ISO-2032-1973.pdf

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1、INTERNATIONAL STANDAfNl 2032 INTERNATIONAL ORGANKATION FOR STANDARDlZATlON.MEXYHAPOAHAR OPl-AHIU3AWR II0 CTAHAAPTCI3AUAA.ORGANISATION INTERNATIONALE DE NORMALISATION Heat-resisting equipment wires for aircraft First edition - 1973-04-01 Gi UDC 629.7.064.5 : 621.315.2 Ref. No. IS0 2032-1973 (E) ii 7

2、Descriptors : aircraft, aircraft equipment, wires, electric wires, thermal resistance, specifications, materials specifications, tests, marking c-4 G 1 i3 Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical St

3、andards 1/9972545001 Not for Resale, 04/27/2007 02:34:31 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 Member Bodies). The work of developing

4、International Standards is carried out through IS0 Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, a

5、lso take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 2032 was drawn up by Technical Committee ISO/TC 20, Aircraft

6、 and space vehicles, and circulated to the Member Bodies in July 1970. It has been approved by the Member Bodies of the following countries : Brazil India Canada Israel Czechoslovakia Italy Egypt, Arab Rep. of Japan France Netherlands Greece New Zealand South Africa, Rep. of Spain Switzerland Thaila

7、nd United Kingdom The Member Bodies of the following countries expressed disapproval of the document on technical grounds : Belgium U.S.A. U.S.S.R. 0 International Organization for Standardization, 1973 ? Printed in Switzerland Copyright International Organization for Standardization Provided by IHS

8、 under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:34:31 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 2032-1973 (E) Heat-resisting equipment wires for aircraft 1 SCOPE AND FIELD OF APPLICATION T

9、his International Standard specifies the requirements for a range of equipment wires (hook-up wires) designed for the internal wiritig of meters, panels and electrical and electronic equipment for use on aircraft. Three classes of equipment wire are specified as follows : - Type A : for use at volta

10、ges up to 250 V r.m.s. - Type B : for use at voltages up to 600 V r m.s. - Type C : for use at voltages up to 1 000 V r.m.s. The wires are suitable for use where, in continuous service, no combination of ambient temperature and conductor current produces a stabilized conductor temperature in excess

11、of 200 “C. The wires are suitable for fixed wiring at temperatures down to - 75 “C but are not suitable for severe flexing below - 50 “C. These wires do not support combustion but they should not be regarded as complying with the requirements of IS0 . . .I) in regard to fire resistance. This Interna

12、tional Standard includes the requirements for wires with copper conductors, including those with an outer covering in the form of a metal braid. 2 TERMINOLOGY 2.1 conductor : Conducting portion of an equipment wire. 2.2 wire : Cylindrical metallic wire of uniform cross-sectional area, used to form t

13、he conductor or braid. 2.3 stranded conductor : Conductor composed of a number of wires twisted together. When the conductor consists of more than one layer, alternate layers are twisted in opposite directions. 2.4 bunched conductor : Conductor composed of a number of wires in which all wires are tw

14、isted together in the same direction. 2.5 insulation : Part of an equipment wire which serves to insulate the conductor. 2.6 metal braid : A number of wires applied spirally over the insulation and interwoven to form a uniform and substantially continuous covering. 2.7 equipment wire : Complete asse

15、mbly of conductor, insulation and metallic braid if any. 2.8 sample : Amount of equipment wire of one and the same dimension and type, taken from a batch. 3 MATERIALS 3.1 Copper wires shall be of annealed high-conductivity copper having a resistivity not greater than the value fixed by the Internati

16、onal Electrotechnical Commission (IEC) for “Standard Annealed Copper”. Each wire shall be coated with silver or other suitable metal which will satisfy the requirements of the relevant national specification. 3.2 The tensile strength and elongation of wires taken from conductors shall conform to the

17、 appropriate values shown in Table 1 which are based on a gauge length of 254 mm (IO in) held in clamps separated at a rate exceeding 127 mm (5 in) per minute, the tensile strength being calculated on the original cross-sectional area of the wire. TABLE 1 Diameter Maximum tensile strength Minimum el

18、ongation mm in MPa* Ibf/in* % 0.08 to 0,125 0.003 15 to 0.004 92 325 47 000 5.5 0,15 to 0,20 0.005 9 to 0.007 87 303 44 000 9.0 0.25 to 0.45 0.009 84 to 0.017 7 296 43000 13.5 0.60 to 0.90 0.023 6 to 0.035 4 290 42 000 18.0 * 1 MPa 1 MN/m*. = 3.3 The material used for the insulation shall be polytet

19、rafluoroethylene or other material giving an equivalent performance. It shall be applied in such a way that the equipment wire meets all the requirements of this International Standard. 1) In preparation. 1 Copyright International Organization for Standardization Provided by IHS under license with I

20、SO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:34:31 MDTNo reproduction or networking permitted without license from IHS -,-,- -. I. -. _ _ _ _ _ _ . _ IS0 2032-1973 (E) 4 CONSTRUCTION 4.1 Conductor 4.1.1 The conductor shall consist of a number of wires bunched or st

