SIST HD 22.1 S4:2003
(Main)Cables of rated voltages up to and including 450/750 V and having cross-linked insulation - Part 1: General requirements
Cables of rated voltages up to and including 450/750 V and having cross-linked insulation - Part 1: General requirements
Superseded by EN 50525-1:2011
Starkstromleitungen mit vernetzter Isolierhülle für Nennspannungen bis 450/750 V - Teil 1: Allgemeine Anforderungen
Conducteurs et câbles isolés avec des matériaux réticulés de tension assignée au plus égale à 450/750 V - Partie 1: Prescriptions générales
Kabli z naznačenimi vrednostmi do vključno 450/750 V in s prečno povezano izolacijo - 1. del: Splošne zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST HD 22.1 S4:2003
01-februar-2003
1DGRPHãþD
SIST HD 22.1 S3:1998
.DEOL]QD]QDþHQLPLYUHGQRVWPLGRYNOMXþQR9LQVSUHþQRSRYH]DQR
L]RODFLMRGHO 6SORãQH]DKWHYH
Cables of rated voltages up to and including 450/750 V and having cross-linked
insulation - Part 1: General requirements
Starkstromleitungen mit vernetzter Isolierhülle für Nennspannungen bis 450/750 V - Teil
1: Allgemeine Anforderungen
Conducteurs et câbles isolés avec des matériaux réticulés de tension assignée au plus
égale à 450/750 V - Partie 1: Prescriptions générales
Ta slovenski standard je istoveten z: HD 22.1 S4:2002
ICS:
29.060.20 Kabli Cables
SIST HD 22.1 S4:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST HD 22.1 S4:2003
---------------------- Page: 2 ----------------------
SIST HD 22.1 S4:2003
HARMONIZATION DOCUMENT HD 22.1 S4
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT November 2002
ICS 29.060.20 Supersedes HD 22.1 S3:1997
English version
Cables of rated voltages up to and including 450/750 V
and having cross-linked insulation
Part 1: General requirements
Conducteurs et câbles isolés Starkstromleitungen mit vernetzter
avec des matériaux réticulés Isolierhülle mit Nennspannungen
de tension assignée bis 450/750 V
au plus égale à 450/750 V Teil 1: Allgemeine Anforderungen
Partie 1: Prescriptions générales
This Harmonization Document was approved by CENELEC on 2002-09-01. CENELEC members are
bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
implementation of this Harmonization Document on a national level.
Up-to-date lists and bibliographical references concerning such national implementation may be obtained on
application to the Central Secretariat or to any CENELEC member.
This Harmonization Document exists in three official versions (English, French, German).
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 22.1 S4:2002 E
---------------------- Page: 3 ----------------------
SIST HD 22.1 S4:2003
HD 22.1 S4:2002 - 2 -
Foreword
This edition 4 of HD 22.1 has been prepared by the Technical Committee CLC/TC 20, Electric cables.
HD 22 was originally adopted by CENELEC on 9th July 1975.
st
Edition 2 of HD 22 was implemented on 1 January 1984. A third edition of Part 1 was published in
September 1997.
th
This 4 edition provides a full updating, including incorporation of amendments ratified during the
maintenance of Part 3 onwards of HD 22, and introduces other improvements.
HD 22.1 S4 is related to IEC 60245-1:1994, but is not directly equivalent.
HD 22 now has the following parts:
HD 22.1 S4 General requirements
HD 22.2 S3 Test methods
HD 22.3 S3 Heat resistant silicone rubber insulated cables
HD 22.4 S3 Cords and flexible cables
HD 22.5 (Spare)
HD 22.6 S2 Arc welding cables
HD 22.7 S2 Cables with increased heat resistance for internal wiring for a conductor
o
temperature of 110 C
HD 22.8 S2 Polychloroprene or equivalent synthetic elastomer sheathed cable for decorative
chains
HD 22.9 S2 Single core non-sheathed cables for fixed wiring having low emission of smoke
and corrosive gases
HD 22.10 S1 EPR insulated and polyurethane sheathed flexible cable
HD 22.11 S1 EVA cords and flexible cables
HD 22.12 S1 Heat resistant EPR cords and flexible cables
HD 22.13 S1 Single and multicore flexible cables, insulated and sheathed with cross-linked
polymer and having low emission of smoke and corrosive gases
HD 22.14 S2 Cords for applications requiring high flexibility
HD 22.15 S1 Multicore cables insulated and sheathed with heat resistant silicone rubber
HD 22.16 S1 Water resistant polychloroprene or equivalent synthetic elastomer sheathed
cables
In order that this revision of Part 1 of HD 22 does not introduce unnecessary changes to long-
established clause numbers, the normative references (which would otherwise be inserted as clause 2)
are given in annex A.
