Ministry of Defence Defence Standard 61-12(Part 26)

Transcription

1 Ministry of Defence Defence Standard 61-12(Part 26) Issue 3 Publication Date 27 January 2001 Wires, Cords and Cables, Electrical Part 26: Wires, and Cables Electrical, Dual Extruded Insulation Type Olefin/vinylidene-Fluoride and Screened and Jacketed Sectional Specification Reprinted 20 th May 2011 to Incorporate Amendment 2

2 AMENDMENT RECORD Amd No Date Text Affected Signature and Date 1 12/10/01 Clauses 0, 1, 3, 6, 8, 9 and 10 and Tables IA to IG 2 20/05/11 Clauses 1.1, 6.2, 6.3, 9.1, 12.20, 12.32, and Table D REVISION NOTE This standard is raised to Issue 3 to update its content. HISTORICAL RECORD This standard supersedes the following: Defence Standard (Def Stan) (Part 26) Issue 2 dated 14 th December Def Stan (Part 26) Issue 2 dated 14 th December 1994 superseded Def Stan (Part 26) Issue 1 dated 25 th March 1985 Def Stan (Part 26) Issue 1 dated 25 th March 1985 superseded specifications EL 2109 and EL 2109M

3 CONTENT Description Page Content 1 Preface 3 Main Text 4 SECTION 1 GENERAL REQUIREMENTS 0 Introduction 4 1 Scope 4 2 Warning 5 3 Related Documents 5 4 Definitions 6 5 Abbreviations 6 SECTION 2 MATERIALS AND CONSTRUCTION 6 Materials 7 7 Construction 8 SECTION 3 CABLE AND WIRE TYPES, IDENTIFCATION AND PACKAGING 8 Cable and wires types 9 9 Marking and identification 9 10 Packaging and labelling 10 SECTION 4 TESTS AND SAMPLE SIZES 11 List of tests and sample sizes 11 SECTION 5 TESTS AND PARAMETERS 12 Tests 13 Table A Table of tests 12 Table B1 Test parameters (thin wall insulation) 16 Table B2 Test parameters (thick wall insulation) 16 Table C Dynamic cut through forces 17 Table D Fluid test list 19 Table E Scrape abrasion test 21 1

4 Table IA Wire Type 2, Single core, without screen or jacket (suitable for use without additional protection) and Cable Type 2, Single core, with screen and jacket (suitable for use without additional protection). 22 Table IB Wire Type 3, Single core, without screen or jacket (suitable for use without additional protection) and Cable Type 3, Single core, with screen and jacket (suitable for use without additional protection). 23 Table IC Cable Type 2 and Type 3, Two core, without screen or jacket, (suitable for use without additional protection), Cable Type 2 and Type 3, Two core, with screen or jacket (suitable for use without additional protection). 24 Table ID Cable Type 2 and Type 3, Three core, without screen or jacket, (suitable for use without additional protection), Cable Type 2and Type 3, Three core, with screen and jacket (suitable for use without additional protection). 25 Table IE Cable Type 2 and Type 3, Four core, with screen and jacket (suitable for use without additional protection). 26 Table IF Wire Type 8, Single core, without screen or jacket and Cable Type 8, Single core, with screen and jacket. 27 Table IG Table 1G: Wire Type 9, Single core, without screen or jacket and Cable Type 9, Single core, with screen and jacket. 28 2

5 PREFACE Standards for Defence Wires, Cords and Cables, Electrical, Metric Units Part 26: Wires and Cables Electrical, Dual Extruded Insulation Type Olefin/vinylidene -Fluoride and Screened and Jacketed a. This standard specifies the requirements for and lists wires and cables electrical, dual extruded insulation, 135 C tin plated and silver-plated conductors for Ministry of Defence use. Tables 1A to 1E inclusive contain the range of thick wall insulation wires and cables. Tables 1F and 1G contain the range of thin wall insulation wires and cables. b. This standard has been produced on behalf of the Standardization Advisory Group (SAG) by the Defence Airborne Cables Standardization Coittee (DACSC). c. This standard has been agreed by the authorities concerned with its use and is intended to be used whenever relevant in all future designs, contracts, orders etc. and whenever practicable by amendment to those already in existence. If any difficulty arises which prevents application of the Defence Standard, the Directorate of Standardization (DStan) shall be informed so that a remedy may be sought. d. Any enquiries regarding this standard in relation to an invitation to tender or a contract in which it is incorporated are to be addressed to the responsible technical or supervising authority named in the invitation to tender or contract. e. Compliance with this Defence Standard shall not in itself relieve any person from any legal obligations imposed upon them. f. This standard has been devised solely for the use of the Ministry of Defence (MOD) and its contractors in the execution of contracts for the MOD. To the extent permitted by law, the MOD hereby excludes all liability whatsoever and howsoever arising (including, but without limitation, liability resulting from negligence) for any loss or damage however caused when the standard is used for any other purpose. 3

