SIST EN 50411-2-4:2006
(Main)Fibre organisers and closures to be used in optical fibre communication systems - Product specifications -- Part 2-4: Sealed dome fibre splice closures Type 1, for category S & A
Fibre organisers and closures to be used in optical fibre communication systems - Product specifications -- Part 2-4: Sealed dome fibre splice closures Type 1, for category S & A
This specification contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements of a fully installed splice closure in order for it to be categorised as an EN standard product.
LWL-Spleißkassetten und -Muffen für die Anwendung in LWL-Kommunikationssystemen - Produktnormen -- Teil 2-4: LWL-Muffen Bauart 1 mit abgedichteter Haube 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 2-4: Boîtiers à épissure de fibres sous dôme scellés Type 1, pour catégories S & A
1.1 Définition de produit La présente spécification contient les exigences de performances initiales, dimensionnelles, de début de vie, optiques, mécaniques et environnementales d’un boîtier à épissure entièrement installé, afin d'être classé comme produit couvert par une norme EN de produit. 1.2 Environnement de fonctionnement Les essais sélectionnés, combinés avec les sévérités et les durées, sont représentatifs d’une installation extérieure pour les environnements souterrains et/ou aériens définis par les normes suivantes: ETS 300 019 classe 8.1: emplacements souterrains (sans exigence sismique) CEI 61753-1 catégorie S: environnement souterrain - catégorie A: environnement aérien 1.3 Fiabilité Tandis que l'espérance de vie en service prévue du produit dans cet environnement est de 20 ans, la conformité avec cette spécification ne garantit pas la fiabilité du produit. Il convient que celle-ci soit estimée en utilisant un programme reconnu d'évaluation de la fiabilité. 1.4 Assurance de la qualité La conformité à cette spécification ne garantit pas la cohérence de fabrication du produit. Il convient qu’elle soit maintenue en utilisant un programme d'assurance de la qualité reconnu. 1.5 Types de fibres et câbles autorisés Bien que les essais de performance soient effectués sur des échantillons d’essai avec des fibres monomodales à gaines compensées avec dispersion non décalée (voir Annexe A), le boîtier, une fois essayé conformément à cette spécification de produit, sera également adapté à d’autres types de fibres tels que les fibres à dispersion décalée, à dispersion non-nulle décalée et multimodales. La norme de boîtier permet tant à la fibre monomodale qu’à la fibre multimodale d’être utilisée et couvre tous les câbles à fibres optiques des normes CEI avec leurs diverses capacités, types et conceptions de fibres. Ceci inclut les, mais ne limite pas aux, normes de câbles à fibres optiques EN 60794-2 (intérieurs), EN 60794-3 (extérieurs).
Organizatorji in ohišja za uporabo v komunikacijskih sistemih z optičnimi kabli – Specifikacije izdelka – 2-4. del: Ohišja za neločljivi optični spoj z zatesnjenim pokrovom tipa 1, kategorije S&A
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 50411-2-4:2006
STANDARD
oct 2006
Organizatorji in ohišja za uporabo v komunikacijskih sistemih z optičnimi
kabli – Specifikacije izdelka – 2-4. del: Ohišja za neločljivi optični spoj z
zatesnjenim pokrovom tipa 1, kategorije S&A
Fibre organisers and closures to be used in optical fibre communication systems –
Product specifications – Part 2-4: Sealed dome fibre splice closures Type 1, for
category S&A
ICS 33.180.01 Referenčna številka
SIST EN 50411-2-4:2006(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD
EN 50411-2-4
NORME EUROPÉENNE
May 2006
EUROPÄISCHE NORM
ICS 33.180.99
English version
Fibre organisers and closures to be used
in optical fibre communication systems –
Product specifications
Part 2-4: Sealed dome fibre splice closures
Type 1, for category S & A
Organiseurs et boîtiers de fibres LWL-Spleißkassetten und -Muffen
à utiliser dans les systèmes de für die Anwendung
communication par fibres optiques – in LWL-Kommunikationssystemen –
Spécifications de produits Produktnormen
Partie 2-4: Boîtiers à épissure de fibres Teil 2-4: LWL-Muffen Bauart 1
sous dôme scellés Type 1, mit abgedichteter Haube
pour catégories S & A für die Kategorien S und A
This European Standard was approved by CENELEC on 2005-12-01. 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, 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: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50411-2-4:2006 E
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EN 50411-2-4:2006 – 2 –
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 50411-2-4 on
2005-12-01.