The draft Harmonization Document was submitted to the Unique Acceptance Procedure and approved
by CENELEC as HD 22.1 S4 on 2002-09-01.
The following dates were fixed:
- latest date by which the existence of the HD
has to be announced at national level (doa) 2003-03-01
- latest date by which the HD has to be implemented
at national level by publication of a harmonized
national standard or by endorsement (dop) 2003-09-01
- latest date by which the national standards conflicting
with the HD have to be withdrawn (dow) 2003-09-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex A is normative and annex B is informative.
_______________
---------------------- Page: 4 ----------------------
SIST HD 22.1 S4:2003
- 3 - HD 22.1 S4:2002
Contents
Page
1 General
1.1 Scope. 4
1.2 Object . 4
1.3 Common marking . 4
2 Definitions
2.1 Definitions relating to insulating and sheathing materials and their processing . 4
2.2 Definitions relating to the tests .6
2.3 Rated voltage . 6
3 Marking
3.1 Indication of origin. 6
3.2 Continuity of marks . 7
3.3 Durability. 7
3.4 Legibility. 7
3.5 Common marking . 7
3.6 Use of the name CENELEC . 8
3.7 Code designation . 8
4 Core identification
4.1 General requirements . 8
4.2 Colour schemes . 8
4.3 Colour combination green-and-yellow . 9
4.4 Core identification of flexible cables by the 'Marking by inscription' method . 9
5 General requirements for the construction of cables
5.1 Conductors . 9
5.2 Insulation . 10
5.3 Filler . 17
5.4 Textile braid . 17
5.5 Sheath. 18
5.6 Tests on completed cables . 26
6 Guide to use of the cables . 30
Annex A (normative) Normative references .31
Annex B (informative) National marking .32
---------------------- Page: 5 ----------------------
SIST HD 22.1 S4:2003
HD 22.1 S4:2002 - 4 -
1 General
1.1 Scope
HD 22 applies to rigid and flexible cables, sheathed and unsheathed, and insulated with
cross-linked material, of rated voltages U /U up to and including 450/750V, used in
o
power installations.
NOTE For some types of flexible cables, the term "cord" is used.
This Part 1 specifies the general requirements applicable to these cables.
The test methods specified are given in Part 2 of this Harmonization Document (HD), or
in the common test methods for cables given in EN 50265, EN 50266, EN 50267,
EN 50268 and EN 60811.
The particular types of cables are specified in Part 3 onwards of this HD, which are
hereafter referred to as "the particular specifications".
The code designations of these types of cables are in accordance with HD 361.
1.2 Object
The objects of this HD are to standardise cables and cords that are safe and reliable
when properly used, to state the characteristics and manufacturing requirements
directly or indirectly bearing on safety, and to specify methods for checking conformity
with those requirements.
1.3 Common marking
The common marking () signifies that the manufacturer has been assessed,
and his production is subjected to continuing surveillance in accordance with the
technical procedures, by a recognised national Approval Organisation, which is a
signatory to the "Agreement on the use of a Commonly Agreed Marking for Cables and
Cords complying with Harmonised Specifications."
Compliance with this HD may be certified by the application of the agreed technical
1)
procedures for granting the common marking , which are the recognised means of
ensuring that a manufacturer is competent and takes all reasonable care to produce
cables complying with this HD.