6 TEXT Standards for Defence Wires, Cords and Cables, Electrical, Metric Units Part 26: Wires and Cables Electrical, Dual Extruded Insulation Type Olefin/vinylidene -Fluoride and Screened and Jacketed SECTION 1. GENERAL REQUIREMENTS 0 INTRODUCTION This standard specifies the requirements for wires and cables insulated with cross-linked polyolefin and cross-linked polyvinylidene fluoride and, where applicable, jacketed with cross-linked polyvinylidene fluoride. 1 SCOPE 1.1 This standard specifies requirements for airframe wires and cables in temperature category 135 C, with medium and thin wall insulation. This insulation system has been tested for use in aerospace applications using 115 volts (phase to neutral), 400 hertz ac and 28 volts dc. Verification of the suitability of this product for use in other electrical system configuration levels is the responsibility of the user. 1.2 These wires and cables are suitable for fixed wiring at temperatures from 135 C maximum down to minus 75 C but are not suitable for severe flexing at temperatures below minus 40 C. 1.3 These wires and cables do not support combustion and will withstand contamination by ester based lubricants and by ester based hydraulic fluids. 1.4 The thick wall insulated wires and cables, types 2 and 3, are normally available where dimensional replacements for those wires and cables listed in BS 2G 221 are required for wiring without further protection. 1.5 The thin wall insulated wires and cables, types 8 and 9, are intended for internal wiring of equipment. 4

7 SECTION 1. GENERAL REQUIREMENTS 2 WARNING The Ministry of Defence (MOD), like its contractors, is subject to both United Kingdom and European laws regarding Health and Safety at Work, without exemption. All Defence Standards either directly or indirectly invoke the use of processes and procedures that could be injurious to health if adequate precautions are not taken. Defence Standards or their use in no way absolves users from complying with statutory and legal requirements relating to Health and Safety at Work. 3 RELATED DOCUMENTS 3.1 The publications shown below are referred to in the text of this standard. Publications are grouped and listed in alpha numeric order. Designation BS 2G 221 BS 3G 230 BS 3G 231 BS 1595 BS 2713 BS 6476C BS 7207 Def Stan (Part 0) Def Stan Def Stan Def Stan DTD/900/4725 DTD/900/4907 DTD/900/4955 ISO 1817 MIL-C Title Minyvin Type Electric Cables (Metric Units) General Requirements for Aircraft Electrical Cables Conductors for General Purpose Aircraft Electrical Cables and Aerospace Applications Propan-2-ol (Isopropyl Alcohol) for Industrial Use Specification for 2-ethoxyethanol (ethylene glycol monoethyl ether) Colour Chart for Insulation and Sheath of Electric Cables Specification for crude vegetable fats Wires Cords and Cables Electrical. General Requirements and Test Methods Hydraulic Fluid, Petroleum: Normal NATO Code: H520 Joint Service Designation: OM 18 Turbine Fuel, Aviation: Kerosene Type, Containing Fuel System Icing Inhibitor NATO Code: F 34 Joint Service Designation: AVTUR/FSII Turbine Fuel, Aviation: Kerosene Type, Jet A-1 NATO Code: F35 Joint Service Designation: AVTUR (DERD 2494) Rubber, Vulcanised. Determination of the effect of fluids Cleaning compounds, Aircraft Surface 3.2 Reference in this standard to any related document means in any invitation to tender or contract the edition and all amendments current at the date of such tender or contract unless a specific edition is indicated. 5

