SIST IEC 62930:2019
(Main)Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC (IEC 62930:2017)
Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC (IEC 62930:2017)
This document applies to single-core cross-linked insulated power cables with cross-linked
sheath. These cables are for use at the direct current (DC) side of photovoltaic systems, with
a rated DC voltage up to 1,5 kV between conductors and between conductor and earth. This
document includes halogen free low smoke cables and cables that can contain halogens.
The cables are suitable to be used with Class II equipment as defined in IEC 61140.
The cables are designed to operate at a normal continuous maximum conductor temperature
of 90 °C. The permissible period of use at a maximum conductor temperature of 120 °C is
limited to 20 000 h.
NOTE The expected period of use under normal usage conditions as specified in this document is at least
25 years.
Električni kabli za fotonapetostne sisteme z enosmerno (DC) napetostjo 1,5 kV (IEC 62930:2017)
Ta dokument se uporablja za enožilne zamrežene izolirane napajalne kable z zamreženo oblogo. Ti kabli se uporabljajo na enosmerni (DC) strani fotonapetostnih sistemov z nazivno enosmerno napetostjo do 1,5 kV med vodniki ter med vodnikom in ozemljitvijo. Ta dokument vključuje kable z majhno gostoto dima brez halogenov in kable, ki lahko vsebujejo halogene. Kabli so primerni za uporabo z opremo razreda II, kot je opredeljeno v standardu IEC 61140.
Kabli so zasnovani za delovanje pri običajni enakomerni najvišji temperaturi vodnika 90 °C. Dopustno obdobje uporabe pri najvišji temperaturi vodnika 120 °C je omejeno na 20.000 h.
OPOMBA: Pričakovano obdobje uporabe v običajnih pogojih uporabe, kot je določeno v tem dokumentu, znaša 25 let.
General Information
Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST IEC 62930:2019
01-marec-2019
(OHNWULþQLNDEOL]DIRWRQDSHWRVWQHVLVWHPH]HQRVPHUQR '& QDSHWRVWMRN9
,(&
Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC (IEC
62930:2017)
Ta slovenski standard je istoveten z: IEC 62930 Ed. 1.0
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
29.060.20 Kabli Cables
SIST IEC 62930:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST IEC 62930:2019
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SIST IEC 62930:2019
IEC 62930
®
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20; 27.160 ISBN 978-2-8322-5145-4
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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– 2 – IEC 62930:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Rated voltage . 9
5 Requirements for the construction of cables . 9
5.1 Conductors . 9
5.1.1 Material . 9
5.1.2 Construction . 10
5.1.3 Separator between conductor and insulation . 10
5.1.4 Check of construction . 10
5.2 Insulation . 10
5.2.1 Material . 10
5.2.2 Application to the conductor . 10
5.2.3 Thickness . 10
5.3 Sheath . 11
5.3.1 Material . 11
5.3.2 Application . 11
5.3.3 Thickness . 11
5.3.4 Colour . 11
5.4 Multi-core cables and additional elements . 11
6 Marking . 11
6.1 General . 11
6.2 Indication of origin . 11
6.3 Code marking . 12
6.4 Additional marking . 12
6.5 Nominal cross-sectional area of conductor . 12
6.6 Continuity of marking . 12
6.7 Additional requirements . 12
6.7.1 Durability . 12
6.7.2 Legibility . 12
7 Requirements for completed cables . 12
7.1 General . 12
7.2 Electrical tests - check for absence of faults on the insulation or on the
complete cable . 13
7.3 Non electrical tests - overall diameters and ovality . 13
Annex A (normative) Guide to use . 19
A.1 Use of cables for PV systems . 19
A.2 Groups . 21
A.3 Short-circuit-temperature . 21
Annex B (normative) Requirements for insulation and sheathing materials . 22
Annex C (normative) Cold impact test . 24
Annex D (normative) Dynamic penetration test . 25
Annex E (normative) Weathering/UV resistance test . 26
Bibliography . 27
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Figure 1 – Example of marking as used on the outer sheath of the cable . 12
Figure D.1 – Arrangement for dynamic penetration test. 25
Table 1 – Dimensional and insulation resistance values for class 5 conductor cables . 13
Table 2 – Dimensional and insulation resistance values for class 2 conductor cables . 14
Table 3 – Tests for cables to IEC 62930 . 15
Table A.1 – Intended use of cables for PV systems (environmental conditions) . 20
Table A.2 – Recommended use of cables for PV systems . 20
Table A.3 – Current carrying capacity of PV cables . 21
Table A.4 – Current rating conversion factors for different ambient temperatures . 21
Table B.1 – Requirements for insulation and sheathing materials . 22
Table C.1 – Parameters for cold impact test . 24
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC CABLES FOR PHOTOVOLTAIC SYSTEMS
WITH A VOLTAGE RATING OF 1,5 kV DC
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, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 62930 has been prepared by IEC technical committee 20: Electric
cables.
