closure minimum internal diameters, containing microduct connectors . 36

- 5 - EN 50411-2-5:2009
Annex D (informative) Typical buried blown fibre microduct cable outside diameters . 41
Annex E (informative) Microduct connector definitions and sketches . 42
Annex F (informative) Microduct minimum bend radius . 45
Bibliography . 46

Figures
Figure 1 – Schematic – Minimum microduct and connector space profile (see Annex C) . 11
Figure 2 – Inline – Double port ended (I) . 12
Figure 3 – ‘Tee’ – Single entry port ends with a single port at an acute angle . 12
Figure 4 – ‘Tee’ – Double entry port ends with single or double ports at an acute angle . 12
Figure 5 – Pan – Entry ports in one position at 90° to the circular cover removal axis . 12
Figure 6 – Pan – Entry ports in one position at 90° to the rectangular cover removal axis . 12
Figure 7 – Dome – Single end entry ported closure . 13
Figure 8 – Diagram showing inline – Closures dimensions – Type 1 configuration . 18
Figure 9 – Diagram showing inline – Closures dimensions – Type 2a and 2b configurations . 18
Figure 10 – Diagram showing tee – Closures dimensions showing single ports . 19
Figure 11 – Diagram showing tee – Closures dimensions showing double ports . 19
Figure 12 – Diagram showing pan – Circular or elliptical closures dimensions . 20
Figure 13 – Diagram showing pan – Rectangular closures dimensions . 20
Figure 14 – Diagram showing dome – Circular and elliptical closures dimensions . 21
Figure 15 – Track joint configuration sample. 22
Figure 16 – Spur joint configuration sample . 23
Figure 17 – Distribution joint configuration sample . 23
Figure C.1 – Schematic – Minimum microduct and connector space profile . 36
Figure E.1 – Straight microduct connectors . 42
Figure E.2 – Straight bulkhead microduct connectors . 42
Figure E.3 – ID/OD/ID and OD reducer/enlarger stem microduct connectors . 42
Figure E.4 – ‘ID/OD/ID and OD reducer/enlarger’ microduct connectors . 43
Figure E.5 – Close down microduct connectors . 43
Figure E.6 – Liquid block microduct connectors . 43
Figure E.7 – Liquid block with a barb end . 43
Figure E.8 – End stop microduct connectors . 44

Tables
Table 1 – Variants for sealed closures for ABF protected microduct, for category S & A . 15
Table 2 – Line closure capacity – Protected microduct cable selection – Maximum . 16
Table 3 – Tee closure capacity – Protected microduct cable selection – Maximum . 16
Table 4 – Pan closure capacity – Protected microduct cable selection – Maximum . 17
Table 5 – Closure capacity – Protected microduct cable selection – Maximum . 17
Table 6 – Dimensions of inline closures – Type 1, 2a and 2b configurations . 18
Table 7 – Dimensions of tee closures . 19
Table 8 – Dimensions of pan closures . 20
Table 9 – Dimensions of dome closures . 21
Table 10 – Tightness, optical and appearance performance criteria . 25
Table 11 – Mechanical performance requirements . 26
Table 12 – Environmental sealing performance requirements . 30
Table 13 – Mechanical optical performance requirements . 32
Table 14 – Environmental optical performance requirements . 33
Table A.1 – Fibre references . 34
Table B.1 – Minimum sample size requirements . 35
Table C.1 – Typical ABF closure minimum internal diameters, containing 2 blown fibre microduct
connectors . 37
Table C.2 – Typical ABF closure minimum internal diameters, containing 4 blown fibre microduct
connectors . 37
Table C.3 – Typical ABF closure minimum internal diameters, containing 7 blown fibre microduct
connectors . 38
Table C.4 – Typical ABF closure minimum internal diameters, containing 8 blown fibre microduct
connectors . 38
Table C.5 – Typical ABF closure minimum internal diameters, containing 9 blown fibre microduct
connectors . 39
Table C.6 – Typical ABF closure minimum internal diameters, containing 12 blown fibre microduct
connectors . 39
Table C.7 – Typical ABF closure minimum internal diameters, containing 19 blown fibre microduct
connectors . 40
Table C.8 – Typical ABF closure minimum internal diameters, containing 24 blown fibre microduct
connectors . 40
Table D.1 – Number of microducts per protected microduct – Direct bury . 41
Table D.2 – Number of microducts per protected microduct – Direct bury reinforced . 41
Table F.1 – Compilation of company standards, to arrive to an industry standard . 45