8 SECTION 1. GENERAL REQUIREMENTS 3.3 In consideration of 3.2 above, users shall be fully aware of the issue and amendment status of all related documents, particularly when forming part of an invitation to tender or contract. Responsibility for the correct application of standards rests with users. 3.4 DStan can advise regarding where related documents are obtained from. Requests for such information can be made to the DStan Helpdesk. How to contact the helpdesk is shown on the outside rear cover of Def Stans. 4 DEFINITIONS For the purpose of this standard the definitions given in BS 3G 230 apply, with the exception of the following: 4.1 Wire electrical Defined as a single metallic conductor of solid, stranded or tinsel construction designed to carry current in an electrical circuit. It may be bare or insulated but does not have a metallic covering, jacket or shield. 4.2 Cable, power, electrical Defined as one or more wires with an outer overall metallic covering/screen and/or jacket. Two or more insulated conductors twisted or moulded together without a coon covering. The rated working voltage of the item shall be 250V or more and the size of each individual conductor shall be or larger. 5 ABBREVIATIONS Designation BS DACSC Def Stan DMSC DStan Fig MOD NATO NSN SAG Title British Standard Defence Airborne Cables Standardization Coittee Defence Standard Defence Materiel Standardization Coittee Directorate of Standardization Figure Ministry of Defence North Atlantic Treaty Organisation NATO Stock Number Standardization Advisory Group 6

9 SECTION 2. MATERIALS AND CONSTRUCTION 6 MATERIALS 6.1 Conductors and braiding Tinned annealed copper conductors shall comply with BS 3G 231 with respect to basic material and quality of tinning Conductors of high strength silver-plated copper alloy shall comply with BS 3G 231 with respect to basic material and plating and shall be plated to a radial thickness of not less than 1μm Strands taken from the conductors of the finished wires or cables shall meet the tensile strength and elongation at break tests specified in BS 3G 231 clause 4. BS 3G 231 Table 3 shall be considered to be extended to cover strand diameters of 0.08 to 0.2 with the requirements remaining as stated. Strands to be used for braiding shall be tested before being woven. 6.2 Insulation The insulation is made up of two layers of material namely primary and secondary. The insulation shall consist of cross-linked polyolefin and shall be of such a quality that the requirements of this standard are met Secondary layer of insulation The insulation shall consist of UV laser markable cross-linked modified polyvinylidene fluoride and shall be of such a quality that all the requirements of this standard are met. Wire and cable types 8 and 9 are not required to be UV laser markable. 6.3 Jacket The jacket shall consist of UV laser markable cross-linked modified polyvinylidene fluoride and shall be of such a quality that all the requirements of this standard are met. Jacketed variants of wire and cable types 8 and 9 are not required to be UV laser markable. 6.4 Colour The secondary insulation shall be coloured. This insulation and any jacket shall be a reasonable colour match with those of BS 6476C. 7

10 SECTION 2. MATERIALS AND CONSTRUCTION 7 CONSTRUCTION 7.1 Conductors Conductors shall be constructed as specified in BS 3G 231 clause 3 except that the number of strands in the conductor and the diameter of the conductor shall be as stated in the Tables of this Standard. 7.2 Insulation The primary and secondary insulation shall be applied by extrusion to fit closely round the conductor and shall be to a uniform circular cross section with a concentricity of greater than 70% throughout the length of the cable. The insulation shall not be loose but it shall be possible to strip it from the conductor leaving the latter in a condition sufficiently clean to permit satisfactory connection to a termination. The insulation thickness shall comply with the relevant tables for the types of cables and wires covered by this standard Secondary layer of insulation A secondary layer of insulation of cross-linked modified polyvinylidene fluoride shall be applied uniformly over the primary insulation, to a thickness shown in the appropriate tables, having an overall concentricity greater than 70%. 8