The text of this International Standard is based on the following documents:
FDIS Report on voting
20/1764/FDIS 20/1777/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
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• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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INTRODUCTION
This document specifies cables for use in photovoltaic (PV) systems for installation at the
direct current (DC) side. These cables are suitable for permanent outdoor long-term use
under variable demanding climate conditions. Relatively stringent requirements are set for
these products in line with the expected usage conditions.
During the writing of this document, the work of IEC TC 64 (Electrical installations and
protection against electric shock) and IEC TC 82 (Solar photovoltaic energy systems) on the
design and installation of PV systems has been taken into account.
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ELECTRIC CABLES FOR PHOTOVOLTAIC SYSTEMS
WITH A VOLTAGE RATING OF 1,5 kV DC
1 Scope
This document applies to single-core cross-linked insulated power cables with cross-linked
sheath. These cables are for use at the direct current (DC) side of photovoltaic systems, with
a rated DC voltage up to 1,5 kV between conductors and between conductor and earth. This
document includes halogen free low smoke cables and cables that can contain halogens.
The cables are suitable to be used with Class II equipment as defined in IEC 61140.
The cables are designed to operate at a normal continuous maximum conductor temperature
of 90 °C. The permissible period of use at a maximum conductor temperature of 120 °C is
limited to 20 000 h.
NOTE The expected period of use under normal usage conditions as specified in this document is at least
25 years.
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 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60216-1, Electrical insulating materials – Thermal endurance properties – Part 1: Ageing
procedures and evaluation of test results
IEC 60216-2, Electrical insulating materials – Thermal endurance properties – Part 2:
Determination of thermal endurance properties of electrical insulating materials – Choice of
test criteria
IEC 60227-2:1997, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 2: Test methods
IEC 60245-2:1994, Rubber insulated cables – Rated voltages up to and including 450/750 V –
Part 2: Test methods
IEC 60228:2004, Conductors of insulated cables
IEC 60332-1-2:2004, Tests on electric and optical fibre cables under fire conditions –
Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure
for 1 kW pre-mixed flame
IEC 60332-1-2:2004/AMD1:2015
IEC 60364-5-52, Low-voltage electrical installations – Part 5-52: Selection and erection of
electrical equipment – Wiring systems
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IEC 60719, Calculation of the lower and upper limits for the average outer dimensions of
cables with circular copper conductors and of rated voltages up to and including 450/750 V
IEC 60811-401:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in an air oven
IEC 60811-403, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 403: Miscellaneous tests – Ozone resistance test on cross-linked compounds
IEC 60811-404, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 404: Miscellaneous tests – Mineral oil immersion tests for sheaths
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 60811-503, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 503: Mechanical tests – Shrinkage test for sheaths
IEC 60811-504, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 504: Mechanical tests – Bending tests at low temperature for insulation and sheaths
IEC 60811-505, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 505: Mechanical tests – Elongation at low temperature for insulations and sheaths
IEC 60811-506, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 506: Mechanical tests – Impact test at low temperature for insulations and sheaths
IEC 60811-507, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 507: Mechanical tests – Hot set test for cross-linked materials
IEC 61034-2, Measurement of smoke density of cables burning under defined conditions –
Part 2: Test procedure and requirements
IEC 61140, Protection against electric shock – Common aspects for installation and
equipment
IEC 62230, Electric cables – Spark-test method
IEC 62440:2008, Electric cables with a rated voltage not exceeding 450/750 V – Guide to use
IEC 62821-1:2015, Electric cables – Halogen-free, low smoke, thermoplastic insulated and
sheathed cables of rated voltages up to and including 450/750 V – Part 1: General
requirements
IEC 62821-2:2015, Electric cables – Halogen-free, low smoke, thermoplastic insulated and
sheathed cables of rated voltages up to and including 450/750 V – Part 2: Test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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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
3.1
type test
T
tests required to be carried out before supplying a type of cable covered by IEC 62930 on a
general commercial basis, in order to demonstrate satisfactory performance characteristics to
meet the intended application
Note 1 to entry: Type tests are of such a nature that, after they have been made, they need not be repeated
unless changes are made in the cable materials, design or type of manufacturing process which might change the
performance characteristics.
