IEC 60684-2:2025
(Main)Flexible insulating sleeving - Part 2: Methods of test
Flexible insulating sleeving - Part 2: Methods of test
IEC 60684-2:2025 gives methods of test for flexible insulating sleeving, including heat-shrinkable sleeving, intended primarily for insulating electrical conductors and connections of electrical apparatus, although they can be used for other purposes. The tests specified are designed to control the quality of the sleeving but it is recognized that they do not completely establish the suitability of sleeving for impregnation or encapsulation processes or for other specialized applications. Where necessary, the test methods in this document will be supplemented by appropriate impregnation or compatibility tests to suit the individual circumstances. This fourth edition cancels and replaces the third edition published in 2011.This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) major update of normative references;
b) revision of Clause 5, with amendment of methods for measurements of bore and wall thickness;
c) revision of Clause 11, to clarify that the longitudinal change test is done on expanded sleeving;
d) revision of Clause 28, additional method D for flame propagation testing;
e) revision of Clause 56, additional method for preparation of samples for adhesive peel test;
f) addition of Clause 63, abrasion test method;
g) addition of Clause 64, volume resistivity for semi-conducting materials;
h) addition of Clause 65, outgassing;
i) addition of Clause 66, resistance to weathering.
Gaines isolantes souples - Partie 2: Méthodes d'essai
L'IEC 60684-2:2025 donne les méthodes d'essai pour les gaines isolantes souples, y compris les gaines thermorétractables, initialement conçues pour isoler les conducteurs électriques et les connexions des appareils électriques, même si elles peuvent être utilisées à d'autres fins. Les essais spécifiés sont conçus pour contrôler la qualité des gaines, mais il reste entendu qu'ils ne permettent pas d'établir entièrement l'aptitude de celles-ci à l'imprégnation ou à l'enrobage, pas plus que leur aptitude à être utilisées pour d'autres applications spécialisées. S'il y a lieu, les méthodes d'essai spécifiées dans le présent document sont complétées par des essais appropriés d'imprégnation ou de compatibilité en fonction des cas particuliers.
Cette quatrième édition annule et remplace la troisième édition parue en 2011. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) mise à jour majeure des références normatives;
b) révision de l'Article 5, avec modification des méthodes de mesurage du diamètre intérieur et de l'épaisseur de paroi;
c) révision de l'Article 11, pour préciser que l'essai de variation longitudinale est effectué sur une gaine expansée;
d) révision de l'Article 28, méthode D supplémentaire pour les essais de propagation de la flamme;
e) révision de l'Article 56, méthode supplémentaire pour la préparation des échantillons d'essai d'arrachement adhésif;
f) ajout de l'Article 63, méthode d'essai d'abrasion;
g) ajout de l'Article 64, résistivité transversale pour les matériaux semiconducteurs;
h) ajout de l'Article 65, dégazage;
i) ajout de l'Article 66, résistance aux intempéries.
General Information
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Standards Content (Sample)
IEC 60684-2 ®
Edition 4.0 2025-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Flexible insulating sleeving –
Part 2: Methods of test
Gaines isolantes souples –
Partie 2: Méthodes d'essai
ICS 17.220.99 ISBN 978-2-8327-0378-6
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– 2 – IEC 60684-2:2025 © IEC 2025
CONTENTS
FOREWORD . 12
INTRODUCTION . 14
1 Scope . 15
2 Normative references . 15
3 Terms and definitions . 17
4 Test conditions . 17
4.1 Standard test conditions . 17
4.2 Elevated temperature test conditions . 17
4.3 Low temperature test conditions. 17
5 Measurements of bore, wall thickness and concentricity . 18
5.1 General . 18
5.2 Bore . 18
5.2.1 Number of test specimens . 18
5.2.2 General method . 18
5.2.3 Relaxed bore of expandable braided sleeving . 18
5.2.4 Expanded bore of expandable braided sleeving . 19
5.2.5 Result . 19
5.3 Wall thickness for textile sleeving . 19
5.3.1 Number of test specimens . 19
5.3.2 Procedure . 19
5.3.3 Result . 19
5.4 Minimum/maximum wall thickness and concentricity for extruded sleeving . 19