11 SECTION 3. CABLE AND WIRE TYPES, IDENTIFICATION AND PACKAGING 8 CABLE AND WIRE TYPES. 8.1 Wires Type 2 Wire and cable, single core, single core screened and jacketed, multicore and multicore screened and jacketed, tinned copper conductors, in sizes 24 to 0000, thick wall insulation. Suitable for wiring without further protection. Table 1A and 1C to 1E. 8.2 Wires Type 3 Wire and cable, single core, single core screened and jacketed, multicore and multicore screened and jacketed, silver-plated high strength copper alloy conductors, in sizes 26 to 24, thick wall insulation. Suitable for wiring without further protection. Tables 1B to 1E. 8.3 Wires Type 8. Wire and cable, single core and single core screened and jacketed, tinned copper conductors, in sizes 28 to 12, thin wall insulation. Suitable for the internal wiring of equipment. Table 1F. 8.4 Wires Type 9 Wire and cable, single core and single core screened and jacketed, silver-plated high strength copper alloy conductors, in sizes 30 to 24, thin wall insulation. Suitable for the internal wiring of equipment. Table IG. 9 MARKING AND IDENTIFICATION 9.1 Unless otherwise specified in the contract, the cable type, the number corresponding to the conductor size and the number of cores and construction, shall identify all wires or cables. On the outside surface, a code to identify the country of origin manufacturer and year of manufacture, in accordance with BS 3G 230, shall be durably and legibly printed iediately after the type and size identification (see example below). Wires type 3, single and multicore, without screen or jacket, size 26 AWG do not require a mark. Wire types 8 and 9 do not require any marking Printing DSP26-2T SJ - GB A Printing shall be in a colour that is a contrast to that of the insulation or jacketed as applicable. The horizontal axis of the characters shall be parallel to the axis of the cable for cables with an outside diameter greater than 1.25 and at right angles to the axis of the cable for cables with an outside diameter of 1.25 or less. The height of the characters 9

12 shall be approximately two thirds of the overall diameter of the cable for sizes up to 10 and shall remain at the height for size 10 for all larger sizes. The printing will be repeated at intervals of 250 to 500. SECTION 3. CABLE AND WIRE TYPES, IDENTIFICATION AND PACKAGING Colours Unless otherwise specified in the contract, the insulation for single core cables shall be coloured white. Multicore cables shall be coloured in accordance with BS 3G 230. If the insulation on a single core or the jacket on any other wire type, requires to be coloured anything other than white, then a number, from the list below, shall be added to the Part No (see example below) Code Colour 0 Black 1 Brown 2 Red 2L Light Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet 8 Grey 9 White DSP26-2T SJ -2L 10 PACKAGING AND LABELLING Packaging and labelling shall be as stated in the contract. 10

13 SECTION 4. TESTS AND SAMPLE SIZES 11 LIST OF TESTS AND SAMPLE SIZES 11.1 The manufacturer shall have as a minimum carried out tests on representative samples from Table A, column (a) if conformance to this standard is claimed. Evidence of such tests shall be supplied to the purchaser The tests listed in Table A, column (b) shall be performed in accordance with BS 3G 230 clause 7.1 (b) on separate specimens of representative sample of each cable type The tests specified in Table A, column (c) shall be carried out in accordance with BS 3G 230 clause 7.1 (c) The tests specified in Table A column (d) shall be carried out in accordance with BS 3G 230 clauses 7.1 (d) All specimens shall meet the requirements of this Standard. 11

14 SECTION 4. TESTS AND SAMPLE SIZES Table A: Table of tests Description of tests Clause no a b c d Visual examination 12.1 * * * * Mass 12.2 * * * Conductor composition and visual examination of strands 12.3 * * Overall wire and cable construction and dimensions 12.4 * * * Insulation thickness and concentricity 12.5 * * * Conductor tensile strength and elongation at break 12.6 * * * Strand plating continuity 12.7 * * Strand plating adherence 12.8 * * Strand plating thickness 12.9 * * Electrical resistance * * High voltage iersion * High voltage dry spark * * Voltage test on completed cable * * Insulation resistance * * Surface resistance * Accelerated ageing * * Delamination and shrinkage * * Delamination and insulation blockage * Cold bend * * Dynamic cut through * * Flaability * * Flame propagation * * Resistance to fluids * Flexibility * * Climatic * Tensile strength and elongation at break of insulation * * Scrape abrasion * * Colour fastness * Wire to wire abrasion * Overload resistance * Dry arc tracking * UV marking tests * 12

