1、 INCH-POUND MIL-DTL-24643/32F 1 October 2009 SUPERSEDING MIL-DTL-24643/32E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS2SWAU This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the
2、 product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Watertight First - Copper conductor, coated or uncoated, ASTM B286, 22 AWG 7 strands. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third
3、 - Thermoset insulation. Nominal wall thickness of 0.013 inch; wall thickness may vary from nominal as necessary, in order for the completed cable to meet the specified electrical requirements. Colored insulation, one white and one black conductor for each pair. Fourth - Two conductors (one black an
4、d one white) cabled together with a nominal lay of 2.5 inches to form a pair. Fifth - An optional binder. Sixth - Braided shield of 34 or 36 AWG, tin-coated copper. Braid angle of 30 to 35 degrees; minimum coverage of 85 percent. Seventh - Shield insulation of two polyester tapes, outer tape sealed.
5、 An alternate shield insulation may consist of one polyester tape, plus an extruded jacket of a suitable transparent material, minimum average thickness of the transparent material 0.003 inch. The standard identification code shall be applied by Method 2. Eighth - The specified number of pairs (see
6、table I) shall be cabled together in accordance with 3.4.4 of MIL-DTL-24643. Cabling sequence shall be consecutive starting with no. 1 from the center outward. Fillers may be used as necessary to form a firm well-rounded assembly. Ninth - An optional binder. Tenth - Cross-linked polyolefin jacket (s
7、ee table I for thickness). AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/32F TABLE I. Details. Overall diameter Military part no. M24643/32 Type and size Number of pairs Cable jacket thickness min avg. (inch) min. (i
8、nch) max. (inch) -01UN LS2SWAU-3 3 0.050 0.480 0.520 -02UN LS2SWAU-7 7 0.050 0.610 0.660 -03UN LS2SWAU-10 10 0.050 0.770 0.830 -04UN LS2SWAU-14 14 0.063 0.860 0.930 -05UN LS2SWAU-19 19 0.063 0.970 1.040 -06UN LS2SWAU-24 24 0.063 1.120 1.210 -07UN LS2SWAU-30 30 0.063 1.190 1.280 -08UN LS2SWAU-37 37 0
9、.063 1.290 1.380 -09UN LS2SWAU-44 44 0.063 1.460 1.550 -10UN LS2SWAU-61 61 0.075 1.660 1.740 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 17.37 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Co
10、nductor to shield 1000 Component shield to component shield 500 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor to shield 500 Component shield to component shield 100 Conductor continuity No failure Shield continuity No failure Group A: Visual and dimensional No
11、failure Hydrostatic (open end) (leakage at 300 lb/in2, 2 hours, in3, max.) 1.0 Capacitance Mutual capacitance, at 1 kilohertz (KHz) (pF/ft, max.) 30 Capacitance unbalance (percent max.) 8 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2464
12、3/32F Characteristic impedance, at 1 megahertz (MHz) (ohms) 755 Group B: Cold bending cable No failure Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Drip (951 C) Zero Physicals (unaged) Insulation (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percen
13、t, min.) 150 Jacket (cable) Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Tear (pounds per inch thickness, min.) 35 Attenuation, at 3 MHz (decibel (db)/100 ft max.) 3.0 Group C: Physicals (aged) air oven Insulation (extruded) Tensile strength (percent of unaged, min.) 75 Elonga
14、tion (percent of unaged, min.) 75 Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable fill (sealant) removability No failure Shrinkage No failure Shi
15、eld (conformance to material, construction and coverage) No failure Pulse response time (nanoseconds/500 ft, max.) 400 Group D: Flame propagation (cable) No failure 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/32F Qualification Ins
16、pection: Qualification inspection shall include basic electricals; groups A, B, C, and D; plus the following: Aging and compatibility (cable) (1255 C) No failure Abrasion resistance (jacket) (scrapes, min.) 75 Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18Shield insulation 2 Ha
17、logen content (percent, max.) Jacket 0.2 Fillers 0.2Insulation 0.2Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insulation 45 Toxicity index (max.) Jacket 5 Fillers 5Insulation 1.5Durometer (jacket) - T
18、ype A (hardness, min.) 80 Weathering (jacket) No failure Electrical moisture absorption No failure UNIT ORDERING LENGTHS: Type Size Feet (nominal) LS2SWAU 3 through 30 1000 LS2SWAU 37 through 61 500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify changes wit
19、h respect to the previous issue due to the extent of the changes. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/32F 5 Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-036) Review Activities: Army AR, AV, CR
20、 Navy CG, EC DLA CC NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