The common marking may be used, under these conditions, by manufacturers in
countries which have implemented this HD and in which the national Approval
Organisations are signatories to the Agreement.
NOTE See annex B for guidance on national marking.
2 Definitions
2.1 Definitions relating to insulating and sheathing materials and their processing
2.1.1 cross-linking
the process of multiple intermolecular covalent bonding between polymer
chains obtained through a chemical process, with or without the contribution of
heat, or through a physical process such as irradiation
1)
These are given in Appendices 4 and 5 of the 'Agreement on the use of a Commonly Agreed Marking for Cables and Cords
complying with Harmonised Specifications'.
---------------------- Page: 6 ----------------------
SIST HD 22.1 S4:2003
- 5 - HD 22.1 S4:2002
2.1.2 vulcanisation
a post-application treatment taking place after the insulation and/or sheath has
been applied in order to induce cross-linking of the rubber or synthetic
elastomer
NOTE Vulcanisation is an historical term now largely limited to use with the longer-established
materials which did, and in some cases still do, use sulphur as the primary chemical agent of
cross-linking.
2.1.3 type of compound
the category in which a compound is placed according to its properties, and
determined by specific tests. The type designation is not directly related to the
composition of the compound
2.1.4 rubber compound
combination of materials suitably selected, proportioned, treated, and
vulcanised, of which the characteristic constituent is a rubber and/or synthetic
elastomer
2.1.5 polychloroprene compound or equivalent synthetic elastomer
a vulcanised compound in which the elastomer is polychloroprene (PCP) or
equivalent synthetic elastomer providing a compound with properties similar to
polychloroprene
2.1.6 chlorinated rubber compound
a vulcanised compound in which the characteristic constituent is a synthetic
chlorinated rubber, e.g. Polychloroprene (PCP), Chlorosulphonated
Polyethylene (CSP), Chlorinated Polyethylene (CPE), etc
2.1.7 ethylene-propylene rubber compound (EPR) or equivalent synthetic
elastomer
a cross-linked compound in which the elastomer is ethylene-propylene or
equivalent synthetic elastomer providing a compound with properties similar to
EPR
2.1.8 ethylene vinyl acetate rubber compound (EVA) or equivalent synthetic
elastomer
a cross-linked compound in which the elastomer is ethylene vinyl acetate or
equivalent synthetic elastomer providing a compound with properties similar to
EVA
2.1.9 polyolefin based cross-linked compound or equivalent synthetic
compound having a low level of emission of corrosive gases when
burned
a cross-linked compound in which the polymer is a polyolefin or equivalent
synthetic non-halogenated polymer providing a compound which, when
burned, has low emission of corrosive gases and is suitable for use in cables
which, when burned, have low emission of smoke
2.1.10 cross-linked polyvinyl chloride (XLPVC)
combinations of materials of which polyvinyl chloride is the characteristic
constituent, including adequate cross-linking agents, suitably selected,
proportioned and treated which when cross-linked, meet the requirements
given in the particular specification
2.1.11 cross-linked silicone rubber (SiR)
a compound based on a poly-siloxane polymer which, when cross-linked,
meets the requirements given for the particular cable
---------------------- Page: 7 ----------------------
SIST HD 22.1 S4:2003
HD 22.1 S4:2002 - 6 -
2.1.12 thermoplastic polyurethane compound (TMPU)
a thermoplastic compound based on polyurethane which meets the
requirements given in the particular specification
2.2 Definitions relating to the tests
2.2.1 type tests (Symbol T)
tests required to be made before supplying a type of cable covered by this
standard on a general commercial basis in order to demonstrate satisfactory
performance characteristics to meet the intended application. These 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
2.2.2 sample tests (Symbol S)
tests made on samples of completed cable, or components taken from a
completed cable adequate to verify that the finished product meets the design
specifications
2.2.3 routine tests (Symbol R)
tests made on all production cable lengths to demonstrate their integrity
2.3 rated voltage
the rated voltage of a cable is the reference voltage for which the cable is designed,
and which serves to define the electrical tests
The rated voltage is expressed by the combination of two values U /U, expressed in
o
volts:
- U being the r.m.s. value between any insulated conductor and "earth" (metal
o
covering of the cable or the surrounding medium);
- U being the r.m.s. value between any two phase-conductors of a multicore cable
or of a system of single-core cables.