15 SECTION 5. TESTS AND PARAMETERS 12 TESTS 12.1 Visual examination The specimens shall meet the requirements of Def Stan (Part 0) Clause Mass The specimens shall meet the requirements of Def Stan (Part 0) Clause The mass shall not exceed 105% of the nominal value stated in the appropriate table of this Standard Conductor composition and visual examination of strands The specimens shall meet the requirements of Def Stan (Part 0) clauses 12.1 and Overall wire and cable construction and dimensions Specimens taken from each completed production drum shall be examined, measured and comply with clause 6 and the appropriate tables of this Standard Insulation thickness and concentricity The specimens shall meet the requirements of Def Stan (Part 0) clause and the appropriate tables of this Standard Conductor tensile strength and elongation at break The specimens shall meet the requirements of Def Stan (Part 0) clause Strand plating continuity The specimens shall meet the requirements of Def Stan (Part 0) clause Strand plating adherence The specimens shall meet the requirements of Def Stan (Part 0) clause Strand plating thickness The specimens shall meet the requirements of Def Stan (Part 0) clause Electrical resistance The specimens shall meet the requirements of Def Stan (Part 0) clause12.8 and shall comply with the figure specified in the appropriate table of this Standard. 13

16 SECTION 5. TESTS AND PARAMETERS High voltage iersion The specimens shall meet the requirements of Def Stan (Part 0) clause a. For wires Types 2 and 3 the applied voltage will be 2.5kV rms. b. For wires Types 8 and 9 the applied voltage will be 1 kv rms. c. For multicore cables between braid and test fluid the applied voltage shall be 1kV rms High voltage dry spark Def Stan (Part 0) clause or to be applied to the complete insulation of the wire For the primary insulation of wire Types 2 and 3, the applied voltage for test clause shall be 3 kv rms. and for test clause the peak potential shall be 6 kv. For the secondary insulation of wire Types 2 and 3, the applied voltage for test clause shall be 3 kv rms. and for BS 3G 230 test 16 (c) the peak potential shall be 10 kv For the primary insulation of wire Types 8 and 9, the applied voltage for test clause shall be 1.5 kv rms. and for test clause the peak potential shall be 5 kv. For the secondary insulation of wire Types 8 and 9, the applied voltage for test clause shall be 3 kv rms. and for test clause the peak potential shall be 8 kv Voltage test on completed cable All cable produced shall be subjected to and meet the requirements of BS 3G 230 test 16(d). In addition cables shall have the specified potential applied between the screen and a suitable electrode system on the jacket and shall meet the requirement of BS 3G 230 test 16 (d). For cables 8 and 9 the applied potential between conductor and screen and screen and the outer electrode shall be 1 kv rms Insulation resistance The specimens shall meet the requirements of Def Stan (Part 0) clauses and The test solution and requirements shall be as stated in BS 3G 230 test Surface resistance The specimens shall meet the requirements of Def Stan (Part 0) clauses

17 SECTION 5. TESTS AND PARAMETERS Accelerated ageing. The specimens shall meet the requirements of Def Stan (Part 0) clause Mandrel diameters and tensile forces shall be as specified in Table B. The specimens shall remain in the oven for 168 hours at a temperature of 200 C ± 3 C. The mandrel diameters and tensile forces for the room temperature bend test are given in Table B. 15

18 SECTION 5. TEST METHODS AND PARAMETERS Table B1: Test Parameters (thin wall insulation) Size Maximum Mandrel Minimum Tensile force N Ageing and Room Temperature Bend Flexibility Ageing and Room Temperature Bend Flexibility Cold Bend Wire Cable Wire Cable Table B2: Test Parameters (thick wall insulation) Size Maximum Mandrel Minimum Tensile force N Ageing and Room Temperature Bend Flexibility Ageing and Room Temperature Bend Flexibility Cold Bend Wire Cable Wire Cable

19 SECTION 5. TEST METHODS AND PARAMETERS Delamination and shrinkage The specimens shall meet the requirements of Def Stan (Part 0) clause The total length of conductor or screen exposed on completion of the test shall not exceed Delamination and insulation blockage The specimens shall meet the requirements of Def Stan (Part 0) clause The mandrel diameters and tensile forces are specified in Table B Cold bend The specimens shall meet the requirements of Def Stan (Part 0) clause Mandrel diameters shall be 20 times the nominal overall size of the wire or cable and the tensile force shall be as specified in Table B. The chamber temperature shall be minus 55 C ± 5 C and the pre-conditioning time 4 hours Dynamic cut-through The specimens shall meet the requirements of Def Stan (Part 0) clause Specimens shall be tested at a temperature 135 C ± 3 C the minimum force required to achieve cut through being specified in Table C. The rate of loading of the cutting edge shall be 1± 0.1 N/s. Table C: Dynamic Cut through Forces Size Minimum force N Type 2 and 3 Type 8 and

