IEC 60794-1-219:2021

Optical fibre cables - Part 1-219: Generic specification - Basic optical cable test procedures - Material compatibility test, method F19

IEC 60794-1-219:2021 applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, as well as hybrid telecommunication cables having a combination of both optical fibres and electrical conductors. The object of this document is to define test procedures to be used in establishing uniform requirements for the material compatibility performance of cables, cable components, and cable subassemblies. Compatibility of materials within a cable has the potential to involve a range of material pairs. However, experience has shown that the most pertinent evaluations are of the cable filling and flooding materials' interactions with other materials in the cable. NOTE Throughout the document the wording “optical cable” can also include optical fibre units, microduct fibre units, etc. See IEC 60794-1-2 for general requirements and definitions, as well as for a reference guide to test methods of all types.

Câbles à fibres optiques - Partie 1-219 : Spécification générique - Procédures fondamentales d’essais des câbles optiques - Essai de compatibilité des matériaux, Méthode F19

IEC 60794-1-219:2021 s’applique aux câbles à fibres optiques destinés à être utilisés avec les équipements de télécommunication et les dispositifs utilisant des techniques analogues, ainsi qu’aux câbles de télécommunication hybrides constitués d’une combinaison de fibres optiques et de conducteurs électriques. L’objet du présent document est de définir les procédures d’essai à utiliser pour fixer des exigences homogènes relatives à la compatibilité des matériaux des câbles, organes de câble et sous-ensembles de câble. La compatibilité des matériaux au sein d’un câble implique potentiellement une gamme de paires de matériaux. Cependant, l’expérience a montré que les évaluations les plus pertinentes portent sur les interactions des matériaux de remplissage et d’enduction avec les autres matériaux du câble. NOTE Tout au long du présent document, l’expression "câble optique" peut également inclure des unités de fibres optiques, des unités de fibres en microconduits, etc. Voir l’IEC 60794-1-2 pour les exigences générales et les définitions, ainsi que le guide de référence de tous les types de méthodes d’essai.

General Information

• Status: Published
• Publication Date: 21-Nov-2021
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Current Stage: PPUB - Publication issued
• Start Date: 22-Nov-2021
• Completion Date: 24-Dec-2021

Standards Content (Sample)

IEC 60794-1-219 ®
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-219: Generic specification – Basic optical cable test procedures – Material
compatibility test, method F19

Câbles à fibres optiques –
Partie 1-219: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Essai de compatibilité des matériaux, méthode F19

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IEC 60794-1-219 ®
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-219: Generic specification – Basic optical cable test procedures –

Material compatibility test, method F19

Câbles à fibres optiques –
Partie 1-219: Spécification générique – Procédures fondamentales d’essais des

câbles optiques – Essai de compatibilité des matériaux, méthode F19

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-1053-9

– 2 – IEC 60794-1-219:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Method F19 – Material compatibility test . 6
4.1 Object . 6
4.2 Sample . 6
4.2.1 General . 6
4.2.2 Completed cable samples . 6
4.2.3 Individual components samples . 6
4.3 Ageing procedure . 8
4.4 Applicable tests . 8
4.4.1 General . 8
4.4.2 Visual inspection . 10
4.4.3 Physical testing . 10
4.5 Details to be specified . 12
Bibliography . 13

Figure 1 – Typical test set-up for coloured fibre wiping test . 11

Table 1 – Tests applicable for material compatibility evaluation . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-219: Generic specification – Basic optical cable
test procedures – Material compatibility test, method F19

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60794-1-219 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2138/FDIS 86A/2143/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.

– 4 – IEC 60794-1-219:2021 © IEC 2021
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/standardsdev/publications.
A list of all parts in the IEC 60794 series, published under the general title Optical fibre cables,
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,
• replaced by a revised edition, or
• amended.
OPTICAL FIBRE CABLES –
Part 1-219: Generic specification – Basic optical cable
test procedures – Material compatibility test, method F19