- 7 - EN 50411-2-5:2009
1 Scope
1.1 Product definition
This specification contains the initial, start of life dimensional, optical, mechanical and environmental
performance requirements which a fully installed blown fibre protected microduct closure must meet in order
for it to be categorised as an EN standard product.
These products are suitable for installation of and use with microduct fibre units, microduct optical fibre
cables, microduct and protected microduct as defined within EN 60794-5.
1.2 Operating environment
The tests selected combined with the severities and duration are representative of an outside plant for
subterranean and/or aerial environment defined by:
• ETSI EN 300 019 series: Class 8.1: underground locations (without earthquake requirement);
• EN 61753-1: Category S: subterranean environment;
Category A: aerial environment.
1.3 Reliability
Whilst the anticipated service life expectancy of the product in this environment is a minimum of 20 years,
compliance with this specification does not guarantee the reliability of the product. This should be predicted
using a recognised reliability assessment programme.
1.4 Quality assurance
Compliance with this specification does not guarantee the manufacturing consistency of the product. This
should be maintained using a recognised quality assurance programme.
1.5 Allowed fibre and cable types
This closure standard covers all IEC standard optical fibre microducts, and protected microducts with their
various fibre capacities, types and designs. This includes, but is not limited to, optical fibre cable standard
EN 60794-5.
This product specification has only considered protected microduct cables containing microducts of same
outside diameters. There are other hybrid protected microduct cables with microducts of differing OD’s, with
too many variants to be included in this PS.
1.6 Allowed microduct connector types
This closure standard covers all EN standard microduct connectors, including: straight, reducer/enlarger
stem, reducer/enlarger, close down, liquid block, liquid block with barb end, and end stop connectors. This
includes, but is not limited to, EN 50411-2-8.
1.7 Microduct storage constraints
Microduct excess storage is not required in all air blown fibre closures. Some closure types do not have
sufficient internal space to provide storage. The need for microduct storage is provided inside the closure
when opened, typically to ensure that there is enough microduct to fulfil the following functions:
• remove the coiled microduct attached to the ‘closedown’ connectors, to a remote location, close to
blowing equipment, in the process uncoiling the microducts to aid blowing;
• provide additional microduct if repeated cut backs for connectors are planned or likely to be fitted
throughout the closure life.
The minimum microduct storage bend radius is based on the outside diameter and material selection,
typically based on 12 times the outside diameter (below 8 mm) and 20 times above. During fibre blowing the
bend radius is typically 20 times the microduct diameter.