20 SECTION 5. TESTS AND PARAMETERS Flaability The specimens shall meet the requirements of Def Stan (Part 0) Clause The period of flame application shall be 15 seconds Flame propagation The specimens shall meet the requirements of Def Stan (Part 0) Clause The period of flame application shall be 15 seconds Resistance to fluids The specimens shall meet the requirements of Def Stan (Part 0) Clause The temperature and the fluids shall be as stated in Table D. The iersion time shall be 20 hours minimum. 18

21 SECTION 5. TEST METHODS AND PARAMETERS Table D: Fluid Test List Test fluid Specification Temperature (see note 3) Fuels Hydraulic fluids Aviation turbine Def Stan Def Stan C ± 2 C 70 C ± 2 C Kerosene ISO 1817 Liquid F 70 C ± 2 C Gasoline ISO 1817 Liquid B 40 C ± 2 C Mineral based Def Stan C ± 2 C (see Note 1) 70 C ± 2 C Phosphate ester based DTD 900/ C ± 5 C (synthetic) ISO 1817 Liquid C ± 2 C Silicone Based DTD 9OO/ C ± 5 C Dimethyl silicone, C ± 2 C 2 /s (CST) at 25 C (EX NATO S1714) Non Mineral Based (synthetic) 80% 2 Ethoxyethanol (Ethylene Glycol Monoethyl Ether) to BS 2713 and 20% Castor Oil to BS 7207 by volume 100 C ± 5 C Lubricating oils Mineral based D ENG RD 2450 Grade D C ± 5 C Ester based (synthetic) ISO 1817 Liquid C ± 5 C Solvents and cleaning fluids De-icing and antifreeze fluids Sullage Propan-2-ol (isopropyl alcohol) BS C ± 2 C Detergent cleaning fluid MIL-C C ± 2 C minimum ph 10 Kilfrost ABC DTD 900/ C ± 2 C 4 ± 0.1% formaldehyde plus 1 ± 0.1 % Cresylic acid (mixed isomers general purpose reagent) and 95% water (see Note 2) 23 C ± 2 C Salt water 3.5% NaCl 50 C ± 2 C Deionized water 50 C ± 2 C NOTE 1 NATO H-515 may be used as an alternative. NOTE 2 If difficulty is experienced in producing a solution, pure m-cresol may be used NOTE 3 Some test temperatures exceed the critical flash point temperature. Expert advice shall be sought on the conduct of these tests. 19

22 SECTION 5. TESTS AND PARAMETERS Flexibility Specimens of wire or cable shall be wound on a mandrel under a tensile force at a temperature of 20 C ± 5 C into a close helix of at least three turns. The diameter of the mandrels and the tensile forces applicable are specified in Table B. The test shall comprise of five cycles, each cycle consisting of winding the wire or cable onto the mandrel, unwinding and rewinding in the opposite direction, so that the surface of the cable inside the helix during one winding is on the outside of the helix during the succeeding winding. No part of the wire or cable shall show signs of cracking or other damage The same specimens shall then meet the requirements of the high voltage iersion test, see clause Climatic The specimens shall meet the requirements of Def Stan (Part 0) clause The climatic category shall be 65/135/10 the mandrel diameter shall be 5 times the cable OD and the low air pressure shall be 44.9 millibars (70,000 feet) Tensile strength and elongation at break of insulation The specimens shall meet the requirements of Def Stan (Part 0) clause The average elongation of the insulation achieved for all types of wire shall not be less than 150% The average tensile strength of the insulation achieved for Type 2 shall be: Size 24 to 12 inclusive Size 10 to 4 inclusive 17.5 N/ 2 minimum 14 N/ 2 minimum The average tensile strength of the insulation achieved for Type 3, Type 8 and Type 9 shall be 17.5 N/ 2 minimum Scrape Abrasion. (Applicable only to Types 2 and 3) The specimens shall meet the requirements of Def Stan (Part 0) clause The temperature shall 120 C. The force and number of cycles are given in Table E. 20