3.2
sample test
S
tests carried out on samples of completed cable, or components taken from a completed
cable adequate to verify that the finished product meets the design specifications
3.3
routine test
R
tests carried out on all production cable lengths to demonstrate their integrity
3.4
halogen free material
material containing no more than a defined impurity level of halogens
4 Rated voltage
The cables specified by this document are in particular designed for use at the direct current
(DC) side of photovoltaic-systems, with a rated DC voltage up to 1,5 kV between conductors
as well as between conductor and earth.
Annex A provides further guidance on voltage ratings.
5 Requirements for the construction of cables
5.1 Conductors
5.1.1 Material
The conductors shall be copper, and in accordance with IEC 60228.
The wires of conductors shall be tin coated. The wires shall be covered with a continuous
layer of tin coating.
There shall be no visible gaps in the continuous layer, when examined with normal or
corrected vision.
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5.1.2 Construction
The class of the conductor shall be Class 5 in accordance with IEC 60228 for cable that is
directly connected to PV modules. Class 2 conductors are allowed for cables intended for
fixed installation and not directly connected to the PV modules.
The nominal cross-sectional areas for each conductor class are given in Table 1.
5.1.3 Separator between conductor and insulation
A non-metallic separator may be applied between the conductor and the insulation. If a
non-metallic separator is applied in a halogen free low smoke cable, it shall be halogen free.
5.1.4 Check of construction
Compliance with the requirements of 5.1.1, 5.1.2 and 5.1.3, including the requirements of
IEC 60228, shall be checked by inspection and by measurement.
5.2 Insulation
5.2.1 Material
The insulation material shall be a cross-linked compound and fulfil the requirements as
specified in Table B.1 in Annex B.
5.2.2 Application to the conductor
The insulation shall be applied by extrusion, such that it fits closely on the conductor, but it
shall be possible to remove it without damage to the insulation itself, to the conductor or to
the tin coating. It is permitted to apply the insulation in a single layer, or in a number of
non-separable layers. Where more than one layer is used, all testing shall be carried out on
the complete insulation as though it were a single layer.
NOTE Insulation applied in more than one layer does not conform to the definition of “double insulation” given, for
instance, in IEC 61140.
Compliance shall be checked by inspection and by manual test.
5.2.3 Thickness
The average of the measured values, rounded to 0,1 mm, shall be not less than the specified
value for each size shown in Table 1.
The smallest value measured shall not fall below 90 % of the specified value by more than
0,1 mm, i.e.:
t > 0,9t – 0,1
m s
where:
t is the minimum insulation thickness at any point in millimetres;
m
t is the specified insulation thickness, in millimetres.
s
Compliance shall be checked using the test given in 1.9 of IEC 60245-2:1994.
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5.3 Sheath
5.3.1 Material
The sheath material shall be a cross-linked compound and fulfil the requirements as specified
in Table B.1 in Annex B.
5.3.2 Application
The sheath shall be applied homogeneously by extrusion. It is permitted to apply the sheath in
a single layer, or in a number of non-separable layers. Where more than one layer is used, all
testing shall be carried out on the complete sheathing as though it were a single layer.
The application of the sheath shall give the finished cable a practically circular shape.
A non-metallic separator may be applied under the sheath. If a non-metallic separator is
applied in a halogen free low smoke cable, it shall be halogen free.
