IEC 61935-2-24:2015

IEC 61935-2-24 ®
Edition 1.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Generic cabling systems – Specification for the testing of balanced
communication cabling in accordance with ISO/IEC 11801 –
Part 2-24: Cord and work area cord category 7 – Blank detail specification
A
Systèmes de câblage générique – Spécification relative aux essais de câblages
de télécommunications symétriques selon l’ISO/IEC 11801 –
Partie 2-24: Cordons et cordons de zone de travail de catégorie 7 –
A
Spécification particulière cadre

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IEC 61935-2-24 ®
Edition 1.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Generic cabling systems – Specification for the testing of balanced

communication cabling in accordance with ISO/IEC 11801 –

Part 2-24: Cord and work area cord category 7 – Blank detail specification

A
Systèmes de câblage générique – Spécification relative aux essais de câblages

de télécommunications symétriques selon l’ISO/IEC 11801 –

Partie 2-24: Cordons et cordons de zone de travail de catégorie 7 –
A
Spécification particulière cadre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.10 ISBN 978-2-8322-2817-3

– 2 – IEC 61935-2-24:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Guidance for preparation of detail specifications. 6
4 Blank detail specification for cords and work area cords category 7 . 8
A
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GENERIC CABLING SYSTEMS –
SPECIFICATION FOR THE TESTING OF BALANCED
COMMUNICATION CABLING IN ACCORDANCE WITH ISO/IEC 11801 –

Part 2-24: Cord and work area cord category 7 –
A
Blank detail specification
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
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
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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.
International Standard IEC 61935-2-24 has been prepared by IEC technical committee 46:
Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and
accessories.
The text of this standard is based on the following documents:
FDIS Report on voting
46/555/FDIS 46/561/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – IEC 61935-2-24:2015 © IEC 2015
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61935 series, published under the general title Generic cabling
systems – Specification for the testing of balanced communication cabling in accordance with
ISO/IEC 11801, can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
GENERIC CABLING SYSTEMS –
SPECIFICATION FOR THE TESTING OF BALANCED
COMMUNICATION CABLING IN ACCORDANCE WITH ISO/IEC 11801 –

Part 2-24: Cord and work area cord category 7 –
A
Blank detail specification
1 Scope
This part of IEC 61935, which is a blank detail specification, describes cords and work area
cords category 7 , as defined in ISO/IEC 11801 series.
A
According to the above cabling specifications these cords are Category 7 compliant for
A
which the requirements are given in ISO /IEC 11801 series.
This specification should be used in conjunction with IEC 61935-2, IEC 61156-1, IEC 61156-6
and IEC 60603-7-71. The blank detail specification determines the layout and style for detail
specifications describing cords with transmission characteristics up to 1 000 MHz for digital
communications. Detail specifications, based on the blank detail specification, may be
prepared by a national organization, a manufacturer, or a user.
Test configuration applicable to cords is detailed in IEC 61935-2.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60603-7-71, Connectors for electronic equipment – Part 7-71: Detail specification for 8-
way, shielded, free and fixed connectors, for data transmissions with frequencies up to
1 000 MHz
IEC 60794-1-22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable
test procedures – Environmental tests methods
IEC 61156-1:2007, Multicore and symmetrical pair/quad cables for digital communications –
Part 1: Generic specification
IEC 61156-5, Multicore and symmetrical pair/quad cables for digital communications – Part 5:
Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz - Horizontal
floor wiring – Sectional specification (disponible en anglais seulement)
IEC 61156-6:2010, Multicore and symmetrical pair/quad cables for digital communications –
Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1000 MHz –
Work area wiring – Sectional specification
IEC 61156-6:2010/AMD1:2012
IEC 61935-2:2010, Specification for the testing of balanced and coaxial information
technology cabling – Part 2: Cords as specified in ISO/IEC 11801 and related standards