1 Scope
This part of IEC 60794 applies to optical fibre cables for use with telecommunication equipment
and devices employing similar techniques, as well as hybrid telecommunication cables having
a combination of both optical fibres and electrical conductors.
The object of this document is to define test procedures to be used in establishing uniform
requirements for the material compatibility performance of cables, cable components, and cable
subassemblies.
Compatibility of materials within a cable has the potential to involve a range of material pairs.
However, experience has shown that the most pertinent evaluations are of the cable filling and
flooding materials' interactions with other materials in the cable.
NOTE Throughout the document the wording “optical cable” can also include optical fibre units, microduct fibre
units, etc.
See IEC 60794-1-2 for general requirements and definitions, as well as for a reference guide
to test methods of all types.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
IEC 60794-1-23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable
test procedures – Cable element test methods
IEC 60811-501, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 501: Mechanical tests – Tests for determining the mechanical properties of insulating and
sheathing compounds
IEC 61196-1-101, Coaxial communication cables – Part 1-101: Electrical test methods – Test
for conductor d.c. resistance of cable
IEC 61196-1-102, Coaxial communication cables – Part 1-102: Electrical test methods – Test
for insulation resistance of cable dielectric
IEC 61196-1-105, Coaxial communication cables – Part 1-105: Electrical test methods – Test
for withstand voltage of cable dielectric

– 6 – IEC 60794-1-219:2021 © IEC 2021
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Method F19 – Material compatibility test
4.1 Object
The object of this test is to determine the components’ compatibility with polymeric tube/cable
core filling material(s) and/or water-blocking materials that are in direct contact with the
identified components within the cable structure. This test applies to all water-blocked cables.
Typical water-blocking materials include, but are not limited to, filling compounds, absorbent
powders, and flooding compounds.
4.2 Sample
4.2.1 General
Material compatibility can be tested using either the completed cable or individual components.
The choice of the method will depend on material availability and the final intent of the test
program.
4.2.2 Completed cable samples
Cable specimens of sufficient length to perform applicable tests shall be taken from each test
cable sample (a typical length is 3 m).The cable ends shall be capped to prevent the migration
of water-blocking material out of the cable. The minimum specimen coil diameter shall be the
larger one of 500 mm and the minimum cable bend diameter.
4.2.3 Individual components samples
4.2.3.1 General
The sample of individual components shall consist of a container of sufficient size to contain
the component specimens, the specimens to be tested, and an amount of filling or flooding
compound (as appropriate) to completely cover the specimens in the container or, in the case
of the sheath, to coat the specimens. The preparation of the samples includes the steps of
placing specimens in the container and pouring the filling or flooding compound over those
specimens. Whether to use the filling or flooding compound depends on what material is
adjacent to the component to be tested in the actual cable. A filling or flooding compound can
also include an activated dry water-blocking material. The exact test details for the compatibility
between dry water-blocking material containing absorbent powders and other cable
components are still under consideration.
4.2.3.2 Fibre and buffered fibre
A fibre, semi-tight buffered fibre or tight buffered fibre of sufficient length to perform the coating
strip force test in accordance with IEC 60794-1-23, methods G10A and G10C, shall be used in
this test. The specimen shall coil and fit easily into a container. The coil diameter should be
75 mm minimum. Cover the fibre specimens with the filling compound.

