AS 1977-1977

1 - AS 1977-1977 FLEXIBLE INSULATING SLEEVING FOR ELECTRICAL PURPOSES
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE.
6 - 2 TYPES OF SLEEVING.
6 - 2.1 References.
6 - 2.2 Construction.
7 - 3 COLOUR.
7 - 3.1 Type 1 (Coated Textile) Sleeving.
7 - 3.2 Type 3 (PVC) Sleeving or Type 1 with PVC Coating.
8 - 3.3 Type 5 (Silicone) Sleeving or Type 1 with Silicone Elastomer Coating
8 - 3.4 Type 6 (PTFE) Sleeving.
8 - 3.5 Colour Fastness to Light.
8 - 4 FINISH.
9 - 5 DIMENSIONS AND TOLERANCES.
9 - 5.1 Length.
9 - 5.2 Bore Diameter and Wall Thickness.
10 - 6 TEST SPECIMENS.
10 - 7 TESTS.
10 - 8 TEST CONDITIONS.
10 - 9 MECHANICAL TESTS.
10 - 9.1 Resistance to Splitting.
10 - 9.2 Bending.
13 - 9.3. Flexibility.
13 - 9.4 Elongation at Break.
13 - 9.5 Tensile Strength.
13 - 10 CHEMICAL AND PHYSICAL TESTS.
13 - 10.1 Acidity.
13 - 10.2 Stability of Coating.
13 - 10.3 Shrinkage.
14 - 10.4 Cold Flow.
14 - 10.5 Resistance to Soldering Heat.
14 - 10.6 Rate of Burning.
15 - 10.7 Flame Retardance.
15 - 10.8 Volatile Content.
15 - 11 ELECTRICAL TESTS.
15 - 11.1 Voltage Proof Tests.
15 - 11.2 Insulation Resistance.
16 - 12 MOULD GROWTH.
16 - 13 ACCELERATED DAMP HEAT.
16 - 14 TRANSPARENCY.
18 - APPENDIX A - MEASUREMENT OF BORE DIAMETER AND WALL THICKNESS
18 - A1 INTRODUCTION.
18 - A2 BORE.
18 - A3 WALL THICKNESS.
19 - APPENDIX B - BENDING TESTS
19 - B1 INTRODUCTION.
19 - B2 SLEEVING‘ AS RECEIVED’.
19 - B3 HEAT AGED SLEEVING.
20 - B4 SLEEVING AT LOW TEMPERATURE.
21 - APPENDIX C - FLEXIBILITY TEST
21 - C1 INTRODUCTION.
21 - C2 TEST SPECIMEN.
21 - C3 CONDITIONING.
21 - C4 APPARATUS.
22 - C5 TEST TEMPERATURE.
22 - C6 PROCEDURE.
24 - APPENDIX D - TEST FOR TENSILE STRENGTH AND ELONGATION AT BREAK
24 - D1 INTRODUCTION.
24 - D2 TEST SPECIMENS.
24 - D3 CONDITIONING.
24 - D4 TEST TEMPERATURE.
24 - D5 PROCEDURE.
25 - D6 RESULTS.
26 - APPENDIX E - DETERMINATION OF ACIDITY
26 - E1 INTRODUCTION.
26 - E2 TEST PIECE.
26 - E3 PROCEDURE.
26 - E3.1 General.
26 - E3.2 Preparation of Water Extract.
26 - E3.3 Titration.
27 - E4 RESULTS.
28 - APPENDIX F - TEST FOR STABILITY OF COATING
28 - F1 INTRODUCTION.
28 - F2 PROCEDURE.
29 - APPENDIX G - SHRINKAGE TEST
29 - G1 INTRODUCTION.
29 - G2 PROCEDURE.
30 - APPENDIX H - COLD FLOW TEST
30 - H1 INTRODUCTION.
30 - H2 PROCEDURE.
31 - APPENDIX J - TEST FOR RESISTANCE TO SOLDERING HEAT
31 - J1 INTRODUCTION.
31 - J2 PROCEDURE.
33 - APPENDIX K - RATE OF BURNING TEST
33 - K1 INTRODUCTION.
33 - K2 APPARATUS.
33 - K3 PROCEDURE.
34 - APPENDIX L - FLAME RETARDANCE TEST
34 - L1 INTRODUCTION.
34 - L2 TEST SPECIMEN.
34 - L3 TEST CONDITIONS.
34 - L4 SOURCE OF HEAT.
34 - L5 TEST PROCEDURE.
36 - APPENDIX M - DETERMINATION OF VOLATILE CONTENT
36 - M1 INTRODUCTION.
36 - M2 TEST SPECIMENS.
36 - M3 PROCEDURE.
36 - M4 RESULTS.
37 - APPENDIX N - PROOF TEST FOR ELECTRIC STRENGTH
37 - N1 INTRODUCTION.
37 - N2 TEST SPECIMENS.
37 - N2.1 Bore Not Exceeding 3 mm Nominal Diameter.
37 - N2.2 Bore Exceeding 3 mm Nominal Diameter.
37 - N3 PROCEDURE.
37 - N3.1 Tests at Room Temperature.
38 - N3.2 Tests at Maximum Operating Temperature of Sleeving.
39 - N4 APPLICATION OF PROOF VOLTAGE.
40 - APPENDIX P - INSULATION RESISTANCE TESTS
40 - P1 INTRODUCTION.
40 - P2 TEST SPECIMENS.
40 - P3 PROCEDURE.
40 - P3.1 General.
40 - P3.2 Test in Air Under Normal Conditions.
40 - P3.3 Test on Sleeving After Accelerated Heat Treatment.
41 - P3.4 Determination of Insulation Resistance.
42 - APPENDIX Q - ACCELERATED DAMP HEAT TREATMENT
42 - Q1 INTRODUCTION.
42 - Q2 PROCEDURE.
43 - APPENDIX R - TRANSPARENCY TEST

Sets out requirements and dimensions for a range of sleevings of circular section primarily for insulation of conductors and apparatus connections. It includes sleevings made by varnishing or coating a textile base, and those formed by extrusion of suitable insulating materials. It does not apply to pre-stretched tubing. A range of test methods is included as appendices.

This specification sets out requirements and dimensions for a range of flexible insulating sleevings of circular section, intended primarily for the insulation of electrical conductors and connections of electrical apparatus. It includes sleevings made by the varnishing or coating of a textile base, and others formed by extrusion of suitable insulating materials.This specification does not apply to pre-stretched tubing.NOTES:1. Some of the types of sleeving included are also suitable, especially in the larger sizes, for the covering and holding together of a number of conductors which are already individually insulated.2. 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 varnish and wax impregnation processes or its suitability for use in contact with other materials. It is, therefore, recommended that appropriate impregnation or compatibility tests be agreed where necessary between the purchaser and the supplier to suit individual circumstances.