5.3.3 Thickness
The average of the measured values, rounded to 0,1 mm, shall be not less than the specified
value for each size shown in Table 1.
The smallest value measured shall not fall below 85 % of the specified value by more than
0,1 mm, i.e.:
t > 0,85t – 0,1
m s
where:
t is the minimum sheath thickness at any point in millimetres;
m
t is the specified sheath thickness, in millimetres.
s
Compliance shall be checked using the test given in 1.10 of IEC 60245-2:1994.
5.3.4 Colour
The sheath shall be coloured black, unless otherwise agreed between manufacturer and
customer. The colour shall be throughout the whole of the sheath.
5.4 Multi-core cables and additional elements
Multi-core constructions are allowed provided that all cores are individually sheathed and
comply with all requirements set in this document.
Any additional element shall comply with all material requirements set in this document.
6 Marking
6.1 General
The sheath of the cable shall be marked by printing, embossing or indenting.
6.2 Indication of origin
Cables shall be provided with an identification of origin consisting of the continuous marking
of the manufacturer's name or trademark, or (if legally protected) identification number.
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6.3 Code marking
The cables with halogen free insulation and sheath shall be marked 62930 IEC 131 for cables
with conductor Class 5 and 62930 IEC 132 for cables with conductor Class 2.
Cables with insulation and/or sheath that may contain halogens shall be marked
62930 IEC 133 for cables with Class 5 and 62930 IEC 134 for cables with conductor Class 2.
6.4 Additional marking
Halogen free low smoke cables shall be marked “HALOGEN FREE LOW SMOKE”.
6.5 Nominal cross-sectional area of conductor
2
Cables shall be marked with the nominal cross-sectional area, for example ‘2,5 mm ’.
6.6 Continuity of marking
Each specified marking shall be regarded as continuous if the distance between the end of
the mark and the beginning of the next identical mark does not exceed 550 mm.
NOTE 1 A 'specified marking' is any mandatory marking covered by this document.
NOTE 2 Other marking, such as that required under recognized voluntary third party approval schemes, can also
follow the requirements of 6.6.
Figure 1 shows an example of the marking as used on the outer sheath of the cable.
Dimensions in millimetres
≤ 550
≤ 550
IEC
Figure 1 – Example of marking as used on the outer sheath of the cable
6.7 Additional requirements
6.7.1 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked by the
test given in 1.8 of IEC 60245-2:1994.
6.7.2 Legibility
All markings shall be legible.
7 Requirements for completed cables
7.1 General
The tests to be carried out on cables specified in this document shall be as scheduled in
Table 3, which refers to the relevant clauses of the standard specifying the requirements and
test methods as well as the category of each test which applies, i.e. type test (T); sample test
(S) or routine test (R) (as defined in Clause 3).
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Requirements for tests not previously specified are as given in 7.2 to 7.3.
7.2 Electrical tests - check for absence of faults on the insulation or on the complete
cable
The cable shall be tested during manufacturing for faults in accordance with IEC 62230. In
case checking of the insulation only is impossible, testing shall be performed on the complete
cable.
No fault shall be detected.
7.3 Non electrical tests - overall diameters and ovality
Informative values on maximum overall diameters of the cables are given in Table 1 and
Table 2. Ovality of the cables shall be limited: the difference between any two values of the
overall diameter of a sheathed cable at the same cross-section shall not exceed 15 % of the
upper limit given for the overall diameter in Table 1 and Table 2.
Table 1 – Dimensional and insulation resistance values
for class 5 conductor cables
Nominal cross Thickness of Thickness of Mean overall diameter Minimum Minimum
a
sectional area insulation sheath Upper value insulation insulation
of conductor resistance at resistance at
Specified Specified Class 5
20 ºC 90 °C
value value
2
mm mm mm mm
MΩ·km MΩ·km
1,5 0,7 0,8 5,4 1 050 1,05
2,5 0,7 0,8 5,9 862 0,862
4 0,7 0,8 6,6 709 0,709
6 0,7 0,8 7,2 610 0,610
10 0,7 0,8 8,3 489 0,489
16 0,7 0,9 9,8 393 0,393
25 0,9 1,0 12,2 395 0,395
35 0,9 1,1 14,0 335 0,335
50 1,0 1,2 16,3 314 0,314
70 1,1 1,2 18,7 291 0,291
95 1,1 1,3 20,8 258 0,258
120 1,2 1,3 23,0 249 0,249
150 1,4 1,4 25,7 260 0,260
185 1,6 1,6 28,7 268 0,268
240 1,7 1,7 32,3 249 0,249
300 1,8 1,8 35,6 237 0,237
400 2,0 2,0 40,6 230 0,230
a
Indicative values, for information only.
