prEN 50377-14-1
(Main)Connector sets and interconnect components to be used in optical fibre communication systems — Product specifications Part 14-1: Simplex and Duplex Cords with IEC 60793-2-50 singlemode category B1.3 and B6 fibre for Category C according to IEC 61753-1.
Connector sets and interconnect components to be used in optical fibre communication systems — Product specifications Part 14-1: Simplex and Duplex Cords with IEC 60793-2-50 singlemode category B1.3 and B6 fibre for Category C according to IEC 61753-1.
This standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements that an assembled singlemode patch cord with cylindrical ferruled connectors shall meet in order for it to be categorised as an EN standard product. Since different variants and grades of performance are permitted, product marking details are given in 3.4 and Clause 4.
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-Datenübertragungssysteme - Produktnormen - Teil 14-1: Verbindungskabel für Einmodenfasern der Kategorien B1.1 und B1.3 nach IEC 60793-2-50 für die Kategorie C
Konektorski sestavi in povezovalne komponente za optične komunikacijske sisteme - Specifikacija izdelka - 14-1. del: Povezovalne vrvice z enorodnim optičnim vlaknom po EN 60793-2-50 kategorij B1.1 in B1.3 za kategorijo C
General Information
- Status
- Not Published
- Parallel Committee
- IEC/SC 86B - IEC_SC_86B
- Current Stage
- 3098 - Decision to drop project - Standstill maintained / released - Consensus building
- Start Date
- 30-Apr-2015
- Completion Date
- 10-Feb-2026
Relations
- Effective Date
- 07-Jun-2022
Overview
prEN 50377-14-1 is a CLC draft European product specification for singlemode patch cords used in optical fibre communication systems. It defines the start-of-life dimensional, optical, mechanical and environmental performance requirements that an assembled patch cord with cylindrical-ferruled connectors must meet to be classed as an EN product for an EN/IEC Category C environment. The standard targets typical indoor patch cords and work‑area cords (tip‑to‑tip lengths commonly 1–10 m) and references singlemode fibre categories from EN/IEC optical‑fibre specifications.
Key Topics and Requirements
- Product scope and definition: assembled simplex and duplex patch cords (including work‑area cords) with cylindrical ferrule plugs and dust caps.
- Fibre types: singlemode fibres per EN 60793‑2‑50 (document references B1.x classes including B1.3; draft texts also reference B1.1).
- Performance grades:
- Attenuation grades (B and C) with quantitative limits and ensured random‑mated performance (measured per EN 61300‑3‑34); grade B is the tighter/low‑loss grade, grade C allows higher insertion loss.
- Return loss grades (Grade 1 ≧60 dB, Grade 2 ≧45 dB, Grade 3 ≧35 dB when mated).
- Dimensional and marking rules: outline dimensions, length tolerances, connector type coding, and mandatory marking (manufacturer ID, date code, part number, variant ID).
- Test methods: test and measurement methods come from the EN 61300 series (attenuation, return loss, mechanical retention, flex, temperature, transient loss, etc.). Measurements specified at common singlemode wavelengths (≈1310, 1550, 1625 nm).
- Environmental class: tests and severities represent IEC 61753‑1 Category C (controlled indoor environment). Sample selection, test sequencing and pass/fail criteria are defined; typical test sample length = 5 m.
Applications
- Specification for manufacturers designing and producing indoor patch cords, jumpers and work‑area cords for data centers, central offices, enterprise cabling and fibre distribution frames.
- Procurement and QA teams use it to specify acceptance criteria for supplied connectorized assemblies.
- Test laboratories and certification bodies apply the referenced EN/IEC test methods to verify start‑of‑life optical/mechanical performance.
- System integrators and network operators reference it when ensuring interoperability and predictable random‑mate performance across connector sources.
Who should use this standard
- Fiber optic cable and connector manufacturers
- Test and qualification labs
- Procurement/specification engineers in telecom, datacom and enterprise IT
- Standards writers and product compliance teams
Related Standards
- EN 50377 series (connector product specifications)
- EN 60793‑2‑50 (singlemode fibre sectional spec)
- EN 60794‑2‑50 (indoor cable family spec)
- EN 61300 series (test & measurement methods)
- EN 61753‑1 (performance class guidance)
- EN 61755‑1 and ETSI TS 100 671 (connector optical interfaces/conformance)
Keywords: prEN 50377-14-1, patch cord, optical fibre, singlemode, connector sets, interconnect components, attenuation, return loss, EN 50377, IEC 61753-1, EN 61300.
Get Certified
Connect with accredited certification bodies for this standard
TL 9000 QuEST Forum
Telecommunications quality management system.

ANCE
Mexican certification and testing association.

Intertek Slovenia
Intertek testing, inspection, and certification services in Slovenia.
Sponsored listings
Frequently Asked Questions
prEN 50377-14-1 is a draft published by CLC. Its full title is "Connector sets and interconnect components to be used in optical fibre communication systems — Product specifications Part 14-1: Simplex and Duplex Cords with IEC 60793-2-50 singlemode category B1.3 and B6 fibre for Category C according to IEC 61753-1.". This standard covers: This standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements that an assembled singlemode patch cord with cylindrical ferruled connectors shall meet in order for it to be categorised as an EN standard product. Since different variants and grades of performance are permitted, product marking details are given in 3.4 and Clause 4.
This standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements that an assembled singlemode patch cord with cylindrical ferruled connectors shall meet in order for it to be categorised as an EN standard product. Since different variants and grades of performance are permitted, product marking details are given in 3.4 and Clause 4.
prEN 50377-14-1 is classified under the following ICS (International Classification for Standards) categories: 33.180.20 - Fibre optic interconnecting devices. The ICS classification helps identify the subject area and facilitates finding related standards.
prEN 50377-14-1 has the following relationships with other standards: It is inter standard links to EN 50377-14-1:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN 50377-14-1 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2009
.RQHNWRUVNLVHVWDYLLQSRYH]RYDOQHNRPSRQHQWH]DRSWLþQHNRPXQLNDFLMVNH
VLVWHPH6SHFLILNDFLMDL]GHONDGHO3RYH]RYDOQHYUYLFH]HQRURGQLP
RSWLþQLPYODNQRPSR(1NDWHJRULM%LQ%]DNDWHJRULMR&
Connector sets and interconnect components to be used in optical fibre communication
systems - Product specifications - Part 14-1: Patch cords with EN 60793-2-50 single
mode category B1.1 and B1.3 fibre for category C
Ta slovenski standard je istoveten z: prEN 50377-14-1:2008
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.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2008
EUROPÄISCHE NORM
ICS
English version
Connector sets and interconnect components to be used in optical fibre
communication systems - Product specifications -
Part 14-1: Patch cords with EN 60793-2-50 single mode category B1.1 and
B1.3 fibre for category C
To be completed To be completed
This draft European Standard is submitted to CENELEC members for CENELEC enquiry.
Deadline for CENELEC: 2009-04-10.
It has been drawn up by CLC/TC 86BXA.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to
change without notice and shall not be referred to as a European Standard.
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
© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Project: 15519 Ref. No. prEN 50377-14-1:2008 E
Draft for Enquiry
1 Foreword
2 This draft European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic
3 interconnect, passive and connectorised components. It is submitted to the CENELEC enquiry.
4 This document is updated to include the performance of the patch cord. It also includes latest attenuation and
5 return loss grades as specified in IEC.
6 __________
Draft for Enquiry
– 3 – prEN 50377-14-1:2008
Connector sets and interconnect components to be used in optical fibre communication systems –
Product specifications
Part 14-1: Patch cords with EN 60793-2-50 single mode category B1.1 and B1.3 fibre for category C
Description Performance
Fibre category: EN 60793-2-50 Application: For use in EN Category C
Types B1.1 and B1.3 (controlled environment)
Cable type: EN 60794-2-50 Attenuation grades: B: ≤ 0,12 dB mean
Type simplex cables (random mate)
≤ 0,25 dB for ≥ 97 %
of measurements
C: ≤ 0,25 dB mean
≤ 0,50 dB for ≥ 97 %
of measurements
Return loss grade: 1: ≥ 60 dB
(random mate) 2: ≥ 45 dB
Related documents:
EN 50377 series Connector sets and interconnect components to be used in optical fibre
communication systems – Product specifications
EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for
class B single-mode fibres (IEC 60793-2-50)
EN 60794-2-50 Optical fibre cables – Part 2-50: Indoor optical fibre cables – Family specification for
simplex and duplex cables for use in terminated cable assemblies (IEC 60794-2-50)
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)
ETSI TS 100 671 Transmission and Multiplexing (TM); Passive optical components; Optical fibre
connectors for single mode optical fibre communication systems; Common
requirements and conformance testing
Outline and maximum dimensions:
Length
Draft for Enquiry
8 Contents
9 1 Scope . 5
10 1.1 Product definition . 5
11 1.2 Intermateability of the plugs . 5
12 1.3 Operating environment . 5
13 1.4 Reliability . 5
14 1.5 Quality assurance . 5
15 2 Normative references . 6
16 3 Description . 6
17 3.1 Plug . 7
18 3.2 Materials . 7
19 3.3 Marking . 7
20 4 Variants . 8
21 5 Dimensional requirements . 9
22 5.1 Outline dimensions . 9
23 6 Tests . 9
24 6.1 Sample size . 9
25 6.2 Test and measurement methods . 9
26 6.3 Test sequence . 9
27 6.4 Pass/fail criteria . 9
28 7 Test report . 9
29 8 Product qualification requirements . 10
30 8.1 Dimensional and marking requirements. 10
31 8.2 Optical performance requirements . 10
32 8.3 Mechanical performance requirements . 12
33 8.4 Environmental performance requirements . 14
34 Annex A (informative) Reference connector details . 15
35 Annex B (normative) Tests, sample size and product sourcing requirements . 16
36 Annex C (normative) Cable bend (coiling) test procedure . 17
37 Bibliography . 18
38 Figures
39 Figure 1 – Length of patch cord . 9
40 Figure 2 – Cable bend (coiling) test set-up . 17
41 Tables
42 Table 1 – Ensured level of random attenuation . 5
43 Table 2 – Connector and Adaptor references. 7
44 Table 3 – Optical performance requirements . 11
45 Table 4 – Mechanical performance requirements . 12
46 Table 5 – Environmental performance requirements . 14
47 Table B.1 – Test, sample size and sourcing . 16
Draft for Enquiry
– 5 – prEN 50377-14-1:2008
49 1 Scope
50 1.1 Product definition
51 This standard contains the initial, start of life dimensional, optical, mechanical and environmental
52 performance requirements which an assembled single-mode patch cord must meet in order for it to be
53 categorised as an EN standard product.