2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 50411-2-8 Fibre organisers and closures to be used in optical fibre communication systems –
Product specifications – Part 2-8: Microduct connectors, for air blown optical fibres,
Type 1
EN 60068-2-10 Environmental testing – Part 2-10: Tests – Test J and guidance: Mould growth
(IEC 60068-2-10)
EN 60794-1-2:2003 Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures (IEC 60794-1-2:2003)
EN 60794-5 Optical fibre cables – Part 5: Sectional specification – Microduct cabling for
installation by blowing (IEC 60794-5)
EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures (IEC 61300 series)
EN 61300-2-1 Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal) (IEC 61300-2-1)
EN 61300-2-4 Part 2-4: Tests – Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-5 Part 2-5: Tests – Torsion/twist (IEC 61300-2-5)
EN 61300-2-10 Part 2-10: Tests – Crush resistance (IEC 61300-2-10)
EN 61300-2-12:2005 Part 2-12: Tests – Impact (IEC 61300-2-12:2005)
EN 61300-2-22 Part 2-22: Tests – Change of temperature (IEC 61300-2-22)
EN 61300-2-23:1997 Part 2-23: Tests – Sealing for non-pressurized closures of fibre optic devices
(IEC 61300-2-23:1995)
EN 61300-2-26 Part 2-26: Tests – Salt mist (IEC 61300-2-26)
EN 61300-2-33 Part 2-33: Tests – Assembly and disassembly of closures (IEC 61300-2-33)
EN 61300-2-34 Part 2-34: Tests – Resistance to solvents and contaminating fluids (IEC 61300-2-34)
EN 61300-2-37 Part 2-37: Tests – Cable bending for fibre optic closures (IEC 61300-2-37)
EN 61300-2-38:2006 Part 2-38: Tests – Sealing for pressurized fibre optic closures (IEC 61300-2-38:2006)
EN 61300-3-1 Part 3-1: Examinations and measurements – Visual examination (IEC 61300-3-1)
EN 61300-3-3:2003 Part 3-3: Examinations and measurements – Active monitoring of changes in
attenuation and return loss (IEC 61300-3-3:2003)
EN 61300-3-28 Part 3-28: Examinations and measurements – Transient loss (IEC 61300-3-28)
EN 61753-1 Fibre optic interconnecting devices and passive components performance standard –
Part 1: General and guidance for performance standards (IEC 61753-1)
ETSI EN 300 019 series Environmental Engineering (EE) – Environmental conditions and environmental tests
for telecommunications equipment
ISO 1998-1 Petroleum industry – Terminology – Part 1: Raw materials and products
EN 590 Automotive fuels – Diesel – Requirements and test methods

- 9 - EN 50411-2-5:2009
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
ducts
semi-rigid underground pipe, typically manufactured from a polymeric material, and typically greater than
65 mm outside diameter
3.1.2
sub-ducts
underground semi-flexible pipes, which may fit inside a duct, typically manufactured from a polymeric
material, and typically less than 50 mm outside diameter
3.1.3
microducts (MD)
small, flexible, lightweight tube with an outer diameter typically less than or equal to 16 mm
3.1.4
protected microducts
one or more microducts surrounded by a protective sheath and/or protected by a duct/sub-duct
3.1.5
microduct optical fibre cables
optical fibre cables suitable for installation by blowing into a microduct
3.1.6
microduct fibre units
fibre unit that is suitable for installation by blowing into a microduct. It differs from microduct optical fibre
cables in that it provides less protection to the fibres that it contains
3.1.7
air blown fibre (ABF) microduct closure
ABF microduct closures provide a physical housing for microduct management; connection, fixing, sealing,
anchoring, liquid and/or gas blocking, storage and routing up to the input and output protected microduct of
the air blown fibre cable closure system
3.1.8
blowing point closure
closure used as a position for blowing fibre at multiple points in series (cascade blowing). Typically the
closure contains ‘close down’ microduct connectors, for fibre access to the blowing head equipment
3.1.9
straight microduct connectors
microduct connectors are used to connect two microducts together. This connector has a means of
microduct attachment and sealing on both sides and is typically unsupported (floating inside the closure)
3.1.10
straight bulkhead microduct connectors
microduct connectors are used to connect two microducts together. This connector has a means of
microduct attachment and sealing on both sides and is typically supported on a bulkhead attached by a
suitable fixing system (i.e. nut or clip)
3.1.11
different ID reducers/enlarger stem microduct connectors
stem connector which connects two microducts with the same OD but different ID, with a smooth internal
transition to prevent fibre hang ups. Typically they have microduct attachment and sealing at one end of the
connector, and a stem on the other end to facilitate attachment to a straight connector
3.1.12
different ID reducers/enlarger microduct connectors
connectors which connects two microducts with the same OD but different ID, including a smooth internal
transition to prevent fibre hang ups. Typically they are used to connect a heavy walled to a thinner wall MD