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) 2006-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-12-01
__________
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– 3 – EN 50411-2-4:2006
Fibre organisers and closures to be used in optical fibre communication systems – Product specifications
Part 2-4: Sealed dome fibre splice closures Type 1, for category S & A
Description Performance
Construction: Sealed dome ended Applications:
Cable seals: Heat activated and or cold applied Optical fibre cable networks
IEC 61753-1 category S
for underground;
Fibre management: Single Circuit, Single Element,
Multiple Element and/or
IEC 61753-1 category A
for aerial;
Single/Multiple Ribbon
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 60794-2 Optical fibre cables – Part 2: Indoor cables – Sectional specification (IEC 60794-2)
EN 60794-3 Optical fibre cables – Part 3: Sectional specification – Outdoor cables (IEC 60794-3)
1)
EN 61753-1 Fibre optic interconnecting devices and passive components – Part 1: General and guidance for
performance standard (IEC 61753-1)
EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and measurement
procedures (IEC 61300 series)
ETS 300 019 Equipment Engineering (EE) - Environmental conditions and environmental tests for
telecommunication equipment
Construction and splice capacity: Variant: Number fibre splices - Maximum capacity &
fibre management system – SC, SE, SR, ME and MR
S organiser M organiser
Single Single Single Multiple Multiple
H
Circuit Element Ribbon Element Ribbon
(SC) (SE) (SR) (ME) (MR)
G
A
72
D
splices
F
B B B B
B
12 72 36 96
splices splices splices splices
C C C C
24 144 72 144
C
splices splices splices splices
E
A
D D D D
48 288 144 576
splices splices splices splices
E E E
84 216 144
splices splices splices
F F F
144 432 288
splices splices splices
G G G G
192 624 384 288
splices splices splices splices
H H H H
240 864 432 1 152
splices splices splices splices
1)
At draft stage.
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EN 50411-2-4:2006 – 4 –
Contents
1 Scope. 5
1.1 Product definition. 5
1.2 Operating environment.5
1.3 Reliability . 5
1.4 Quality assurance. 5
1.5 Allowed fibre and cable types. 5
2 Normative references. 5
3 Description. 6
3.1 Closure housing . 6
3.2 Closure overpressure safety . 7
3.3 Cable seals. 7
3.4 Organiser system . 8
3.5 Materials. 8
3.6 Colour and marking. 8
4 Variants. 9
5 Dimensional requirements . 13
5.1 Dimensions of closures for Multiple Element and Multiple Ribbon fibres. 13
5.2 Dimensions of closures for Single Circuit, Single Element and Single Ribbon . 14
6 Tests . 15
6.1 Sample size. 15
6.2 Test sample preparation . 15
6.3 Test and measurement methods . 16
6.4 Test sequence. 16
6.5 Pass/fail criteria. 16
7 Test report. 17
8 Performance requirements. 17
8.1 Dimensional and marking requirements. 17
8.2 Sealing, optical and appearance performance criteria. 17
8.3 Mechanical sealing performance requirements . 18
8.4 Environmental sealing performance requirements. 22
8.5 Mechanical optical performance requirements . 24
8.6 Environmental optical performance requirements. 25
Annex A (informative) Fibre for test sample details . 26
Annex B (informative) Sample size and product sourcing requirements. 27
Annex C (informative) Families of organiser systems covered in this standard. 28
Annex D (informative) Dimensions of organisers for Multiple Element and Multiple Ribbon
fibres. 30
Annex E (informative) Dimensions of S organisers for Single Circuit, Single Element
and Single Ribbon . 31
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– 5 – EN 50411-2-4:2006
1 Scope
1.1 Product definition
This specification contains the initial, start of life dimensional, optical, mechanical and environmental
performance requirements of a fully installed splice closure in order for it to be categorised as an EN
standard product.