23 SECTION 5. TESTS AND PARAMETERS Table E: Scrape Abrasion Test Size Force N Minimum Cycles Colour fastness The specimens shall meet the requirements of Def Stan (Part 0) clauses 13.9 and Wire to wire abrasion The specimens shall meet the requirements of Def Stan (Part 0) clause The test shall be performed on a sample of with a load of 2.5 kg. The minimum number of cycles shall be 1,000,000. Applicable to Types 2 and Overload resistance The specimens shall meet the requirements of Def Stan (Part 0) clause Temperatures T 1 and T 2 shall be 200 C and 250 C respectively Dry arc tracking Specimens shall be subjected to the test specified in BS 3G 230 test 43 except as follows: Three samples of 5 looms shall be tested. If a sample fails, the test shall be repeated. If a failure occurs on re-test, the wire shall be rejected. The results of the test shall show that in a sample, no more than 5 wires of the 25 group A wire in a sample tested shall have open circuited, of which no more than 2 are to be from any one loom. The char length in any wire shall not exceed Requirements for user applied markings Ultra violet laser (excimer laser) A length of cable shall be marked using an ultra violet laser marking system at 150 intervals and tested in accordance with Defence Standard (Part 0) clause The Damp Heat Steady State test may be omitted. 21

24 Table 1A: Wire Type 2, Single core, without screen or jacket (suitable for use without additional protection) and Cable Type 2, Single core, with screen and jacket (suitable for use without additional protection) Part No NSN Size Stranding Number/ Nominal Conductor Maximum Primary Insulation Thickness Nominal Secondary Insulation Thickness Wire Jacket Thickness Cable Outside Nominal min max. min nom nom max DSP26-2T / DSP26-2T-22-1SJ DSP26-2T / DSP26-2T-20-1SJ DSP26-2T / DSP26-2T-18-1SJ DSP26-2T / DSP26-2T-16-1SJ DSP26-2T / DSP26-2T-14-1SJ DSP26-2T / DSP26-2T-12-1SJ DSP26-2T / DSP26-2T-10-1SJ DSP26-2T / DSP26-2T-8-1SJ DSP26-2T / DSP26-2T-6-1SJ DSP26-2T / DSP26-2T-4-1SJ DSP26-2T / DSP26-2T-2-1SJ DSP26-2T / DSP26-2T-0-1SJ DSP26-2T / DSP26-2T-00-1SJ DSP26-2T / DSP26-2T-000-1SJ DSP26-2T / DSP26-2T SJ Note 1: The upper NATO Stock number against each size denotes the wire and is only applicable to a wire which has white insulation Note 2: The lower NATO Stock number against each size denotes the cable and is only applicable to a cable which has white insulation and a white jacket Resistance Ohms/Km at 20 C Wire Nominal Mass Kg/Km Cable Max Mass Kg/Km DEF STAN 61-12(Part 26)/3 Amendment 2

25 Table 1B: Wire Type 3, Single core, without screen or jacket (suitable for use without additional protection) and Cable Type 3, Single core, with screen and jacket (suitable for use without additional protection) Part No NSN Size Stranding Number/ Nominal Conductor Max. Primary Insulation Thickness Nom Secondary Insulation Thickness Nom Wire Jacket Thickness Cable Outside Resistance Ohms/Km at 20 C max. Nominal Mass Kg/Km Cable Mass Max Kg/Km DSP26-3S DSP26-3S-26-1SJ DSP26-3S DSP26-3S-24-1SJ min max. min max. min nom min max / / wire screened Note 1: The upper NATO Stock number against each size denotes the wire and is only applicable to a wire which has white insulation Note 2: The lower NATO Stock number against each size denotes the cable and is only applicable to a cable which has white insulation and a white jacket DEF STAN 61-12(Part 26)/3 Amendment 2

26 Table 1C: Cable Type 2 and Type 3, Two core, without screen or jacket, (suitable for use without additional protection), Cable Type 2 and Type 3, Two core, with screen and jacket (suitable for use without additional protection). Part No NSN Size Jacket Thickness Outside min nom nom max Maximum Mass Kg/Km DSP26-3S DSP26-3S-26-2SJ DSP26-3S DSP26-3S-24-2SJ DSP26-2T DSP26-2T-22-2SJ DSP26-2T DSP26-2T-20-2SJ DSP26-2T DSP26-2T-18-2SJ DSP26-2T DSP26-2T-16-2SJ DSP26-2T DSP26-2T-14-2SJ DSP26-2T DSP26-2T-12-2SJ DEF STAN 61-12(Part 26)/3 Amendment 2 Note 1: 24 AWG and 26 AWG have a silver plated high strength copper alloy (SPHSCA) conductor