3.1.13
different OD reducers/enlarger stem microduct connectors
stem which connects two microducts with the same ID but different OD. Typically they have microduct
attachment and sealing at one end of the connector, and a stem on the other end to facilitate attachment to a
straight connector
3.1.14
different OD reducers/enlarger microduct connectors
connector which connects two microducts with the same ID, but different OD
3.1.15
different ID and OD reducers/enlarger stem microduct connectors
stem which connects two microducts with a different OD and different ID; including a smooth internal
transition to prevent fibre hang ups. Typically they have microduct attachment and sealing at one end of the
connector, and a stem on the other end to facilitate attachment to a straight connector
3.1.16
different ID and OD reducers/enlarger microduct connectors
connector which connects two microducts with different OD’s and different ID’s, including a smooth internal
transition to prevent fibre hang ups
3.1.17
close down microduct connectors
microduct connectors that are used for fibre access for blowing head equipment for cascade blowing,
allowing a microduct to be opened and resealed after blowing, without detriment to the fibre in situ
3.1.18
liquid block microduct connectors
microduct connectors that are used at a transition point to stop liquids from flowing between the connected
microducts to avoid liquid and contaminant ingress and liquid damage to other equipment
3.1.19
liquid block with a barb end
similar to a liquid block connector, at the barb end. The barb end is designed to interface with the non-
microduct (transport tubing), which protects the fibre at a “fibre management system” closure
3.1.20
end stop microduct connectors
microduct connectors that are used for sealing open ended microduct, avoiding air leakage, water or foreign
material ingress
3.1.21
connector insertion force
force required to insert the microduct into the connector without damage
3.1.22
fibre management system (FMS)
system to control fibre routing from the incoming to the outgoing fibres, containing one or more splice
cassettes and additional functional elements
3.1.23
microduct management system
system to control microduct routing inside a closure or housing, from the incoming to the outgoing microduct,
all jointed together with microduct connectors of various functional types
3.1.24
burst pressure
point at which the closure fails to contain pressure
3.1.25
cut backs
process to remove a short length of microduct in order to prepare the ends, prior to fitting a new connector,
ensuring better sealing and attachment faces

- 11 - EN 50411-2-5:2009
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
PS Product Specification
MD Microduct
ABF Air Blown Fibre
ID Inside Diameter (microducts)
OD Outside Diameter (microducts)
AC Across Corners
MMS Microduct Management System
4 Description
4.1 Microduct closure
An ABF microduct closure comprises a closure housing that is attached to the ends of
• an underground installed duct or sub duct or
• an air blown fibre protected microduct.
Microduct closures comprises an access housing that allows the interconnection and storage of microducts
or protected microducts. Figure 1, shows the minimum space profile required to house microduct connectors.
Minimum space required as a diameter where microduct
Duct or cable attachment
connectors are equally spaced
W centred
V Diameter
(minimum)
(minimum)
(Inside the cover body ends or end plates)
(Inside cover diameter)
Figure 1 – Schematic – Minimum microduct and connector space profile (see Annex C)
4.2 Closure housing functions
Microduct closures for protected microducts have three basic functions they are to provide:
• a branch off for secondary microduct installation to a customer;
• an intercept to an existing pre-installed protected microduct;
• an access point for blowing fibre onward using conventional blowing equipment.
4.3 Burst pressure
The microduct system may fail therefore the closure must be able to be fitted with an over pressure safety
system. This system should be able to exhaust air fast enough to ensure that a safe working pressure of
equal to, or less than 0,4 bars is maintained when the correct installation pressure is applied.

4.4 Closure housing configurations
4.4.1 Inline closure housing configurations (I)
Inline closures have cable entry ports in two positions at opposite ends. Each end typically has one or two
ports. Figure 2 shows a typical option for the ‘I’ closure type, any entry port can also be an exit port.