21、randed. The wires shall be annealed copper coated with silver or other suitable metal as specified in 3.1. 4.1.2 The complete conductor shall not be joined. Individual wires may be joined, preferably by brazing or soldering, but no joint shall be within 300 mm (12 in) of any other joint in the same

22、layer. 4.2 Complete equipment wire 4.2.1 The insulation shall be of uniform circular cross-section throughout the length of the equipment wire and the conductor shall be evenly centred in the insulation. 4.2.2 The insulation shall not be loose but it shall be possible to strip the complete insulatio

23、n, leaving the conductor in a condition sufficiently clean to permit satisfactory connections being made to terminations without further cleaning. 4.2.3 When specified by the purchaser, the equipment wire shall be coded for circuit identification by colouring, printing or other suitable method. 4.2.

24、4 When specified by the purchaser, the equipment wire shall bear means of identification in accordance with section 11. 4.3 Metal-braided equipment wire 4.3.1 Annealed copper wire coated with silver or other suitable metal and complying with the requirements of 3.1 shall be used to form the overall

25、outer cover of metal-braided equipment wires. 4.3.2 The metal braids shall be close fitting but wherever the equipment wire is cut it shall be possible to slide the metal braid back by hand a distance of 100 mm (4 in) in a length of 600 mm (24 in), one end of the equipment wire being clamped. The br

26、aid shall subsequently be capable of being returned to within 12,5 mm (0.5 in) of its original position. 4.3.3 Where breaks in the individual wires occur, the ends shall be brazed, hard soldered or tucked out of the braid and there shall not ba more than one such break in any 25 mm (1 in) length of

27、equipment wire. 4.3.4 When renewal of the spindles is necessary, the ends shall be tucked out of the braid and there shalt not be more than one spindle renewal in any 300 mm (12 in) length of equipment wire. 4.3.5 There shall be no joints in the complete braid, 4.3.6 The metal braid shall not increa

28、se the maximum diameters of the specified type of equipment wire by more than 0,76 mm (0.030 in). 5 DlMENSlONS AND CONDUCTOR RESISTANCE The dimensions and conductor resistance of the finished equipment wires shall comply with Tables 2 and 3. 6 RESISTANCE TO ADVERSE ENVIRONMENTAL CONDITIONS The finis

29、hed equipment wires shall be suitable for fixed wiring at temperatures down to - 75 C. They shall be non-hygroscopic and resistant to fluids likely to the encountered on aircraft; they shall not support mould growth. All colours shall be fast to light and moisture, even after storage for long period

30、s in the tropics. 7 TESTS 7.1 The tests listed below shall be in accordance with the relevant national standard for equipment wires for aircraft suitable for operation at stabilized conductor temperatures up to 200 Oc. 7.2 Preferred methods of test are stated in IS0 2436. Evidence shall be available

31、 to the purchaser that the equipment wire covered by the present International Standard has satisfactorily passed type tests conducted in accordance with sections 8, 9 and 10. It is not necessarily intended that a type test shall be made on every size of equipment wire. The national standard may, su

32、bject to the agreement of the national airworthiness authority, permit the division of the range of sizes into groups, tests on one sample being accepted as representative of all the equipment wires in the group. 7.3 in order that a consistent standard of quality be maintained, the manufacturer shal

33、l conc(uct production routine tests (see section 9) and production quality tests (see section 10). 8 TYPE TESTS ONLY Samples of equipment wire shall have passed the tests listed in sections 9 and 10 before submission to the following type tests : 1) ageing in air at high temperature, followed by an

34、insulation test while immersed iriwater; 2) ageing in air at high temperature, followed by an insulation test at the ageing temperature; 3) bend test ?t low temperature; 4) flammability test. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NAS

35、A Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:34:31 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 2032-1973 (E) TABLE 2 - Unscreened equipment wire Maximum resistance of finished equipment wireat2O”C Nominal diameter of conductor Maximum diameter ov

36、er insulation Nominal area of conductor Size No. Minimum number of wires in* 0,000 054 6 32 7 0.000 085 3 30 7 0.000 133 28 7 0.000 192 26 7 0.000 341 24 7 0.000 521 22 7 0.000 925 20 7 0.00145 18 7 0.002 08 16 19 0.002 61 14 19 0,004 68 12 19 0.007 21 10 37 T T Type A Type C mm in mm 521.3 0.24 0.0

37、09 5 334.0 0,30 0.012 204.2 0.38 0.015 141.8 0.45 0.018 79.74 0.60 0.024 52.22 0.75 0.030 29.39 1 ,oo 0.039 18.81 1.25 0.049 13.06 1,50 0.059 0,59 0.023 0.65 0.026 0.73 0.029 0.80 0.032 0,95 0.037 1.10 0.043 1.35 0.053 - - - - 10.18 1.68 0.066 - 5.64 2,25 0.089 - 3.66 2,80 0.110 - mm in mm in 0.84 0