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Table 2 – Dimensional and insulation resistance values
for class 2 conductor cables
Nominal cross Thickness of Thickness of Mean overall diameter Minimum Minimum
a
sectional area insulation sheath Upper value insulation insulation
of conductor resistance at resistance at
Specified Specified Class 2
20 °C 90 °C
value value
2
mm mm mm mm
MΩ·km MΩ·km
16 0,7 0,9 9,5 374 0,374
25 0,9 1,0 11,8 384 0,384
35 0,9 1,1 13,2 327 0,327
50 1,0 1,2 15,1 317 0,317
70 1,1 1,2 17,3 291 0,291
95 1,1 1,3 19,6 251 0,251
120 1,2 1,3 21,6 244 0,244
150 1,4 1,4 24,0 254 0,254
185 1,6 1,6 27,0 261 0,261
240 1,7 1,7 30,4 243 0,243
300 1,8 1,8 33,5 231 0,231
400 2,0 2,0 37,7 227 0,227
a
Indicative values, for information only.
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Table 3 – Tests for cables to IEC 62930
Ref No. Test Unit Test method described in Requirements Category
of test
IEC Clause
1 Electrical tests
1.1 Measurement of the 60228:2004 Annex A T, S
resistance of conductor
1.1.1 Values to be obtained max. Ω/km IEC 60228
1.2 Voltage test on completed 60245-2:1994 2.2 T, S
cable with AC or DC
1.2.1 Test conditions:
- minimum length of the m 20
sample
- minimum period of h 1
immersion in water
- temperature of the water °C
...
IEC 62930
®
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC
IEC 62930:2017-12(en)
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IEC 62930
®
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20; 27.160 ISBN 978-2-8322-5145-4
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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– 2 – IEC 62930:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Rated voltage . 9
5 Requirements for the construction of cables . 9
5.1 Conductors . 9
5.1.1 Material . 9
5.1.2 Construction . 10
5.1.3 Separator between conductor and insulation . 10
5.1.4 Check of construction . 10
5.2 Insulation . 10
5.2.1 Material . 10
5.2.2 Application to the conductor . 10
5.2.3 Thickness . 10
5.3 Sheath . 11
5.3.1 Material . 11
5.3.2 Application . 11
5.3.3 Thickness . 11
5.3.4 Colour . 11
5.4 Multi-core cables and additional elements . 11
6 Marking . 11
6.1 General . 11
6.2 Indication of origin . 11
6.3 Code marking . 12
6.4 Additional marking . 12
6.5 Nominal cross-sectional area of conductor . 12
6.6 Continuity of marking . 12
6.7 Additional requirements . 12
6.7.1 Durability . 12
6.7.2 Legibility . 12
7 Requirements for completed cables . 12
7.1 General . 12
7.2 Electrical tests - check for absence of faults on the insulation or on the
complete cable . 13
7.3 Non electrical tests - overall diameters and ovality . 13
Annex A (normative) Guide to use . 19
A.1 Use of cables for PV systems . 19
A.2 Groups . 21
A.3 Short-circuit-temperature . 21
Annex B (normative) Requirements for insulation and sheathing materials . 22
Annex C (normative) Cold impact test . 24
Annex D (normative) Dynamic penetration test . 25
Annex E (normative) Weathering/UV resistance test . 26
Bibliography . 27
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IEC 62930:2017 © IEC 2017 – 3 –
Figure 1 – Example of marking as used on the outer sheath of the cable . 12
Figure D.1 – Arrangement for dynamic penetration test. 25
Table 1 – Dimensional and insulation resistance values for class 5 conductor cables . 13
Table 2 – Dimensional and insulation resistance values for class 2 conductor cables . 14
Table 3 – Tests for cables to IEC 62930 . 15
Table A.1 – Intended use of cables for PV systems (environmental conditions) . 20
Table A.2 – Recommended use of cables for PV systems . 20
Table A.3 – Current carrying capacity of PV cables . 21
Table A.4 – Current rating conversion factors for different ambient temperatures . 21
Table B.1 – Requirements for insulation and sheathing materials . 22
Table C.1 – Parameters for cold impact test . 24
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC CABLES FOR PHOTOVOLTAIC SYSTEMS
WITH A VOLTAGE RATING OF 1,5 kV DC
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, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 62930 has been prepared by IEC technical committee 20: Electric
cables.