1.2 Operating environment
The tests selected combined with the severity and duration are representative of an outside plant for
subterranean and/or aerial environments defined by:
ETS 300 019 class 8.1: underground locations (without earthquake requirement)
IEC 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 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
Although the performance tests are carried out on test samples with dispersion unshifted single mode fibre
(see Annex A), the closure, once tested according to this product specification, will be also suited for other
fibre types like dispersion shifted, non-zero dispersion shifted and multi-mode fibres.
This closure standard allows both singlemode and multimode fibre to be used and covers all IEC standard
optical fibre cables with their various fibre capacities, types and designs. This includes, but is not limited to,
optical fibre cable standards EN 60794-2 (indoor), EN 60794-3 (outdoor).
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 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for class B
single-mode fibres (IEC 60793-2-50)
EN 60794-2 Optical fibre cables – Part 2: Indoor cables – Sectional specification (IEC 60794-2)
EN 61300 series Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures (IEC 61300 series)
EN 61300-2-1 Part 2-1: Tests – Vibration (sinusoidal)
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EN 50411-2-4:2006 – 6 –
EN 61300-2-4 Part 2-4: Tests – Fibre/cable retention
EN 61300-2-5 Part 2-5: Tests – Torsion/twist
EN 61300-2-10 Part 2-10: Test – Crush resistance
EN 61300-2-12 Part 2-12: Tests – Impact
EN 61300-2-22 Part 2-22: Tests – Change of temperature
EN 61300-2-23 Part 2-23: Tests – Sealing for non-pressurised closures of fibre optic devices
EN 61300-2-26 Part 2-26: Tests – Salt mist
EN 61300-2-33 Part 2-33: Tests – Assembly and disassembly of closures
EN 61300-2-34 Part 2-34: Tests – Resistance to solvents and contaminating fluids
EN 61300-2-37 Part 2-37: Tests – Cable bending for closures
EN 61300-2-38 Part 2-38: Tests – Sealing for pressurised closures of fibre optic devices
EN 61300-3-1 Part 3-1: Examinations and measurements – Visual examination
EN 61300-3-3 Part 3-3: Examinations and measurements – Active monitoring of changes in attenuation
and return loss
EN 61300-3-28 Part 3-28: Examinations and measurements – Transient loss
2)
EN 61753-1 Fibre optic interconnecting devices and passive components – Part 1: General and
guidance for performance standard (IEC 61753-1)
ES 300 019 Equipment Engineering (EE) - Environmental conditions and environmental tests for
telecommunications equipment
3 Description
3.1 Closure housing
An optical closure comprises a closure housing that is attached to the ends of the joined cable sheaths and a
means for containing and protecting the fibres, splices and other passive optical devices.
This is not to be confused with an optical closure for blowing cable or fibre. This comprises an access
housing that allows the interconnection of cable ducts or tubes and is attached to the ends of the ducts or
cables containing empty tubes. However, this document shall be used when air blown fibres are spliced
inside this type of closure.
The fibre management closure provides facilities for the environmental protection, housing for fibre
management systems and sealing of input and output optical cables. In order to comply with the standard,
the optical functionality, physical, geometrical and mechanical requirements are defined.
The design of the closure housing shall allow the jointing of two or more cable ends in the following
configurations or applications:
2)
At draft stage.
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– 7 – EN 50411-2-4:2006
Common base covering:
(T) Track joint configuration used on trunk cable, with minimum of 2 cable entries
(S) Spur joint configuration used on local feeder cable with minimum of 3 cable entries
Common base covering:
(D) Distribution joint configuration used on customer feed cable with minimum of 8 cable entries
NOTE Cable entries can be more than one cable per cable entry port.
The design of the distribution and spur joint closure housing shall allow the joining together of at least one
pair of cables which are not at the end of a cable section, without cutting all fibres between both cable
openings. This application is generally known as distribution joint or external node, but also called a mid-span
closure or balloon splice.