5.4.1 Number of test specimens . 19
5.4.2 Wall thickness . 19
5.4.3 Concentricity . 20
5.4.4 Result . 20
6 Density . 20
6.1 Number of test specimens . 20
6.2 Procedure . 20
6.3 Result . 21
7 Resistance to splitting after heating . 21
7.1 Number of test specimens . 21
7.2 Form of test specimen. 21
7.3 Procedure . 21
7.4 Result . 21
8 Heat shock (resistance to heat) . 21
8.1 Number of test specimens . 21
8.2 Form of test specimens . 21
8.3 Procedure . 21
8.4 Result . 22
9 Resistance to soldering heat. 22
9.1 Number of test specimens . 22
9.2 Form of test specimen. 22
9.3 Procedure . 22
9.4 Result . 22
10 Loss in mass on heating of uncoated textile glass sleeving . 22
10.1 Number and mass of test specimens . 22
10.2 Procedure . 23
10.3 Calculation . 23
10.4 Result . 23
11 Longitudinal change . 23
11.1 Number of test specimens . 23
11.2 Form of test specimen. 23
11.3 Procedure . 23
11.4 Calculation . 24
11.5 Result . 24
12 Deformation under load (resistance to pressure at elevated temperature) . 24
12.1 Method A . 24
12.1.1 Number of test specimens . 24
12.1.2 Form of test specimen . 24
12.1.3 Apparatus . 24
12.1.4 Procedure . 24
12.1.5 Result . 25
12.2 Method B . 25
12.2.1 Number of test specimen . 25
12.2.2 Form of test specimen . 25
12.2.3 Apparatus . 25
12.2.4 Procedure . 26
12.2.5 Result . 27
13 Thermal stability of PVC sleeving . 27
13.1 Principle . 27
13.2 Form of test specimen. 27
13.2.1 ISO 182-1 method . 27
13.2.2 ISO 182-2 method . 27
13.3 Procedure . 27
13.4 Result . 27
14 Volatile content of silicone sleeving . 27
14.1 Number and mass of test specimens . 27
14.2 Procedure . 27
14.3 Calculation . 28
14.4 Result . 28
15 Bending after heating . 28
15.1 Number of test specimens . 28
15.2 Form of test specimen. 28
15.3 Procedure . 28
15.4 Result . 29
16 Bending at low temperature . 29
16.1 Number and form of test specimens . 29
16.2 Procedure . 29
16.3 Result . 29
17 Brittleness temperature . 29
17.1 Form of test specimen. 29
17.2 Procedure . 29
17.3 Result . 29
– 4 – IEC 60684-2:2025 © IEC 2025
18 Dimensional stability on storage (applicable to heat-shrinkable sleeving only) . 29
18.1 Number and length of test specimens . 29
18.2 Procedure . 30
18.3 Result . 30
19 Hydrolysis of coating . 30
19.1 Number of test specimens . 30
19.2 Form of test specimen. 30
19.3 Procedure . 30
19.4 Result . 30
20 Flexibility (extruded sleeving only) . 31
20.1 Number and length of test specimens . 31
20.2 Procedure . 31
20.3 Result . 31
21 Tensile strength, tensile stress at 100 % elongation, elongation at break and
secant modulus at 2 % elongation . 31
21.1 General . 31
21.2 Tensile strength and elongation at break for full-section sleeving . 31
21.2.1 Number of test specimens . 31
21.2.2 Form of test specimen . 31
21.2.3 Conditioning . 32
21.2.4 Test temperature . 32
21.2.5 Procedure . 32
21.2.6 Calculations . 32
21.2.7 Result . 33
21.3 Tensile strength and elongation at break on dumb-bell specimens . 33
21.3.1 General . 33
21.3.2 Form of test specimen . 33
21.3.3 Procedure . 33
21.3.4 Result . 33
21.4 Tensile strength of uncoated glass textile sleeving . 34
21.4.1 General . 34
21.4.2 Procedure . 34
21.4.3 Results . 34
21.5 Secant modulus at 2 % elongation . 34
21.5.1 Number and form of test specimens . 34
21.5.2 Procedure . 34
21.5.3 Calculation . 35
21.5.4 Result . 35
21.6 Tensile stress at 100 % elongation . 35
21.6.1 General . 35
21.6.2 Calculation . 35
21.6.3 Result . 35
21.7 Tensile stress at 100 % elongation and at elevated temperature . 35
22 Fraying resistance test . 35
22.1 General . 35
22.2 Number and form of test specimens . 36
22.3 Procedure . 36
22.4 Calculation . 36
22.5 Result . 36
23 Breakdown voltage . 36
23.1 Principle . 36
23.1.1 General . 36
23.1.2 Number and form of test specimens . 37
23.1.3 Conditioning . 37
23.1.4 Application of voltage . 37
23.1.5 Test method modification . 37
23.1.6 Result . 37
23.2 Straight mandrel test, 100 mm foil electrode . 37
23.2.1 Test specimen . 37
23.2.2 Electrodes . 37
23.2.3 Procedure . 37
23.2.4 Result . 37
23.3 Test on cut-out specimens for large-size sleeving . 37
23.3.1 Test specimen . 37
23.3.2 Electrodes . 38
23.3.3 Procedure . 38
23.3.4 Result . 38
23.4 Tests at elevated temperature . 38
23.5 Tests after damp heat . 38
23.6 Result . 38
24 Insulation resistance . 38
24.1 Conditioning . 38
24.2 Form of test specimen. 39