54 Since different variants and grades of performance are permitted, product marking details are given in 3.5
55 and Clause 4.
56 1.2 Intermateability of the plugs
57 Although all products conforming to the requirements of this standard will intermate, the resulting level of
58 random attenuation performance will only be ensured in accordance with Table 1. The intention is that this
59 will be true irrespective of the manufacturing source(s) of the product.
60 When intermating plug variants having different attenuation grades as specified in EN 61755-1, the resulting
61 level of attenuation cannot be assured to be any better than the worst attenuation grade.
62 The intermating of a grade C plug with a grade B plug will result in a grade C level of random attenuation
63 performance.
64 Table 1 – Ensured level of random attenuation
Plug variant / Plug 2
Attenuation grade
C B
C C C
Plug 1
B C B
66 1.3 Operating environment
67 The tests selected combined with the severities and durations are representative of an EN 61753-1
68 Category C environment.
69 1.4 Reliability
70 Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with
71 this standard does not guarantee the reliability of the product. This should be predicted using a recognised
72 reliability assessment programme.
73 1.5 Quality assurance
74 Compliance with this standard does not guarantee the manufacturing consistency of the product. This should
75 be maintained using a recognised quality assurance programme.
Draft for Enquiry
76 2 Normative references
77 The following referenced documents are indispensable for the application of this document. For dated
78 references, only the edition cited applies. For undated references, the latest edition of the referenced
79 document (including any amendments) applies.
EN 50377 series Connector sets and interconnect components to be used in optical fibre
communication systems – Product specifications
EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for
class B single-mode fibres (IEC 60793-2-50)
EN 60794-2-50 Optical fibre cables – Part 2-50: Indoor optical fibre cables – Family specification
for simplex and duplex cables for use in terminated cable assemblies
(IEC 60794-2-50)
EN 61300-2-4 Part 2-4: Tests – Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-22 Part 2-22: Tests – Change of temperature (IEC 61300-2-22)
EN 61300-2-42 Part 2-42: Tests – Static side load for connectors (IEC 61300-2-42)
EN 61300-2-44 Part 2-44: Tests – Flexing of the strain relief of fibre optic devices
(IEC 61300-2-44)
EN 61300-3-3 Part 3-3: Examinations and measurements – Active monitoring of changes in
attenuation and return loss (IEC 61300-3-3)
EN 61300-3-6:2003 Part 3-6: Examinations and measurements – Return loss (IEC 61300-3-6:2003)
EN 61300-3-22 Part 3-22: Examinations and measurements – Ferrule compression force
(IEC 61300-3-22)
EN 61300-3-28 Part 3-28: Examinations and measurements – Transient loss (IEC 61300-3-28)
EN 61300-3-34:2002 Part 3-34: Examinations and measurements – Attenuation of random mated
connectors (IEC 61300-3-34:2001)
EN 61753-1 Fibre optic interconnecting devices and passive components performance standard –
Part 1: General and guidance for performance standards (IEC 61753-1)
EN 61755-1 Fibre optic connector optical interfaces – Part 1: Optical interfaces for single mode non-
dispersion shifted fibres – General and guidance (IEC 61755-1)
80 3 Description
81 For the purpose of this document a patch cord is defined as a short length of cable with connector plugs
82 assembled at both cable ends. Typical length (but not limited to) is 1 m to 10 m, measured from tip to tip at
83 the extremes. Patch cords are installed in mechanical protected locations (inside cabinets, distribution
84 frames and enclosures).
85 The document also applies to work area cords which are typically more ruggedised (larger diameter) and
86 used in mechanical less protected locations. For the purpose of this document both patch cords and work
87 area cords are called patch cords.
Draft for Enquiry
– 7 – prEN 50377-14-1:2008
88 3.1 Plug
89 The plug features a cylindrical ferrule. It has a single male key which is used to limit and may be used to
90 orientate, the relative rotation between mated connectors.
91 A cover (dust cap) to protect the ferrule end faces when the connectors are in the unmated condition shall be
92 provided.
93 The plug shall meet the relevant product specification as listed in Table 2.
94 Table 2 – Connector and Adaptor references
Connector or adaptor Reference
FC EN 50377-2 series
SC EN 50377-4 series
SC-RJ EN 50377-6 series
LC EN 50377-7 series
LSH EN 50377-8-series
MU EN 50377-10 series
LX.5 EN 50377-13 series
96 3.2 Materials
97 Materials which are not specified or which are not specifically described are left to the discretion of the
98 manufacturer.
99 T
...




Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...