It is desirable that the closure can be re-opened when necessary without interruption or disturbance of the
traffic of the live circuits.
3.2 Closure overpressure safety
Overpressure can build up in sealed closures due to temperature differentials, or due to atmospheric
pressure changes over a period of time, or due to flash testing of the seals after installation, or due to
incorrect installation techniques. Care should be taken when opening a sealed closure.
Provisions shall be made that overpressure is exhausted when opening the closure prior to complete removal
of the cover.
For air blown fibre applications an overpressure release system is required for all sealed closures.
3.3 Cable seals
Cable entry seal systems can be either, but not limed to:
(H) Dedicated heat activated heat source, for example, electrical, infrared, hot air or flame
• thermo-shrinkable materials
• hot melt adhesives
• polyethylene injection welding
(R) Dedicated cold applied
• mastic, tapes, pastes, potting compounds, gels and cold adhesives
• o-rings, grommets, rubber shapes, pre-expanded tubing are cold processes
(U) Combined heat activated and cold applied
The fibre management closure allows for a physical housing structure that provides for optical cable fixing,
sealing, anchoring, water and gas blocking, storage and routing up to the input and output fibres of the fibre
management system.
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EN 50411-2-4:2006 – 8 –
3.4 Organiser system
The organiser system provides means for routing, storing and protecting of fibre splices or other passive
optical devices in a predetermined order, from one cable sheath opening to another.
Fibre circuits may be separated to an appropriate separation level. This will limit the risk of interruption of
traffic to those fibres that belong to the same group of circuits.
• Single Circuit (SC) is a fibre management system that is a group of fibres providing one termination or
service of 1 or 2 fibres. In this document a Single Circuit is considered to be a circuit of 2 fibres.
• Single Element (SE) is a fibre management system that is a cable subassembly comprising one or more
optical fibres inside a common covering e.g. tube or inside one groove of a grooved cable (slotted core
cable). Single Elements provide more than one termination or circuit of typically 12 fibres. In this
document a Single Element is considered to be a group of 12 fibres.
• Single Ribbon (SR) is a fibre management system that is a cable subassembly comprising one optical
ribbon. Single Ribbon is a group of fibres providing one termination or service of typically 4, 8 or 12 fibres.
• Multiple Element (ME) is a fibre management system that provides all necessary equipment to connect
a defined number of incoming and outgoing fibres/cables. It comprises storage and protection of fibres
and interconnections in one splice tray for more than one Single Element. Typically splice tray capacities
are between 24 and 144 fibres.
• Multiple Ribbon (MR) fibre management provides all necessary equipment to connect a defined number
of incoming and outgoing fibre ribbons that are generally housed within a singe tube or slot within the
cable. This tube is fixed to the entry and exit ports of the splice tray. It comprises storage and protection
of more than one Single Ribbon, but typically six or more fibre ribbons and their interconnections in a
single splice tray for ribbons between 4 and 36 fibres, but typically 12 fibre ribbons. There are also many
different names for this structure, e.g. mass storage or mass ribbons. Typically splice tray capacities are
between 36 and 144 fibres.
NOTE The families of organiser systems covered in this document are listed in Annex C.
3.5 Materials
All materials that are likely to come in contact with personnel shall meet appropriate health and safety
regulations.
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 that are typically used to
clean and degrease fibres and cables.
The effects of UV light and fungi on all exposed polymeric materials shall not affect product performance.
The effects of fungus and UV light shall be determined by measuring a suitable property (e.g. tensile
strength) both before and after exposure.
Metallic parts shall be resistant to the corrosive influences they may encounter during the lifetime of the
product.
3.6 Colour and marking
Marking/identification of the ‘variant number’ (see Clause 4) to be on the product or packaging label along
with the following:
a) identification of manufacturer;
b) manufacturing date code: year / month.
The preferred colour for the outer closure material is black for polymeric materials.