38、.033 1.16 0.046 0.90 0.035 1.22 0.048 0.98 0.039 1.30 0.051 1.05 1.20 1.35 0.041 0.047 0 053 0.063 0.073 0.083 1.37 0.054 1.52 0.060 1.67 0.066 1.60 1.85 2.10 1,92 0.076 2.17 0.085 2.46 0.097 2.28 0.090 2.74 0.108 2.85 0.112 3,31 0.130 3.40 0.134 3,86 0.152 in - - TABLE 3 - Screened equipment wires

39、Maximum resistance of finished equipment wire at 20 “C Nominal diameter of conductor Size No. Maximum diameter over insulation I Nominal area of conductor Minimum number of wires TypecI T T Type A Type B mm in 0,59 0.023 0,65 0 026 0.73 0.029 0.80 0.032 0,95 0.037 1.10 0.043 1,35 0.053 - - - - - - -

40、 - - - mm 0.84 0.90 0.98 1.05 1.20 1.35 1.60 1 ,B5 2.10 2.28 2.85 3.40 Wkm I 570.7 365.3 223,3 155.1 87.2 i 57.1 32.14 20.57 14.28 11.13 6.17 4,Ol l- mm* in* 0,035 2 0,000 054 6 32 7 0,055 0 0.000 085 3 30 7 0,085 9 0.000 133 28 7 0,124 0.000 192 26 7 0,220 0.000 341 24 7 0,336 0.000 521 22 7 0,597

41、o.ooo 925 20 7 0,933 0.001 45 18 7 1.34 0.002 08 16 19 1.68 3.02 4.65 A 0.002 61 14 19 0,004 68 12 19 0.007 21 IO 37 in mm 0.033 0.035 0 039 0.041 0.047 0.053 1.16 1,22 1.30 1.37 1.52 1,67 0.063 1.92 0.073 2,lJ 0.083 2.46 0.090 2.74 0.112 3.31 0.134 3.86 2/l 000 yd mm in 521.3 0.24 0.009 5 334 0 0.3

42、0 0.012 204.2 0.38 0.015 141.8 0.45 0.018 79.74 0,60 0.024 52.22 0.75 0.030 29.39 1 ,oo 0.039 18.81 1.25 0.049 13.06 1.50 0.059 10.18 1,68 0.066 5.64 2.25 0.089 3.66 2.80 0.110 F f Diameter of metal braiding wires Maximum diameter over metal braid Type A T Type B T TYW C Type A r Type B i Type C Siz

43、e No. mm in mm in 1.34 1.40 1.48 1.55 1 ,JO 1.85 0.053 I,66 0.066 0.065 1 .J2 0.068 0.059 1.80 0.071 0.061 1.87 0.074 0.067 2.02 0.080 0.073 2,lJ 0.086 2.10 0.083 2.42 0.096 2,35 0.093 2.67 0,105 2.60 0.103 2.96 0.117 2.78 0.110 3.24 0.128 3.35 0.132 3.91 0.154 4.00 0.158 4.46 0.176 in mna in 0.003

44、9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0,99 1.05 1.13 1.20 1.45 1.60 1.85 - - 0.039 0.042 0.045 0.048 0.067 0.063 0.073 - 0.003 9 - - 0.004 7 - - 0.004 7 - - in 0.003 9 0.003 9 0 003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.003 9 0.004 7 in 0.003 2 0.003

45、 2 0.003 2 0.003 2 0.003 9 0.003 9 0.003 9 - - - - mm 0.10 0.10 0,lO 0,lO 0.10 0,lO 0.10 0,lO 0.10 0.10 0.10 0.12 mm 0,lO 0.10 0,lO 0,lO 0.10 0,lO 0.10 0,lO 0.10 0.10 0,12 0.12 mm 0,08 or3 608 0.08 0.10 0.10 0.10 - - - - 32 30 28 26 24 22 20 18 16 14 12 10 3 Copyright International Organization for

46、Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:34:31 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 2032-1973 (E) 9 TYPE AND PRODUCTION ROUTINE TESTS Each length of equipment wire prod

47、uced shall be submitted to the following tests : 1) conductor resistance tests; 2) spark test in the dry state (except metal-braided equipment wires). The spark test shall be made by means of a suitable chain-electrode device that will subject the insulation to an impressed a.c. voltage not Jess tha

48、n the value shown in Table 4; 3) voltage test (metal-braided equipment wires). The voltage specified in Table 4 at a frequency of 25 to 100 Hz shall be applied for 1 min between conductor and braid in the dry state. TABLE 4 1 equzrre 1 SK 1 “zr / 10 TYPE AND PRODUCTION QUALITY TESTS 10.1 The followi

49、ng tests shall be made periodically during the manufacture of a batch of equipment wire in order to establish that certain important physical qualities are being maintained. It is recommended that such tests be made on each 100 000 m of equipment wire or at least once during each period of 2 months production, whichever is the less. 10.2 Two samples taken at random, one sample being of the