24.3 Measurement of insulation resistance . 39
24.4 Test conditions . 39
24.4.1 Number of test specimens . 39
24.4.2 Tests at room temperature . 39
24.4.3 Tests at elevated temperature . 39
24.4.4 Tests after subjection to damp heat conditions . 39
24.5 Result . 39
25 Volume resistivity for insulating material . 39
25.1 General . 39
25.2 Conditioning . 40
25.3 Form of test specimen. 40
25.4 Measurement of volume resistivity . 40
25.5 Test conditions . 40
25.5.1 Number of test specimens . 40
25.5.2 Tests at room temperature . 40
25.5.3 Tests at elevated temperature . 40
25.5.4 Tests after subjection to damp heat conditions . 41
25.6 Result . 41
26 Permittivity and dissipation factor . 41
26.1 Number of test specimens . 41
26.2 Form of test specimen. 41
26.3 Electrodes . 41
26.4 Procedure . 41
– 6 – IEC 60684-2:2025 © IEC 2025
26.5 Calculation . 42
26.6 Result . 42
27 Resistance to tracking . 42
28 Flame propagation tests . 42
28.1 Principle . 42
28.2 Methods A and B . 42
28.2.1 General . 42
28.2.2 Number of test specimens . 42
28.2.3 Method A, applicable to sleeving up to and including 10 mm bore only . 42
28.2.4 Method B . 43
28.2.5 Source of heat . 43
28.2.6 Specimen arrangements . 43
28.2.7 Result . 43
28.3 Method C . 44
28.3.1 Number of test specimens . 44
28.3.2 Source of heat . 44
28.3.3 Cabinet and arrangements within it . 44
28.3.4 Procedure . 44
28.3.5 Result . 44
28.4 Method D . 45
28.4.1 Number of test specimens . 45
28.4.2 Cabinet and specimen arrangements . 45
28.4.3 Source of heat . 45
28.4.4 Procedure . 45
28.4.5 Result . 45
29 Oxygen index . 46
29.1 Oxygen index at ambient temperature . 46
29.2 Oxygen index at elevated temperature . 46
29.3 Results . 46
30 Transparency . 46
30.1 Number of test specimens . 46
30.2 Form of test specimen. 46
30.3 Procedure . 46
30.4 Result . 46
31 Ionic impurities test . 46
31.1 General . 46
31.2 Result . 47
32 Silver staining test . 47
32.1 Principle . 47
32.2 Number and form of test specimens . 47
32.3 Stain tester . 47
32.4 Procedure . 47
32.5 Result . 47
33 Electrolytic corrosion resistance . 47
33.1 General . 47
33.2 Number of test specimens . 48
34 Corrosion resistance (tensile and elongation) . 48
34.1 Principle . 48
34.2 Number and form of test specimens . 48
34.3 Procedure . 48
34.4 Result . 48
35 Copper corrosion (presence of corrosive volatiles) . 49
35.1 Principle . 49
35.2 Apparatus . 49
35.3 Number and form of test specimens . 49
35.4 Procedure . 49
35.5 Result . 50
36 Colour fastness to light . 50
36.1 Principle . 50
36.2 Test specimen . 50
36.3 Procedure . 50
36.4 Result . 50
37 Resistance to ozone . 50
37.1 General . 50
37.2 Number and form of test specimens . 50
37.3 Procedure . 50
37.4 Result . 50
38 Resistance to selected fluids . 51
38.1 Principle . 51
38.2 Choice of fluid . 51
38.3 Methods of assessment . 51
38.4 Number and form of test specimens . 51
38.5 Procedure . 51
38.6 Result . 52
39 Thermal endurance . 52
40 Mass per unit length . 52
40.1 Number of test specimens . 52
40.2 Procedure . 52
40.3 Result . 52
41 Heat ageing . 53
41.1 Number and form of test specimens . 53
41.2 Procedure . 53
41.3 Report (Bend test) . 53
42 Water absorption . 53
42.1 General . 53
42.2 Result . 53
43 Restricted shrinkage (applicable to heat-shrinkable sleeving only) . 53
43.1 Number of test specimens . 53
43.2 Form of test specimen. 53
43.3 Apparatus . 53
43.4 Procedure . 54
43.5 Result . 54
44 Colour stability to heat . 54
44.1 Number of test specimens . 54
44.2 Form of test specimens . 54
44.3 Procedure . 54
– 8 – IEC 60684-2:2025 © IEC 2025
44.4 Result . 54
45 Smoke index . 55
45.1 Definitions. 55
45.2 Principle . 55
45.3 Apparatus . 55
45.4 Number and form of test specimen . 55
45.5 Conditioning . 55
45.6 Mounting of test pieces . 55
45.7 Safety of operations . 56
45.8 Procedure . 56
45.9 Calculation of results . 57
45.9.1 General . 57
45.9.2 Correction of transmittance values . 57
45.9.3 Calculation of the smoke index . 58
45.10 Result . 59
46 Toxicity index . 59
46.1 General . 59
46.2 Principle . 60
46.3 Apparatus . 60
46.3.1 General . 60
46.3.2 Test chamber. 60
46.3.3 Burner . 60
46.3.4 Sample support . 60
46.3.5 Timing device . 61
46.3.6 Gas sampling and analytical equipment . 61
46.4 Test pieces . 61
46.4.1 General . 61
46.4.2 Conditioning . 61
46.5 Safety of operations . 61
46.6 Test procedure . 61
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