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– 9 – EN 50411-2-4:2006
4 Variants
Table 1 – Sealed dome fibre splice closure Type 1, for category S - Variants
EN 50411-2-4 – X – X – X – XX – XX – X
1 2 3 4 5 6
Variant No.
Operating environment
X
1
S Subterranean environment
A Aerial environment
Both subterranean and aerial environments
B
Variant No.
Closure application – base number of cables
X
2
T Track closure (2 cables minimum)
S Spur closure (3 cables minimum)
Distribution (8 cables minimum)
D
Variant No.
Cable sealing technology – heat, non-heat or both
X
3
R Cold applied
Heat activated (heat source required)
H
U Universal, both methods in a single cable entry base
Variant No.
Type of organiser system
XX
4
Single Circuit (1 or 2 fibres)
SC S organisers
NOTE in some cases
SE Single Element (4 or more fibres)
an M organiser tray
can be used as SC or
SE organiser tray (by
SR Single Ribbon (4 or more fibres per ribbon)
reducing number of
stored splices per tray)
Multiple Element (two or more units)
ME
M organisers
MR Multiple Ribbon (six or more ribbons 4 fibres per ribbons)
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EN 50411-2-4:2006 – 10 –
Depending on the selection of XX , refer to one of the following Tables 1a, 1b, 1c, 1d and 1e to find XX and
4 5
X :
6
Table 1a – SC tray and closure selection
XX �
5
06 12 18 24 30 36 42 48 54 60 66 72 96 120
SC trays
Maximum
splice
12 24 36 48 60 72 84 96 108 120 132 144 192 240
capacity
(reference)
X Closure
6
B
C
D
E
F
G
NOTE A SC tray contains 2 fibre splices per tray.
Table 1b – SE tray and closure selection
XX �
5
01 02 03 04 05 06 07 08 12 16 18 24 36 42 48 52 60 72
SE tray
Maximum
splice
12 24 36 48 60 72 84 96 144 192 216 288 432 504 576 624 720 864
capacity
(reference)
X Closure
6
B
C
D
E
F
G
H
NOTE A SE tray contains 12 fibre splices per tray.
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– 11 – EN 50411-2-4:2006
Table 1c – SR tray and closure selection
XX �
5
2 4 5 6 7 8 9 10 12 16 18 24 36
SR tray
Maximum
splice
24 48 60 72 84 96 108 120 144 192 216 288 432
capacity
(reference)
X Closure
6
B
C
D
E
F
H
NOTE 1 A SR tray has 1 ribbon per tray.
NOTE 2 A ribbon has 12 fibres. When using ribbons with a different fibre count than 12 fibres per ribbon, the maximum
splice capacity shall be changed accordingly.
Table 1d – ME splice tray and closure selection
XX �
5
1A 2A 3A 1B 2B 3B 4B 5B 6B 1D 2D 3D 4D 5D 6D 7D 8D
ME tray
Maximum
splice
capacity 24 48 72 24 48 72 96 120 144 72 144 216 288 360 432 504 576
(reference
)
X Closure
6
A
B
C
D
NOTE 1 ME- Size A and ME- Size B trays have a minimum of 24 splices per tray.
NOTE 2 ME- Size D trays have a minimum of 144 splices per tray.
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EN 50411-2-4:2006 – 12 –
Table 1e – MR splice tray and closure selection
XX �
5
1D 2D 3D 4D 6D 8D 1H 2H 3H 4H 5H 6H 7H 8H
MR tray
Maximum
splice
36 72 108 144 216 288 144 288 432 576 720 864 1 008 1 152
capacity
(reference)
X Closure
6
G
H
NOTE 1 MR- Size D trays have a minimum of 24 splices/fibres per tray.
NOTE 2 MR- Size H trays have a minimum of 144 splices/fibres per tray.
NOTE 3 A ribbon has 12 fibres. When using ribbons with a different fibre count than 12 fibres per ribbon, the maximum
splice capacity shall be changed accordingly.
This product specification concerns organisers of only one “Type of organiser system” at a given fibre
separation level in parameter XX . If multiple “Types of organisers/levels” in a single closure is required when
4
ordering; then, typically double the number of SC trays can be inserted in the same organiser envelope as
SE.