4.2.3.3 Optical fibre ribbon
An optical fibre ribbon of sufficient length suitable to perform the ribbon stripping test in
accordance with IEC 60794-1-23, method G10B, shall be used. The specimen shall coil and fit
easily into a container. The coil diameter should be 75 mm minimum. Cover the optical fibre
ribbon specimens with the filling compound.
4.2.3.4 Polymeric tube
Step 1 – Cut a minimum of five polymeric tube specimens of suitable length with the filling
material inside. The ends shall be capped to prevent the migration of the filling material out of
the specimens. If the specimens need to be coiled, the minimum coil diameter should be the
larger one of 300 mm and 50 times tube diameter.
Step 2 – Cut a minimum of five polymeric tube specimens of suitable length with the filling
material inside from the same batch as in step 1. The ends shall be capped to prevent the
migration of the filling material out of the specimens. Fit the specimens into a suitable container.
If the specimens need to be coiled, the minimum coil diameter should be the larger one of
300 mm and 50 times tube diameter. Cover the polymeric tube specimens with the flooding
compound.
Perform only Step 1 of the test, if polymeric tube is exposed only to the filling compound and
the flooding compound is not used in cable construction. It is allowed to perform only Step 2 of
the test in the case that polymeric tube is exposed to both filling compound and flooding
compound. If the test fails, performing Step 1 may be useful to determine which parts of the
cable are not compatible. If only the filling compound in cable construction has been changed,
just perform Step 1 and if only the flooding compound in cable construction has been changed,
just perform Step 2.
4.2.3.5 Sheath
Perform tests on specimens of sheath material prepared from the granular or pelletized raw
materials on extruded tubes of sheath material using parameters similar to the actual sheath,
or on specimens of actual extruded sheaths removed from cables. Unless otherwise specified,
prepare specimens in accordance with IEC 60811-501. A minimum of five aged and five unaged
(control) specimens shall be used for the test.
The sheath material specimens to be aged shall be prepared for testing by coating these sheath
specimens with the flooding material on only one side. The flooding compound shall be heated
to (100 ± 2) °C in order to produce uniform distribution. Apply a thin layer of the flooding
material using a spatula, or paint the heated and liquified material on with a brush, etc., so the
outer surface is completely covered. Do not soak the specimens in the compound.
4.2.3.6 Composite strength member
Cut a minimum of five strength members (composite rods or yarns, central or peripheral)
specimens of suitable length. Fit the specimens in a suitable container. Cover the composite
strength member specimens with the flooding compound.
4.2.3.7 Coated metal tape
Cut a specimen of coated metal tape (shielding tape, armour tape, screen tape) 150 mm long
for evaluation. If a choice of tape width is possible, select a width narrow enough to fit easily
into a container (beaker, graduated cylinder, etc.). Cover the specimen with the flooding
compound.
– 8 – IEC 60794-1-219:2021 © IEC 2021
4.2.3.8 Conductor unit
A suitable length of conductor unit (coaxial cable, pair/quad cable, current carrying conductor
and so on) shall coil and fit easily into a container. Cover the conductor unit specimen with the
flooding compound.
4.3 Ageing procedure
Completed cable and sheath samples should be aged at a temperature of (85 ± 3) °C and a
noncondensing relative humidity of (85 ± 5) % for a period of 30 days, or exposed to the
conditions and during the time specified in the detailed specification.
For individual components encapsulated in or treated with the filling or flooding material, the
samples mentioned in 4.2.3.1, except the sheath, should be aged at a temperature of (85 ± 3) °C
and uncontrolled humidity for a period of 30 days, or exposed to the conditions and during the
time specified in the detailed specification.
For individual components along with dry water-blocking material containing absorbent powders,
the samples should be aged at a temperature of (85 ± 3) °C and a noncondensing relative
humidity of (85 ± 5) % for a period of 30 days, or exposed to the conditions and during the time
specified in the detailed specification.
After conditioning, allow the sample to cool to room ambient conditions for about 2 h. The
components in contact with the water blocking material shall be removed from the cable or from
the container. Allow as much of the compound as possible to drain from the sample. Except for
the metal tape (avoid wiping the specimen), clean the samples carefully (typically using a paper
towel or a clean dry cloth). Do not expose the coated metal tape, optical fibre and buffered fibre,
and optical fibre ribbon to solvents to remove the filling or flooding material.
4.4 Applicable tests
4.4.1 General
After ageing, tests shall be selected from Table 1, in accordance with the sample type or
customer's requirements.
NOTE If hydrogen is of concern, IEC TR 62690 is considered.

Table 1 – Tests applicable for material compatibility evaluation
Component Fibre/Buffered Optical fibre Polymeric tube Sheath Composite Coated metal tape Conductor unit
fibre ribbon strength member
Tests on With tube filling With tube filling With tube filling With flooding With flooding With flooding With flooding
individual (inside) and
components flooding (outside)

Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection
(stability) (delamination)
Coloured fibre Optical fibre ribbon Polymeric tube kink Tensile strength DC resistance
wiping strippability and elongation

Fibre strippability Polymeric tube Insulation
bend resistance
Withstand voltage
of dielectric
Visual inspection Visual inspection
Tests on cable Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection
(stability) (delamination)
Coloured fibre Optical fibre ribbon Polymeric tube kink Tensile strength DC resistance
wiping strippability and elongation