The text of this International Standard is based on the following documents:
FDIS Report on voting
20/1764/FDIS 20/1777/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
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IEC 62930:2017 © IEC 2017 – 5 –
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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– 6 – IEC 62930:2017 © IEC 2017
INTRODUCTION
This document specifies cables for use in photovoltaic (PV) systems for installation at the
direct current (DC) side. These cables are suitable for permanent outdoor long-term use
under variable demanding climate conditions. Relatively stringent requirements are set for
these products in line with the expected usage conditions.
During the writing of this document, the work of IEC TC 64 (Electrical installations and
protection against electric shock) and IEC TC 82 (Solar photovoltaic energy systems) on the
design and installation of PV systems has been taken into account.
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IEC 62930:2017 © IEC 2017 – 7 –
ELECTRIC CABLES FOR PHOTOVOLTAIC SYSTEMS
WITH A VOLTAGE RATING OF 1,5 kV DC
1 Scope
This document applies to single-core cross-linked insulated power cables with cross-linked
sheath. These cables are for use at the direct current (DC) side of photovoltaic systems, with
a rated DC voltage up to 1,5 kV between conductors and between conductor and earth. This
document includes halogen free low smoke cables and cables that can contain halogens.
The cables are suitable to be used with Class II equipment as defined in IEC 61140.
The cables are designed to operate at a normal continuous maximum conductor temperature
of 90 °C. The permissible period of use at a maximum conductor temperature of 120 °C is
limited to 20 000 h.
NOTE The expected period of use under normal usage conditions as specified in this document is at least
25 years.
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 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60216-1, Electrical insulating materials – Thermal endurance properties – Part 1: Ageing
procedures and evaluation of test results
IEC 60216-2, Electrical insulating materials – Thermal endurance properties – Part 2:
Determination of thermal endurance properties of electrical insulating materials – Choice of
test criteria
IEC 60227-2:1997, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 2: Test methods
IEC 60245-2:1994, Rubber insulated cables – Rated voltages up to and including 450/750 V –
Part 2: Test methods
IEC 60228:2004, Conductors of insulated cables
IEC 60332-1-2:2004, Tests on electric and optical fibre cables under fire conditions –
Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure
for 1 kW pre-mixed flame
IEC 60332-1-2:2004/AMD1:2015
IEC 60364-5-52, Low-voltage electrical installations – Part 5-52: Selection and erection of
electrical equipment – Wiring systems
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– 8 – IEC 62930:2017 © IEC 2017
IEC 60719, Calculation of the lower and upper limits for the average outer dimensions of
cables with circular copper conductors and of rated voltages up to and including 450/750 V
IEC 60811-401:2012, Electric and optical fibre cables – Test methods for non-metallic
materials – Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in an air oven
IEC 60811-403, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 403: Miscellaneous tests – Ozone resistance test on cross-linked compounds
IEC 60811-404, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 404: Miscellaneous tests – Mineral oil immersion tests for sheaths
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 60811-503, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 503: Mechanical tests – Shrinkage test for sheaths
IEC 60811-504, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 504: Mechanical tests – Bending tests at low temperature for insulation and sheaths
IEC 60811-505, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 505: Mechanical tests – Elongation at low temperature for insulations and sheaths
IEC 60811-506, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 506: Mechanical tests – Impact test at low temperature for insulations and sheaths
IEC 60811-507, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 507: Mechanical tests – Hot set test for cross-linked materials
IEC 61034-2, Measurement of smoke density of cables burning under defined conditions –
Part 2: Test procedure and requirements
IEC 61140, Protection against electric shock – Common aspects for installation and
equipment
IEC 62230, Electric cables – Spark-test method
IEC 62440:2008, Electric cables with a rated voltage not exceeding 450/750 V – Guide to use
IEC 62821-1:2015, Electric cables – Halogen-free, low smoke, thermoplastic insulated and
sheathed cables of rated voltages up to and including 450/750 V – Part 1: General
requirements
IEC 62821-2:2015, Electric cables – Halogen-free, low smoke, thermoplastic insulated and
sheathed cables of rated voltages up to and including 450/750 V – Part 2: Test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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IEC 62930:2017 © IEC 2017 – 9 –
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
3.1
type test
T
tests required to be carried out before supplying a type of cable covered by IEC 62930 on a
general commercial basis, in order to demonstrate satisfactory performance characteristics to
meet the intended application
Note 1 to entry: Type tests are of such a nature that, after they have been made, they need not be repeated
unless changes are made in the cable materials, design or type of manufacturing process which might change the
performance characteristics.