Therefore
Maximum splice capacity ≥ 2 * (number of SC trays) + 12 * (number of SE trays)
EXAMPLES
EN 50411-2-4 – S – D – H – SC – 06 – E
Distribution closure for underground application with heat activated cable seals, SC fibre management
system with 6 SC trays (12 splices) in a size E closure.
EN 50411-2-4 – A – T – C – MR – 4D – G
A track joint closure for aerial application with cold applied cable seals and MR fibre management with
4 splice trays type MR-D in a size G closure.
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– 13 – EN 50411-2-4:2006
5 Dimensional requirements
5.1 Dimensions of closures for Multiple Element and Multiple Ribbon fibres
F2
F1F1
E
Daniel Daems
Figure 1 – Outline dimensions of M closure
Table 2 – M Closure dimensions
Maximum capacity
Outline M closure envelope dimensions
Number of fibres
(max.)
(without storage basket)
Closure
M organiser system Overall Overall Overall
size
length diameter diameter
mm mm mm
Multiple Element Multiple Ribbon
E F1 F2
A < 72 fibres 505
185 265
B < 96 fibres
NA 600
C < 144 fibres
270 312
D < 576 fibres 750
G < 288 fibres 800
NA 275 310
< 1 152 fibres 1 050
H
NOTE Additional information on the organiser system can be found in Annex D.
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EN 50411-2-4:2006 – 14 –
5.2 Dimensions of closures for Single Circuit, Single Element and Single Ribbon
F1F1
F1F1
F1F1
F2F2
F2F2
F2F2
H (H (H (DDD)))
DDD
G (G (G (DDD)))
CCC
F (F (F (DDD)))
BBB
E (D)E (D)E (D)
EEE
EEE
EEE
DaDanniieell Da Daeemmss
DDouble stouble staacckk SiSingngllee st stackack
Figure 2 – Outline dimensions of the S closures
Table 3 – S Closure with SC, SE and SR trays
Maximum capacity
Outline S closure envelope dimensions
Number of fibres
(max.)
(without storage basket)
Closure
S organiser system (common) Overall Overall Overall
size
length diameter diameter
Single Single Single
mm mm mm
Circuit Element Ribbon
E F1 F2
a
B 12f 72f 48f 185 265
600
Single
C 24f 144f 72f
stacks
270 312
48f 288f 144f
D 750
E 84f 216f 144f 540
F 144f 432f 288f 620
Double
275 310
stacks
192f 624f 384f
G 800
H N/A 864f 432f 1 050
NOTE Additional information on the organiser system can be found in Annex E.
a
Closure B can also contain M organiser splice trays.
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– 15 – EN 50411-2-4:2006
6 Tests
6.1 Sample size
Separate test samples for sealing performance and optical evaluation may be used. For the purposes of this
standard, a sealing performance test sample is defined as a closure installed with several cable ends.
Optical test samples shall be constructed as described in 6.2. Due to their complexity, consecutive testing on
the same optical sample is allowed.
The minimum recommended sample sizes are given in Annex B.
6.2 Test sample preparation
Sealing performance test samples shall be provided with an air pressure test access valve. The length of the
cables extending the closure shall be at least 1 m. The open ends of the cables shall be sealed. Each
applicable cable type with minimum and maximum cable dimensions shall be represented in the test
program.
Optical test samples shall be constructed in such a way that they will cover all allowed functions of a track
joint and/or distribution joint. This shall be realised by building optical circuits for each fibre separation level
(typical SC, SE, SR, ME or MR splicing and uncut fibre storage). The fibres for the optical test samples are
covered in Annex A.
Optical test sample construction:
Both extremities of a looped cable are terminated in the Track joint closure (see Figure 3a). The length of the
looped cable is chosen in such a way that it is longer than the “dead zone” of an OTDR. This will allow the
location of the potential causes of optical losses and differentiate if a change in signal is induced by the
organiser system in a single location or distributed over the whole circuit length. The required length depends
on the selected pulse width and
...
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