In an alternating current system, the rated voltage of a cable shall be at least equal to
the nominal voltage of the system for which it is intended.
This condition applies both to the value U and to the value U.
o
In a direct current system, the nominal voltage between conductors shall be not higher
than 1,5 times the rated voltage (U) of the cable, and the nominal voltage between any
conductor and earth shall not be more than 1,5 times the rated voltage (U ) of the
o
cable.
NOTE The operating voltage of a system may permanently exceed the nominal voltage of such a system by
10 %. A cable can be used at a 10 % higher operating voltage than its rated voltage if the latter is at least
equal to the nominal voltage of the system.
3 Marking
3.1 Indication of origin
Cables shall be provided with an identification of origin consisting of either
1. the manufacturer's identification thread, or,
2. the continuous marking of the manufacturer's name or trademark, or (if legally
protected) identification number, by one of the three following methods:
a) printed tape within the cable;
---------------------- Page: 8 ----------------------
SIST HD 22.1 S4:2003
- 7 - HD 22.1 S4:2002
b) printing, indenting or embossing on the insulation of at least one core (the core
coloured blue, if any);
c) printing, indenting or embossing on the sheath, if any.
3.2 Continuity of marks
Each specified mark 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 if the marking is on the outer sheath or the covering of the cable;
- 275 mm if the marking is:
i) on the insulation of an unsheathed cable;
ii) on the insulation of a sheathed cable;
iii) on a tape within a sheathed cable.
NOTE A 'Specified Mark' is any mandatory mark covered by this Part of the HD or by the particular
requirements of Part 3 onwards of this HD, or the optional common marking ().
The diagram below shows an example of the marking as used on the outer sheath of
the cable.
3.3 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked
by the test given in 1.8 of Part 2.
3.4 Legibility
All markings shall be legible.
The colours of the identification threads shall be easy to recognise or easily made
recognisable, if necessary by cleaning with petrol or other suitable solvent.
3.5 Common marking
If the common marking () is used, it shall be as specified in the "Agreement on
the use of a Commonly Agreed Marking for Cables and Cords complying with
Harmonised Specifications". It shall consist of either
1. the common thread as specified and allotted in appendix 2 to the above mentioned
"Agreement", or,
2. a continuous (see 3.2) marking of the symbols specified and allotted in appendix 1
to the above mentioned "Agreement", by one of the three methods a), b), c)
specified in 3.1.
---------------------- Page: 9 ----------------------
SIST HD 22.1 S4:2003
HD 22.1 S4:2002 - 8 -
3.6 Use of the name CENELEC
The name CENELEC, in full or abbreviated, shall not be marked on, or in, the cables.
3.7 Code designation
Each cable or cord shall have its full code designation marked continuously (see 3.2)
on the sheath or, where permitted by the particular specifications in Part 3 onwards of
this HD, on the insulation of one core. The code designation for each cable is given in
the particular specifications in Part 3 onwards of this HD.
NOTE The particular specifications of Part 3 onwards of this HD presently specify either no such marking,
or only part of the code designation. The requirement in this 3.7 supersedes that in the particular
specifications, which will be amended in due course.
4 Core identification
4.1 General requirements
Identification of the cores of a cable shall be achieved by the use of coloured insulation
or by a coloured surface.
Each core of a multicore cable shall have only one colour, except the core identified by
a combination of the colours green-and-yellow. In multicore cables, the colours green
and yellow shall not be used separately as single colours.
The colours shall be clearly identifiable and durable. Durability shall be checked by the
test given in 1.8 of Part 2.
4.2 Colour schemes
4.2.1 Flexible cables
The core colours, and their rotational position, for flexible cables and cords
shall be in accordance with HD 308.