27 . Table 1D: Cable Type 2 and Type 3, Three core, without screen or jacket, (suitable for use without additional protection), Cable Type 2and Type 3, Three core, with screen and jacket (suitable for use without additional protection) Part No NSN Size Jacket Thickness Outside Maximum Mass Kg/Km min nom nom max. DSP26-3S DSP26-3S-26-3SJ DSP26-3S DSP26-3S-24-3SJ DSP26-2T DSP26-2T-22-3SJ DSP26-2T DSP26-2T-20-3SJ DSP26-2T DSP26-2T-18-3SJ DSP26-2T DSP26-2T-16-3SJ DSP26-2T DSP26-2T-14-3SJ DSP26-2T DSP26-2T-12-3SJ Note 1: 24 AWG and 26 AWG have a silver plated high strength copper alloy (SPHSCA) conductor DEF STAN 61-12(Part 26)/3 Amendment 2

28 Table 1E: Cable Type 2 and Type 3, Four core, with screen and jacket (suitable for use without additional protection) Part No NSN Size Jacket Thickness Outside min nom nom max Maximum Mass Kg/Km DSP26-3S-24-4SJ DSP26-2T-22-4SJ DSP26-2T-20-4SJ DSP26-2T-18-4SJ DSP26-2T-16-4SJ DSP26-2T-14-4SJ DSP26-2T-12-4SJ DEF STAN 61-12(Part 26)/3 Amendment 2 Note 1: 24 AWG has a silver plated high strength copper alloy (SPHSCA) conductor

29 Table 1F: Wire Type 8, Single core, without screen or jacket and Cable Type 8, Single core, with screen and jacket Part No NSN DSP26-8T DSP26-8T-28-1SJ DSP26-8T DSP26-8T-26-1SJ DSP26-8T DSP26-8T-24-1SJ DSP26-8T DSP26-8T-22-1SJ DSP26-8T DSP26-8T-20-1SJ DSP26-8T DSP26-8T-18-1SJ DSP26-8T DSP26-8T-16-1SJ DSP26-8T DSP26-8T-14-1SJ DSP26-8T DSP26-8T-12-1SJ Size Stranding Number/ Nominal Conductor Maximum Primary Insulation Thickness Nominal Secondary Insulation Thickness Wire min max 28 7/ / / / max / min / / / / Nominal of Braid Wire Dia Over Braid Wire Jacket Thickness Minimum METSH Cable min max Resistance OHMS/ Km at 20 C max wire Nominal Mass Kg/Km metsh Note 1: The upper NATO Stock Number against each size denotes the wire and is only applicable to a wire which has white insulation Note 2: The lower NATO Stock Number against each size denotes the cable and is only applicable to a cable which has white insulation and a white jacket DEF STAN 61-12(Part 26)/3 Amendment 2

30 . Table 1G: Wire Type 9, Single core, without screen or jacket and Cable Type 9, Single core, with screen and jacket Part No NSN DSP26-9S DSP26-9S 30-1SJ DSP26-9S DSP26-9S-28-1SJ DSP26-9S DSP26-9S-26-1SJ DSP26-9S DSP26-9S-24-1SJ Size Stranding Number/ Nominal Conductor Maximum Primary Insulation Thickness Nominal Secondary Insulation Thickness Wire min max 30 7/ / max min 26 19/ / Nominal of Braid Wire Dia Over Braid Wire Jacket Thickness Minimum Cable min max Note 1: The upper NATO Stock Number against each size denotes the wire and is only applicable to a wire which has white insulation Resistance OHMS/ Km at 20 C max Nominal Mass Kg/Km wire metsh DEF STAN 61-12(Part 26)/3 Amendment 2 Note 2: The lower NATO Stock Number against each size denotes the cable and is only applicable to a cable which has white insulation and a white jacket

31 Inside Rear Cover

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