Figure 2 – Inline – Double port ended (I)
4.4.2 Tee closure housing configurations (T)
Tee closures have cable entry ports in three positions, one at each end and one at an acute angle, typically
at 90°. Each position typically has one or two ports. Figures 3 and 4 show typical options for the ‘T’ closure
type. This group also covers ‘Y’ closures at various angles.

Figure 3 – ‘Tee’ – Single entry port ends with a single port at an acute angle

Figure 4 – ‘Tee’ – Double entry port ends with single or double ports at an acute angle
4.4.3 Pan closure housing configuration (P)
Pan closures have cable entry ports in one position at 90° to the cover removal axis. They have typical three
or more ports. Figures 5 and 6 show typical options for the ‘P’ closure body types, typically circular, elliptic or
rectangular.
Figure 5 – Pan – Entry ports in one position at 90° to the circular cover removal axis

Figure 6 – Pan – Entry ports in one position at 90° to the rectangular cover removal axis

- 13 - EN 50411-2-5:2009
4.4.4 Dome closure housing configuration (D)
Dome closures have cable entry ports entering and exiting the same side, with high numbers of small cable
ports and low numbers of larger ports. Microduct storage is required over 180°. Figure 7 shows a typical
option for the ‘D’ closure type.

Figure 7 – Dome – Single end entry ported closure
4.5 Entry seals
Entry seal systems can be either:
- (H) Dedicated heat activated heat source for example, electrical, infrared, hot air or flame
• thermo-shrinkable materials,
• hot melt adhesives,
• polyethylene injection welding.
- (C) Dedicated cold applied
• mastic, tapes, pastes, potting compounds, gels and cold adhesives,
• o-rings, grommets, rubber shapes, are cold processes.
- (U) Combined heat activated and cold applied
All seals should be installed according to manufacturer’s guidelines.
4.6 Common base configurations
The design of the closure housing shall allow the jointing of two or more microducts, or protected microducts
in the following configuration or applications:
Track joint: configuration used to connect two sub-ducts or protected microducts, with a minimum of
2 entry ports
Spur joint: configuration used on local feeder cable with minimum of 3 cable entry ports
Distribution joint: configuration used on customer feed cable with minimum of 8 cable entry ports
NOTE Entry ports can accommodate more than one sub-duct or protected microduct.
The design of the distribution and spur closure housing shall allow the joining together of at least one pair of
cables which are not at the end of a cable section. This application is generally known as distribution,
external node or a mid-span closure.
It is desirable that the closure can be re-opened when necessary without interruption or disturbance of the
traffic of the live circuits within the microducts.
4.7 Microduct management system
The microduct management system consists of stored or routed microducts to EN 60794-5 and microduct
connectors to EN 50411-2-8. The system provides a means for routing, storing (if appropriate) and protecting
of microduct connectors or other passive optical devices (e.g. a blowing head) in a predetermined order.
A closure used as a blowing location requires storage of fibre microducts of a length suitable for remote
deployment to a blowing head.
4.8 Materials
All materials that are likely to come in contact with personnel shall meet appropriate health and safety
regulations. Materials must conform to ROHS requirements.
Closure and sealing materials shall be compatible with each other and with the materials of the cables.
All components of the closure shall be resistant to solvents and degreasing agents typically used.
The effects of fungus shall be determined by measuring a suitable property both before and after exposure
and tested according to EN 60068-2-10 (micro-organisms), using the 28-day test.
The effects of UV light shall not affect product performance for aerial closures. The use of UV stabilised
materials for the outer housing is required.
Metallic parts shall be resistant to the corrosive influences they may encounter during the lifetime of the
product.
4.9 Colour and marking
Marking/identification of the variant number (see Clause 5) should be on the product or packaging label
along with the following:
a) identification of manufacturer;
b) manufacturing date code: year / month.
4.10 Microduct connectors applications and capacity
The different types of microduct connectors can be found in EN 50411-2-8, ABF Microduct connectors for
non-sealed closures, this covers all applications and include the following connector types:
• straight connector (see note);
• straight bulkhead connector;
• ID reduce/enlarger stem connector;
• ID reduce/enlarger connector;
• OD reduce/enlarger stem connector;
• OD reduce/enlarger connector;
• ID and OD reduce/enlarger stem connector;
• ID and OD reduce/enlarger connector;
• close down connector;
• liquid block connector;
• liquid block with a barb end connector;
• end stop connector.
NOTE In order to reduce the number of variables, all connector volumes for any given closure size is based on the microduct outside
diameter with a standard size straight connector. The straight connector has been selected as it is the most widely used type.