4.2.2 Single core non-sheathed cables
The core colours, which should be a reasonable match to those given in
HD 402, shall be chosen from the following:
a) for cable types rated 300/500 V (H05 types) the following mono-
colours are recognised: black, blue, brown, grey, orange, pink, red,
turquoise, violet, white, green and yellow. Bi-colours or any
combination of the above mono-colours are permitted. The distribution
of the colours for the core bi-coloured green-and-yellow shall comply
with 4.3 of Part 1;
NOTE The use of green or yellow in some countries may be forbidden or restricted by
National safety or other regulations. In some countries, green is specifically permitted for
decorative chains.
b) for cable types rated 450/750 V (H07 types) the following mono-
colours are recognised: black, blue, brown, grey, orange, pink, red,
turquoise, violet and white.
Bi-colours shall not be used except the combination of the mono-
colours green and yellow, the distribution of the colours of which shall
comply with 4.3 of Part 1.
NOTE Other mono-colours are permitted by National standards, pending CENELEC TC 64
harmonization of installation rules.
---------------------- Page: 10 ----------------------
SIST HD 22.1 S4:2003
- 9 - HD 22.1 S4:2002
4.3 Colour combination green-and-yellow
The distribution of the colours for the core coloured green-and-yellow shall comply with
the following condition: for every 15 mm length of core, one of these colours shall cover
at least 30 % and not more than 70 % of the surface of the core, the other colour
covering the remainder.
NOTE Information on the use of the colours green-and-yellow and blue.
It is understood that the colours green and yellow when they are combined as specified above are recognised
exclusively as a means of identification of the core intended for use at earth connection or similar protection,
and that the colour blue is intended for the identification of the core intended to be connected to neutral. If,
however, there is no neutral, blue can be used to identify any core except the earthing or protective conductor.
4.4 Core identification of flexible cables by the 'Marking by inscription' method
Where the cores of cables are identified by marking by inscription, this shall be in
accordance with EN 50334.
For special types of cable in this HD (see for instance HD 22.4, clause 6) other means
of identification are permitted.
5 General requirements for the construction of cables
5.1 Conductors
5.1.1 Material
The conductors shall consist of annealed copper. Unless otherwise specified in
the particular specifications, the wires of conductors may be plain or metal
coated, for example with tin or silver. Coated wires shall be covered with an
effective layer of the coating.
5.1.2 Construction
The maximum diameters of the wires of flexible conductors and the minimum
number of wires of rigid conductors shall be in accordance with HD 383, unless
otherwise specified in the particular specifications.
The classes of the conductors relevant to the various types of cables are given
in the particular specifications.
5.1.3 Separator between conductor and insulation
If permitted or required in the particular specification a separating tape may or
shall be placed between the conductor and the insulation.
5.1.4 Check of construction
Compliance with the requirements of 5.1.1 and 5.1.2 of Part 1, including the
requirements of HD 383, shall be checked by inspection and by measurement.
5.1.5 Electrical resistance
Unless otherwise specified in the particular specifications, the resistance of
o
each conductor at 20 C shall be in accordance with the requirements of
HD 383 for the given class of the conductor.
Compliance shall be checked by the test given in 2.1 of Part 2.
---------------------- Page: 11 ----------------------
SIST HD 22.1 S4:2003
HD 22.1 S4:2002 - 10 -
5.1.6 Solderability test for plain conductors
To assess any possible interaction between insulation and bare copper
conductor, plain conductors shall comply with the solderability test specified in
1.12 of Part 2, unless otherwise specified in the particular specifications of the
HD.
5.2 Insulation
5.2.1 Material
The insulation shall be a cross-linked or vulcanised material, of the type
specified for each type of cable in the particular specifications:
Type EI 2 for cables insulated with silicone rubber compound;
Type EI 3 for cables insulated with EVA or equivalent
material;
Type EI 4 for cables insulated with ordinary ethylene-
propylene rubber compound;
Types EI 5 and EI 8 for cables insulated with polyolefin-based cross-
linked compound having a low level of emission of
corrosive gases when burned and which is suitable
for use in cables which, when burned, have low
emission of smoke. Type EI 8 is for flexible cables;
Types EI 6 and EI 7 for cables insulated with ethylene propylene rubber
or equivalent synthetic elastomer. Type EI 6 is for
o
cables requiring handling down to -40 C;
Type XI 1 for cables insulated with cross-linked PVC.