– 6 – IEC 61935-2-24:2015 © IEC 2015
IEC 62012-1:2002, Multicore and symmetrical pair/quad cables for digital communications to
be used in harsh environment – Part 1: Generic specification
ISO/IEC 11801, Information technology – Generic cabling for customer premises
ISO/IEC 24702, Information technology – Generic cabling – Industrial premises
3 Guidance for preparation of detail specifications
It is necessary to keep the transmission characteristics indicated in the relevant sectional
specification for the referenced category number, i.e. 7 and the characteristic impedance.
A
The detail specification shall be written in accordance with the layout of the blank detail
specification, which forms part of this standard.
When a characteristic does not apply, then na (for not applicable) should be entered in the
appropriate space.
When a characteristic applies but a specific value is not considered necessary, then ns (for
not specified) should be entered in the appropriate space. When ns is used, the appropriate
requirement in the sectional specification should apply.
The numbers shown in brackets in this and the following pages correspond to the following
items of required information, which should be entered in the spaces provided.
[1] Name and address of the organization that has prepared the document.
[2] IEC document number, issue number and date of issue.
[3] Address of the organization from which the document is available.
[4] Related documents.
[5] Any other reference to the cable, national reference, trade name, etc.
[6] A complete description of the cord which shall include
a) type and number of elements;
b) nominal impedance;
c) screening;
d) application;
e) specific category of cord, cable and connectors;
f) other distinguishing performance characteristics.
EXEMPLE 4-pair, shielded twisted pair cable for use in work area wiring, having a nominal impedance of
100 Ω, and meeting the transmission requirements of category 7 and the coupling attenuation
A
requirements of type I.
[7] Details of the cable material and construction.
[8] Special requirements for bending radius or operating temperatures.
[9] List of cable characteristics. They are separated into electrical, transmission,
mechanical and environmental characteristics.
The recommended environmental severities are derived from the MICE table requirements of
ISO/IEC 24702. These recommendations were made to better reflect the cable behaviour.
It should be noted that ingress requirements using particles is not applicable to a cable.
The temperature requirements are addressed in [8]. Rapid change of temperature is irrelevant
for cables.
Electromagnetic requirements coming from the MICE table of ISO/IEC 24702 have been dealt
with by using the requirements that are given for transfer impedance, screening attenuation
and coupling attenuation. ESD requirements are considered non-applicable.
[10] Appropriate subclause references in the generic specification IEC 61156-1/IEC 61935-2.
[11] Appropriate subclause references in the sectional specification IEC 61156-6/
IEC 61935-2.
[12] Requirements applicable to this cable. The values shall meet the requirements of
sectional specification IEC 61156-6 for category 7 .
A
For those limits that are not related to the cable category and for which a choice is proposed,
they have to be chosen to meet the related MICE table requirements.
[13] Comments – Relevant remarks.

– 8 – IEC 61935-2-24:2015 © IEC 2015
4 Blank detail specification for cords and work area cords category 7
A
[1] Prepared by: [2] Document:
Issue:
Date:
[3] Available from: [4] Sectional specification for the testing of cords:
IEC 61935-2
Blank detail specification: IEC 61935-2-24
[5] Additional references: ISO/IEC 11801
[6] Cord description:
a) Specific category of cord, cable and connectors
b) Nominal impedance
c) Connector type
d) Cable
e) Conductors material
f) Screening
g) Housing
h) MICE
[7] Cable assembly construction:

Housing
IEC
IEC 61935-2: IEC 61156-1: IEC 61156-6:
2010 § 4.1 2007 2010
5.2.6
Sheath
Material
b
Nominal thickness
5.2.6
Colour
Maximum overall
Diameter
5.2.7
Marking
5.2.8 Packaging
IEC 60603-7-71
Visual inspection IEC 61935-
2:2010 § 5.1
b
It is assumed that a thickness of 0,5 mm is sufficient for spark testing up to 3 kV, thickness larger than
0,8 mm is assumed to be sufficient for spark testing up to 5 kV.
[8]
Minimum bending radius for static bending:  mm
Minimum bending radius for dynamic bending: mm
Temperature range for installation :  °C
Operating temperature range under static conditions: –10 °C to +60 °C (C1), –25 °C to +70 °C (C2), –40 °C to
c
+70 °C (C3)
[9] [10] [11] [12] [13]
Characteristics IEC 61156- IEC 61156- Recommended Comments
1:2007 6:2010 severities/
Subclause Subclause
Requirements
Electrical characteristics 6.2 6.2
DC loop resistance 6.2.1 6.2.1 Assumed to be met by
design
Resistance unbalance 6.2.2 6.2.2 Assumed to be met by
design
Wire map IEC 61935-2:
2010 §5.2
Transmission characteristics
a
Propagation delay IEC 61935-2: Assumed to be met by
–
2010 §5.3 design
a
Differential phase delay (skew) IEC 61935-2: Assumed to be met by
–
2010 §5.4 design
Insertion loss IEC 61935-2: ≤ … dB
2010 §5.5
Near-end crosstalk (pair to pair) 6.3.5 IEC 61935-2:
≥ … dB
2010 §5.7
Return loss IEC 61935-
≥ … dB
2:2010 §5.6
TCL 6.3.4 Under consideration
PS exogenous near end crosstalk 6.3.7
≥ … dB
PS exogenous far end crosstalk 6.3.8 ≥ … dB
Transfer impedance 6.2.7 6.2.7 na Grade 2 Grade 1
b
IEC 61935-2: 6.2.8 Type I
Coupling attenuation
2010 §6.8
a
Not specified in IEC 61156-1.
b
Type Ib per the IEC 61156-5 is also recognized.

– 10 – IEC 61935-2-24:2015 © IEC 2015
Mechanical and dimensional
characteristics
Tensile performance of the cord IEC 61935-2: ≥ …N
2010 §7.2
Flexure IEC 61935-2:
2010 §7.3
Bending IE
...