IEC 60794-1-124:2025

Optical fibre cables - Part 1-124: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Installation test for microduct cabling, Method E24

IEC 60794-1-124:2025 contains test procedures, referred to as Method E24, for evaluating the behaviour of microduct cabling (microduct optical cable, fibre unit or hybrid cable etc.) when blown into a microduct or protected microduct. This document describes two blowing track layouts: Method A consists of two mandrels and two long straight sections in between (same curvature). Method B consists of 3 mandrels. The middle mandrel forces the cable to experience both left- and right-hand bending, which is a feature of any realistic blowing route. In addition, this document describes an optional procedure to check the capability of blowing out an installed cable. This first edition cancels and replaces Method E24 of the first edition of IEC 60794‑1‑21 published in 2015 and Amendment 1:2020. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of a blowing route (see Figure 2) which includes a change in the direction of curvature. This was achieved by introducing a third mandrel;
b) addition of Annex A (Figure A.1 which shows a practical implementation of the blowing route;
c) addition of Annex B which describes the so-called Crash Test;
d) addition of Annex C which describes a cable blowing out procedure.

Câbles à fibres optiques - Partie 1-124: Spécification générique - Procédures fondamentales d’essais des câbles optiques - Méthodes d’essais mécaniques - Essai d’installation pour un câblage en microconduits, Méthode E24

IEC 60794-1-124: 2025 donne les procédures d’essai, appelées Méthode E24, permettant d’évaluer le comportement d’un câblage en microconduits (câble optique en microconduits, unité de fibres, câble hybride, etc.) lors d’un soufflage appliqué dans un microconduit ou un microconduit protégé. Le présent document décrit deux dispositions de chemin de soufflage: La Méthode A se base sur deux mandrins, avec entre ceux-ci deux longues sections droites (de même courbure). La Méthode B se base sur 3 mandrins. Le mandrin central exerce une contrainte sur le câble pour définir à la fois des courbures vers la gauche et des courbures vers la droite, ce qui est caractéristique d’un chemin de soufflage réaliste. En outre, le présent document décrit une procédure facultative pour vérifier la capacité à extraire par soufflage un câble installé. Cette première édition annule et remplace la méthode E24 de la première édition de l’IEC 60794‑1‑21 parue en 2015 et son Amendement 1:2020. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) ajout d'un chemin de soufflage (voir la Figure 2), qui introduit un changement de direction dans la courbure. Cela a été possible en utilisant un troisième mandrin;
b) ajout de l'Annexe A (Figure A.1, qui présente une mise en œuvre pratique du chemin de soufflage);
c) ajout de l'Annexe B, qui décrit l'essai intitulé "essai de collision";
d) ajout de l'Annexe C, qui décrit une procédure d’extraction par soufflage d'un câble.

General Information

• Status: Published
• Publication Date: 04-Jun-2025
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Current Stage: PPUB - Publication issued
• Start Date: 05-Jun-2025
• Completion Date: 13-Jun-2025

Relations

• Replaces: IEC 60794-1-21:2015 - Optical fibre cables - Part 1-21: Generic specification - Basic optical cable test procedures - Mechanical tests methods
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60794-1-124 ®
Edition 1.0 2025-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-124: Generic specification – Basic optical cable test procedures –
Mechanical tests methods – Installation test for microduct cabling, Method E24

Câbles à fibres optiques –
Partie 1-124: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Méthodes d’essais mécaniques – Essai d’installation pour un
câblage en microconduits, Méthode E24
ICS 33.180.10  ISBN 978-2-8327-0457-8

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– 2 – IEC 60794-1-124:2025 © IEC 2025
CONTENTS
FOREWORD. 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Sample . 6
5 Apparatus . 7
6 Ambient conditions . 7
7 Procedure . 8
8 Requirements . 8
9 Details to be specified . 9
10 Details to be reported . 9
11 Test track setup . 10
Annex A (informative) Test track – Practical implementation of the blowing route
Method B (Configuration with 3 mandrels) . 12
Annex B (informative) Crash test . 13
Annex C (informative) Blowing out . 14
Bibliography . 15

Figure 1 – Schematic representation of test tracks for Method A – Configuration with 2
mandrels . 11
Figure 2 –Schematic representation of the test track for Method B – Configuration with
3 mandrels . 11
Figure A.1 – Schematic diagram of the practical implementation of the test track for
Method B – Configuration with 3 mandrels . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-124: Generic specification – Basic optical cable test procedures –
Mechanical tests methods – Installation test for microduct cabling,
Method E24
FOREWORD
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IEC 60794-1-124 has been prepared by subcommittee 86A: Fibres and cables: of IEC technical
committee 86: Fibre optics. It is an International Standard.
This first edition cancels and replaces Method E24 of the first edition of IEC 60794-1-21
published in 2015 and Amendment 1:2020. This edition constitutes a technical revision.

– 4 – IEC 60794-1-124:2025 © IEC 2025
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of a blowing route (see Figure 2) which includes a change in the direction of
curvature. This was achieved by introducing a third mandrel;
b) addition of Annex A (Figure A.1 which shows a practical implementation of the blowing
route;
c) addition of Annex B which describes the so-called Crash Test;
d) addition of Annex C which describes a cable blowing out procedure.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2552/FDIS 86A/2577/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60794 series, published under the general title Optical fibre, can be
found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
INTRODUCTION
The national working committee DKE/UK 412.6 "Optical fibres and optical fiber cables" of the
DKE German Commission for Electrical, Electronic & Information Technologies (www.dke.de)
is responsible for this document.
This document was prepared in cooperatio
...