The test requirements for these compounds are specified in Part 1, Table 1.
NOTE 1 The requirements for XI 1 are presently in annex A of HD 22.14 S2.
The maximum continuous conductor operating temperatures for each
insulation compound, and the maximum temperatures for short-circuit
conditions, are given in Table 1.
o
NOTE 2 The value of 180 C for Type EI 2 applies only if there are no limits imposed by
environmental conditions.
NOTE 3 The maximum operating and short-circuit temperatures for a particular cable may be
lower than that given for the specific insulation compound. See HD 516 for further guidance.
5.2.2 Application to the conductor
The insulation shall be closely applied to the conductor or separator. In the
particular specifications it is stated, for each type of cable, whether the
insulation shall be applied in a single layer or in a number of layers, and
whether it shall or shall not be covered with a proofed tape. It shall be possible
to remove the insulation, without damage to the insulation itself, to the
conductor, or to the tin or metal coating if any. Compliance shall be checked by
inspection and by manual test.
5.2.3 Thickness
The mean value of the thickness of insulation shall be not less than the
specified value for each type and size of cable shown in the tables of the
particular specifications.
---------------------- Page: 12 ----------------------
SIST HD 22.1 S4:2003
- 11 - HD 22.1 S4:2002
However, the thickness at any place may be less than the specified value,
provided that the difference does not exceed 0,1 mm + 10 % of the specified
value.
Compliance shall be checked by the test given in 1.9 of Part 2.
5.2.4 Mechanical properties before and after ageing
The insulation shall have appropriate mechanical characteristics within the
temperature limits to which it may be exposed in normal use.
Compliance shall be checked by carrying out the tests specified in Part 1,
Table 1.
The applicable test methods and the results to be obtained are specified in
Part 1, Table 1.
---------------------- Page: 13 ----------------------
HD 22.1 S4:2002 - 12 -
SIST HD 22.1 S4:2003
Table 1 - Requirements for the non-electrical tests for cross-linked insulation
1 2 3 4 5 6 7 8 9 10 11 12
Ref Test Unit Test method Type of compound
No. described in
EN 60811 *
Section Clause EI 2 EI 3 EI 4 EI 5 EI 6 EI 7 EI 8
Maximum continuous conductor 180 110 60 90 90 90 70
°C
temperature (but see
5.2.1)
Maximum temperature for short
350 250 200 250 250 250 250
°C
circuit conditions
1 Mechanical properties
1.1 Properties before ageing 1-1 9.1
1.1.1 Values to be obtained for the
tensile strength:
2
- median, min. N/mm 5,0 6,5 5,0 10,0 5,0 5,0 5,0
1.1.2 Values to be obtained for the
elongation at break:
- median, min. % 150 200 200 125 200 200 125
1.2 Properties after ageing in air oven 1-2 8.1
2) 4)
1.2.1 Ageing conditions:
- temperature
°C 200 ± 3 150 ± 2 100 ± 2 135 ± 2 135 ± 2 135 ± 2 110 ± 2
- duration of treatment h 10 x 24 10 x 24 7 x 24 7 x 24 7 x 24 7 x 24 7 x 24
1.2.2 Value to be obtained for the
tensile strength:
2
- median, min. N/mm 4,0 - 4,2 - 5,0 5,0 -
1) 3)
- variation max. % - - 30
± 30 ± 25 ± 30 ± 30 ± 30
1.2.3 Values to be obtained for the
elongation at break:
- median, min. % 120 - 200 - - - 125
1)
- variation max. % -
± 30 ± 25 ± 30 ± 30 ± 30 ± 30
NOTES: see end of table.
---------------------- Page: 14 ----------------------
- 13 - HD 22.1 S4:2002
SIST HD 22.1 S4:2003
Table 1 - Requirements for the non-electrical tests for cross-linked insulation
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.