3.2
sample test
S
tests carried out on samples of completed cable, or components taken from a completed
cable adequate to verify that the finished product meets the design specifications
3.3
routine test
R
tests carried out on all production cable lengths to demonstrate their integrity
3.4
halogen free material
material containing no more than a defined impurity level of halogens
4 Rated voltage
The cables specified by this document are in particular designed for use at the direct current
(DC) side of photovoltaic-systems, with a rated DC voltage up to 1,5 kV between conductors
as well as between conductor and earth.
Annex A provides further guidance on voltage ratings.
5 Requirements for the construction of cables
5.1 Conductors
5.1.1 Material
The conductors shall be copper, and in accordance with IEC 60228.
The wires of conductors shall be tin coated. The wires shall be covered with a continuous
layer of tin coating.
There shall be no visible gaps in the continuous layer, when examined with normal or
corrected vision.
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5.1.2 Construction
The class of the conductor shall be Class 5 in accordance with IEC 60228 for cable that is
directly connected to PV modules. Class 2 conductors are allowed for cables intended for
fixed installation and not directly connected to the PV modules.
The nominal cross-sectional areas for each conductor class are given in Table 1.
5.1.3 Separator between conductor and insulation
A non-metallic separator may be applied between the conductor and the insulation. If a
non-metallic separator is applied in a halogen free low smoke cable, it shall be halogen free.
5.1.4 Check of construction
Compliance with the requirements of 5.1.1, 5.1.2 and 5.1.3, including the requirements of
IEC 60228, shall be checked by inspection and by measurement.
5.2 Insulation
5.2.1 Material
The insulation material shall be a cross-linked compound and fulfil the requirements as
specified in Table B.1 in Annex B.
5.2.2 Application to the conductor
The insulation shall be applied by extrusion, such that it fits closely on the conductor, but it
shall be possible to remove it without damage to the insulation itself, to the conductor or to
the tin coating. It is permitted to apply the insulation in a single layer, or in a number of
non-separable layers. Where more than one layer is used, all testing shall be carried out on
the complete insulation as though it were a single layer.
NOTE Insulation applied in more than one layer does not conform to the definition of “double insulation” given, for
instance, in IEC 61140.
Compliance shall be checked by inspection and by manual test.
5.2.3 Thickness
The average of the measured values, rounded to 0,1 mm, shall be not less than the specified
value for each size shown in Table 1.
The smallest value measured shall not fall below 90 % of the specified value by more than
0,1 mm, i.e.:
t > 0,9t – 0,1
m s
where:
t is the minimum insulation thickness at any point in millimetres;
m
t is the specified insulation thickness, in millimetres.
s
Compliance shall be checked using the test given in 1.9 of IEC 60245-2:1994.
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IEC 62930:2017 © IEC 2017 – 11 –
5.3 Sheath
5.3.1 Material
The sheath material shall be a cross-linked compound and fulfil the requirements as specified
in Table B.1 in Annex B.