Fibre strippability Polymeric tube Insulation
bend resistance
Withstand voltage
of dielectric
– 10 – IEC 60794-1-219:2021 © IEC 2021
4.4.2 Visual inspection
Visual inspection shall be carried out using normal or normal corrected vision. Inspection for
splitting and cracking shall be carried out using a 5X magnification. The requirement of visual
inspection shall be given in the detailed specification.
Examine the fibre or buffered fibre to see whether the fibre coatings exhibit cracking, splitting,
or delamination. For coloured fibres, check the specimen surface to see whether the colour is
identifiable and whether the colour transfers to the water-blocking compound.
Examine the optical fibre ribbon to see whether it exhibits delamination or fibre separation.
Examine the polymeric tube surface to see whether it exhibits any cracking or splitting. For
coloured tubes, check the specimen surface to see whether the colour is identifiable and
whether the colour transfers to the water-blocking compound.
Examine the specimens of sheath material to see whether they exhibit swelling/distortion.
Examine the specimens of composite strength members to see if there is separation,
delamination or loss of physical integrity.
Examine the specimen of coated metal tape to see whether it exhibits delamination.
Examine the specimen of conductor unit to see whether insulations exhibit any cracking or
splitting, whether the colour of insulations is identifiable and whether the colour transfers to the
water-blocking compound.
4.4.3 Physical testing
4.4.3.1 Coloured fibre wiping test
After ageing, the wiping test should be used to determine the durability of the fibre colour.
Alternative test methods may be agreed between the customer and the supplier. See Figure 1.
a) Wipe solvent: industrial alcohol.
b) Load: 5 N applied over a length of 100 mm (0,5 N/cm), or as specified by the detailed
specification.
c) Fibre length under test: 200 mm or as specified by the detailed specification.
d) Number of wipes: 3 cycles to 10 cycles.
e) Wiping tool: alcohol swabs.
f) Wiping frequency: 10 wipes/min to 60 wipes/min.
NOTE One cycle contains two wipes. If the specimen contains ring marking, the marking will be in the sample length
subjected to the wipes. The pad is kept wet.
The load is applied by a mechanical machine. Manual testing should follow the detailed
specification.
The requirements shall be given in the detailed specification (for example, no colour shall
transfer to the alcohol swabs).

Figure 1 – Typical test set-up for coloured fibre wiping test
4.4.3.2 Fibre and buffered fibre strippability
IEC 60794-1-23, method G10, should be used for measuring the strip force needed to remove
the optical fibres’ coating or coating together with the buffer.
For fibre, IEC 60794-1-23, method G10A, is applied. The force required to strip (30 ± 3) mm of
coating shall comply with the values given in the detailed specification.
For tight buffered fibres, IEC 60794-1-23, method G10C; is applied. The force and the length
required to strip the coating and buffer material, in a single operation, shall comply with the
values given in the detailed specification.
For semi-tight buffered fibres, IEC 60794-1-23, method G10C, is applied. The buffer shall be
removed in a single operation, leaving the fibre coating intact. The required force and length
for the buffer removal shall comply with the values given in the detailed specification.
4.4.3.3 Optical fibre ribbon strippability
After ageing, IEC 60794-1-23, method G10B, should be used to evaluate the strippability of the
optical fibre ribbon matrix and the fibres’ coatings from the aged optical fibre ribbons without
any fibre breakage. Any coating residue shall be easily removable by using isopropyl alcohol
wipes.
4.4.3.4 Polymeric tube kink test
The aged polymeric tubes shall be tested in accordance with IEC 60794-1-23, method G7. Use
a minimum of five aged specimens for the test.
No kink shall occur after the polymeric tube kink test.
4.4.3.5 Polymeric tube bend test
Use IEC 60794-1-23, method G1, as a guide. Select a mandrel having a diameter that is the
larger one of 75 mm and 20 times the tube diameter.
Perform the test sequence 3 times, each time within 30 s,. Wrap the specimen of aged polymeric
tubes around the mandrel, unwrap it and straighten.
Examine for evidence of cracking or splitting.
4.4.3.6 Sheath tensile strength and elongation test
Prepare samples and test specimens as described in IEC 60811-501. Use a minimum of five
aged and five unaged (control) specimens for the test.

– 12 – IEC 60794-1-219:2021 © IEC 2021
After ageing, test the tensile strength and the elongation of the test specimens in the same
manner as for the control specimens.
A minimum of 75 % of its unaged tensile strength and elongation values shall be retained.
4.4.3.7 Electrical tests on conductor unit
The electrical test items on the conductor unit (coaxial cable, pair/quad cable, current carrying
conductor and so on) shall be specified in the detailed specification according to the unit type,
application and customer's requirements. Usually, basic test items such as DC resistance,
insulation resistance, and withstand voltage of dielectric can be performed.
DC resistance shall be tested in accordance with IEC 61196-1-101.
Insulation resistance shall be tested in accordance with IEC 61196-1-102.
Withstand voltage of dielectric shall be tested in accordance with IEC 61196-1-105.
The requirements of each item shall be specified in the detailed specification.
4.5 Details to be specified
The detailed specification shall include the following:
a) detailed requirements of visual inspection;
b) requirement of coloured fibre wiping test;
c) strip force requirement of fibre or buffered fibre;
d) electrical test items of conductor unit and requirements;
e) any
...