- 15 - EN 50411-2-5:2009
5 Variants
Table 1 – Variants for sealed closures for ABF protected microduct, for category S & A
EN 50411-2-5 – X – X – X – X – XXX – XX – XX – XX
1 2 3 4 5 6 7 8
Variant No. X Environmental performance
S Subterranean environment (underground)
A Aerial environment (above ground level)
B Both subterranean and aerial

Variant No. X Operating environment
T Track closure (2 cable entries minimum)
S Spur closure (3 cable entries minimum)
D Distribution closure (8 cable entries minimum)

Variant No. X Protected microduct sealing technology
R Cold applied
H Heat activated (heat source required)
U Universal, both methods in a single cable entry base

Variant No. X Closure type, shape and port configuration
I Inline – multiple port ends
T Tee
P Pan
C Dome (all at the same end)
Variant No. XXX Microduct storage and fibre blow through
BNS Fibre blow through with no storage
BWS Fibre blow through and storage
BFS Blow from (not through) but has storage

Microduct outside diameter – Stored (straight connector only)
Variant No.  XX
Outside diameter
03 3 mm
04 4 mm
05 5 mm
06 6 mm
07 7 mm
08 8 mm
10 10 mm
12 12 mm
14 14 mm
Depending on the primary protected microduct cable selection in Variant XX and XX (number of microducts
6 7
1, 2, 4, 7, 8, 9, 12, 19, 24 and 30 ) refer to one of the following Tables 2, 3, 4 and 5 to find X .
Tables 2, 3, 4 and 5 are based on buried protected microduct cables.
Table 2 – Line closure capacity – Protected microduct cable selection – Maximum
03 04 05 06 07 08 10 12 14
XX Æ
Number of microducts in the protected microduct cable XX
Microduct O/D
(number in box)
XX Closure
NA 19 7 7 4 2 1
NB 24 24 24 24 24 19 12 7 1
24 24 24 24 24 24 19 19 1
NC
ND 24 24 24 24 24 24 19 19 1
NE
24 24 24 24 24 24 19 19 1
NF 24 24 24 19 7 7 4 2 1
NG 24 19 7 4 4 4 2 1 1
NH 19 7 7 4 2 1
NJ
19 7 7 4 2 1
NK 19 7 7 4 2 1
NL 19 7 7 4 2 1
Table 3 – Tee closure capacity – Protected microduct cable selection – Maximum
03 04 05 06 07 08 10 14
XX Æ
Number of microducts in the protected microduct cable XX
Microduct O/D
(number in box)
XX Closure
TA 24 12 7 4 4 2 1
TB 24 24 12 12 12 7 4 1
TC 24 24 24 12 12 12 7 1
TD 24 24 24 12 12 12 7 1
TE
24 24 24 12 12 19 7 1
TF 24 24 24 12 12 19 7 1
- 17 - EN 50411-2-5:2009
Table 4 – Pan closure capacity – Protected microduct cable selection – Maximum
03 04 05 06 07 08 10 14
XX Æ
Number of microducts in the protected microduct cable XX
Microduct O/D
(number in box)
X Closure
PA 12 7 2 2 1
24 12 7 4 4
...