5.3.2 Application
The sheath shall be applied homogeneously by extrusion. It is permitted to apply the sheath in
a single layer, or in a number of non-separable layers. Where more than one layer is used, all
testing shall be carried out on the complete sheathing as though it were a single layer.
The application of the sheath shall give the finished cable a practically circular shape.
A non-metallic separator may be applied under the sheath. If a non-metallic separator is
applied in a halogen free low smoke cable, it shall be halogen free.
5.3.3 Thickness
The average of the measured values, rounded to 0,1 mm, shall be not less than the specified
value for each size shown in Table 1.
The smallest value measured shall not fall below 85 % of the specified value by more than
0,1 mm, i.e.:
t > 0,85t – 0,1
m s
where:
t is the minimum sheath thickness at any point in millimetres;
m
t is the specified sheath thickness, in millimetres.
s
Compliance shall be checked using the test given in 1.10 of IEC 60245-2:1994.
5.3.4 Colour
The sheath shall be coloured black, unless otherwise agreed between manufacturer and
customer. The colour shall be throughout the whole of the sheath.
5.4 Multi-core cables and additional elements
Multi-core constructions are allowed provided that all cores are individually sheathed and
comply with all requirements set in this document.
Any additional element shall comply with all material requirements set in this document.
6 Marking
6.1 General
The sheath of the cable shall be marked by printing, embossing or indenting.
6.2 Indication of origin
Cables shall be provided with an identification of origin consisting of the continuous marking
of the manufacturer's name or trademark, or (if legally protected) identification number.
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6.3 Code marking
The cables with halogen free insulation and sheath shall be marked 62930 IEC 131 for cables
with conductor Class 5 and 62930 IEC 132 for cables with conductor Class 2.
Cables with insulation and/or sheath that may contain halogens shall be marked
62930 IEC 133 for cables with Class 5 and 62930 IEC 134 for cables with conductor Class 2.
6.4 Additional marking
Halogen free low smoke cables shall be marked “HALOGEN FREE LOW SMOKE”.
6.5 Nominal cross-sectional area of conductor
2
Cables shall be marked with the nominal cross-sectional area, for example ‘2,5 mm ’.
6.6 Continuity of marking
Each specified marking shall be regarded as continuous if the distance between the end of
the mark and the beginning of the next identical mark does not exceed 550 mm.
NOTE 1 A 'specified marking' is any mandatory marking covered by this document.
NOTE 2 Other marking, such as that required under recognized voluntary third party approval schemes, can also
follow the requirements of 6.6.
Figure 1 shows an example of the marking as used on the outer sheath of the cable.
Dimensions in millimetres
≤ 550
≤ 550
IEC
Figure 1 – Example of marking as used on the outer sheath of the cable
6.7 Additional requirements
6.7.1 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked by the
test given in 1.8 of IEC 60245-2:1994.
6.7.2 Legibility
All markings shall be legible.
7 Requirements for completed cables
7.1 General
The tests to be carried out on cables specified in this document shall be as scheduled in
Table 3, which refers to the relevant clauses of the standard specifying the requirements and
test methods as well as the category of each test which applies, i.e. type test (T); sample test
(S) or routine test (R) (as defined in Clause 3).
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IEC 62930:2017 © IEC 2017 – 13 –
Requirements for tests not previously specified are as given in 7.2 to 7.3.
7.2 Electrical tests - check for absence of faults on the insulation or on the complete
cable
The cable shall be tested during manufacturing for faults in accordance with IEC 62230. In
case checking of the insulation only is impossible, testing shall be performed on the complete
cable.
No fault shall be detected.
7.3 Non electrical tests - overall diameters and ovality
Informative values on maximum overall diameters of the cables are given in Table 1 and
Table 2. Ovality of the cables shall be limited: the difference between any two values of the
overall diameter of a sheathed cable at the same cross-section shall not exceed 15 % of the
upper limit given for the overall diameter in Table 1 and Table 2.
Table 1 – Dimensional and insulation resistance values
for class 5 conductor cables
Nominal cross Thickness of Thickness of Mean overall diameter Minimum Minimum
a
sectional area insulation sheath Upper value insulation insulation
of conductor resistance at resistance at
Speci
...
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