oSIST prEN IEC 60794-1-127:2025

Optical fibre cables - Part 1-127: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Indoor simulated installation test, method e27

Câbles à fibres optiques - Partie1-127: Spécification générique - Procédures fondamentales d’essais des câbles optiques - Méthodes d’essais mécaniques - Essai d'installation simulée en intérieur, méthode e27

Optični kabli - 1-127. del: Splošna specifikacija - Osnovni preskusni postopki za optične kable - Mehanske preskusne metode - Preskus simulirane namestitve v notranjih prostorih, metoda e27

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Apr-2025
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: MOC - Mobile Communications
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 26-Feb-2025
• Due Date: 16-Jul-2025
• Completion Date: 22-Apr-2025
• Ref Project: prEN IEC 60794-1-127:2025 - Optical fibre cables - Part 1-127: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Indoor simulated installation test, method e27

Relations

• Splited From: SIST EN 60794-1-21:2015 - Optical fibre cables -- Part 1-21: Generic specification - Basic optical cable test procedures - Mechanical tests methods (IEC 60794-1-21:2015)
• Effective Date: 09-Sep-2025
• Splited From: SIST EN 60794-1-21:2015/A1:2020 - Optical fibre cables - Part 1-21: Generic specification - Basic optical cable test procedures - Mechanical tests methods (IEC 60794-1-21:2015/A1:2020)
• Effective Date: 09-Sep-2025

Overview

prEN IEC 60794-1-127:2025 specifies the Indoor simulated installation test (Method E27) for optical fibre cables. Published as part of the IEC 60794-1-1xx series, this mechanical test method is intended to reproduce demanding indoor routing conditions - tight corners, attachment points and cable storage - to assess cable robustness and optical performance for telecommunication and hybrid optical/electrical cables. The method replaces and revises the former E27 in IEC 60794-1-21:2015 and is primarily aimed at evaluating cables that use bending loss insensitive fibres.

Key topics and technical requirements

• Scope: Applies to optical fibre cables used with telecommunication equipment and cables combining optical fibres and electrical conductors.
• Sample length: A continuous cable long enough for the procedure; a minimum of 100 m is recommended.
• Apparatus: Simulated wall/fixture (stud or substrate) with sharp corners and attachment points. Metallic corners are recommended to avoid unwanted indentation artifacts.
• Test sequence (summary):
  • Multiple tight corner bends (14 × 90° corners, 1 mm apparatus corner radius) with minimal manual tension
  • Single 90° corner bend under 2 kg load
  • Single 90° corner bend under rated residual load
  • Two 10 mm mandrel wraps
  • 30 attachment points (staples, ties, adhesives as specified)
• Optical monitoring: If required, use optical monitoring per IEC 60793-1-46; measure attenuation before and after the test and calculate change in attenuation.
• Acceptance guidance: Typical stapling-related attenuation change recommended not to exceed 0.20 dB at 1550 nm (single‑mode) and 0.40 dB at 1300 nm (multimode). Final acceptance criteria are specified in the relevant product specification.
• Customizable parameters: substrate type, number/radius of bends, attachment method, test temperature, residual load, and acceptance limits must be stated in the product specification.

Practical applications

• Validates cable designs for demanding indoor deployments where routing around sharp corners, staples and constrained storage is expected (e.g., office, residential and data‑centre interiors).
• Demonstrates mechanical robustness and optical performance stability after simulated installation stress.
• Useful during product development, quality control, type testing and supplier qualification for indoor optical fibre cables.

Who should use this standard

• Cable manufacturers and R&D teams designing indoor optical fibre cables
• Independent test laboratories and certification bodies
• Telecommunications installers, specifiers and procurement teams writing product acceptance criteria
• Standards committees and compliance engineers assessing mechanical/optical resilience

Related standards

• IEC 60794-1-1 - Generic specification: general requirements and definitions
• IEC 60794-1-2 - Basic optical cable test procedures: general guidance and cross-references
• IEC 60793-1-46 - Measurement methods for monitoring changes in attenuation (optical monitoring)

Keywords: optical fibre cables, indoor simulated installation test, IEC 60794-1-127, mechanical test, corner bends, stapling, mandrel wrap, attenuation, bending loss insensitive fibre.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2025
Optični kabli - 1-127. del: Splošna specifikacija - Osnovni preskusni postopki za
optične kable - Mehanske preskusne metode - Preskus simulirane namestitve v
notranjih prostorih, metoda e27
Optical fibre cables - Part 1-127: Generic specification - Basic optical cable test
procedures - Mechanical tests methods - Indoor simulated installation test, method e27
Câbles à fibres optiques - Partie1-127: Spécification générique - Procédures
fondamentales d’essais des câbles optiques - Méthodes d’essais mécaniques - Essai
d'installation simulée en intérieur, méthode e27
Ta slovenski standard je istoveten z: prEN IEC 60794-1-127:2025
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

86A/2538/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60794-1-127 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-02-21 2025-05-16
SUPERSEDES DOCUMENTS:
86A/2459/CD, 86A/2535/CC
IEC SC 86A : FIBRES AND CABLES
SECRETARIAT: SECRETARY:
France Mr Laurent Gasca
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Optical fibre cables - Part 1-127: Generic specification - Basic optical cable test procedures -
Mechanical tests methods - Indoor simulated installation test, Method E27

PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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IEC CDV 60794-1-127 ED1 © IEC 2025 2 86A/2538/CDV
1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 3
4 INTRODUCTION . 5
5 1 Scope . 6
6 2 Normative references . 6
7 3 Terms and definitions . 6
8 4 Method E27: Indoor simulated installation test . 6
9 4.1 Object . 6
10 4.2 Sample . 7
11 4.3 Apparatus . 7
12 4.4 Procedure . 8
13 4.5 Requirements . 9
14 4.6 Details to be specified . 9
15 4.7 Details to be reported . 9
17 Figure 1 – Indoor installation simulation apparatus. 7
18 Figure 2 – Stapling and bending test fixture . 7
IEC CDV 60794-1-127 ED1 © IEC 2025 3 86A/2538/CDV
21 INTERNATIONAL ELECTROTECHNICAL COMMISSION
22 ____________
24 OPTICAL FIBRE CABLES –
26 Part 1-127: Generic specification –
27 Basic optical cable test procedures –
28 Mechanical tests methods - Indoor simulated installation test, method E27
30 FOREWORD
31 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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58 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
59 indispensable for the correct application of this publication.
60 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
61 rights. IEC shall not be held responsible for identifying any or all such patent rights.
62 International Standard IEC 60794-1-21 has been prepared by subcommittee 86A: Fibres and cables, of IEC
63 technical committee 86: Fibre optics.
64 IEC 60794-1-127 has been prepared by subcommittee 86A: Fibres and cables, of IEC
65 technical committee 86: Fibre optics. It is an International Standard.
67 This first edition cancels and replaces Method E27 of the first edition of IEC 60794-1-21:2015,
68 which will be withdrawn. It constitutes a technical revision.
69 This edition includes the following significant technical changes with respect to the previous
70 edition:
71 a) added a new clause “4.7 Details to be reported”;
72 The text of this is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
IEC CDV 60794-1-127 ED1 © IEC 2025 4 86A/2538/CDV
74 Full information on the voting for its approval can be found in the report on voting indicated in
75 the above table.
76 The language used for the development of this International Standard is English.
77 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
78 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
79 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
80 described in greate
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