1、 INCH-POUND MIL-DTL-24643/36F 1 October 2009 SUPERSEDING MIL-DTL-24643/36E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS3SWU (INCLUDING VARIATION LS3SWUS) This specification is approved for use by all Departments and Agencies of the Department of Defense. The r
2、equirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. This cable can be manufactured in two variations: LS3SWU and LS3SWUS (double overall shield). Construction, Watertight First - Copper conductor, coated or uncoated, 18 AWG size, Class
3、B stranding (7 by 0.0152 inches). Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - Thermoset insulation. Nominal wall thickness of 0.023 inch; wall thickness may vary from nominal as necessary, in order for the completed cable to mee
4、t the specified electrical requirements. Colored insulation, one white, one black, and one red conductor for each triad. Fourth - Three conductors (one black, one white, and one red) cabled together with a nominal lay of 3.5 inches to form a triad. Fifth - An optional binder. Sixth - Braided shield
5、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. An alternate shield insulation may consist of one polyester tape, plus an extruded jacket of a suitable transparent material, mi
6、nimum average thickness of the transparent material 0.003 inch. The standard identification code shall be applied by Method 2. Eighth - The specified number of triads (see table I) shall be cabled together in accordance with 3.4.4 of MIL-DTL-24643. Cabling sequence shall be consecutive starting with
7、 no. 1 from the center outward. Fillers may be used as necessary to form a firm well-rounded assembly. Ninth - An optional binder. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/36F Construction, Variant for Type LS3S
8、WU Tenth - Cross-linked polyolefin jacket (see table I for thickness). Construction, Variant for Type LS3SWUS Tenth - Braided shield of tin-coated copper with a minimum coverage of 85 percent. Eleventh - Spirally-wrapped 0.002-inch thick polyethylene terephthalate (polyester film) separator tape wit
9、h 25 percent minimum overlap. Twelfth - Braided shield of tin-coated copper with a minimum coverage of 85 percent. Thirteenth - An optional binder. Fourteenth - Cross-linked polyolefin jacket (see table I for thickness). TABLE I. Details. Overall diameter Military part no. M24643/36 Type and size Nu
10、mber of triads Cable jacket thickness min. avg. (inch) min. (inch) max. (inch) -01UN LS3SWU-3 3 0.040 0.610 0.655 -01UD LS3SWUS-3 3 0.040 0.675 0.710 -02UN LS3SWU-7 7 0.040 0.880 0.940 -02UD LS3SWUS-7 7 0.040 0.940 1.000 -03UN LS3SWU-10 10 0.050 1.100 1.180 -03UD LS3SWUS-10 10 0.050 1.160 1.240 -04U
11、N LS3SWU-14 14 0.050 1.200 1.280 -04UD LS3SWUS-14 14 0.050 1.260 1.340 -05UN LS3SWU-19 19 0.050 1.370 1.450 -05UD LS3SWUS-19 19 0.050 1.430 1.510 -06UN LS3SWU-24 24 0.050 1.640 1.760 -06UD LS3SWUS-24 24 0.050 1.700 1.820 -07UN LS3SWU-30 30 0.050 1.760 1.860 -07UD LS3SWUS-30 30 0.050 1.820 1.920 -08U
12、N LS3SWU-37 37 0.060 1.890 1.940 -08UD LS3SWUS-37 37 0.060 1.950 2.050 -09UN LS3SWU-44 44 0.060 2.140 2.240 -09UD LS3SWUS-44 44 0.060 2.200 2.300 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 7.06 2 Provided by IHSNot for Res
13、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/36F Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to shield 1000 Component shield to component shield 500 Overall shield to overall shield (Type LS3SWUS only) 200 Insulatio
14、n resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor to shield 500 Component shield to component shield 100 Overall shield to overall shield (Type LS3SWUS only) 100 Conductor continuity No failure Shield continuity No failure Jacket flaws (Type LS3SWUS only) No failure Group A
15、: Visual and dimensional No failure Hydrostatic (open end) (leakage at 300 lb/in2, 2 hours, in3, max.) 1.0 Capacitance Mutual capacitance, 1 kilohertz (KHz) (pF/ft, max.) 30 Capacitance unbalanced (percent max.) 10 Group B: Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 20
16、0 C) 50 Drip (951 C) Zero Physicals (unaged) Insulation (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percent, min.) 150 Jacket (cable) Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Tear (lb/in thickness, min.) 35 3 Provided by IHSNot for ResaleNo reproduction or n
17、etworking permitted without license from IHS-,-,-MIL-DTL-24643/36F Group C: Physicals (aged) air oven Insulation (extruded) Tensile strength (percent of unaged, min.) 75 Elongation (percent of unaged, min.) 75 Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged
18、, min.) 60 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable sealant removability No failure Shrinkage No failure Shield (conformance to material, construction and coverage) No failure Surface transfer impedance (Type LS3SWUS only) Milliohms per me
19、ter (max.) 700 EMP response (dB, min.) 60 Group D: Flame propagation (cable) No failure Qualification Inspection: 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) (scr
20、apes, min.) 75 Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18Shield insulation 2 Halogen content (percent, max.) Jacket 0.2 Fillers 0.2Insulation 0.2Immersion (jacket) Tensile strength (percent of unaged, min.) 50 4 Provided by IHSNot for ResaleNo reproduction or networking per
21、mitted without license from IHS-,-,-MIL-DTL-24643/36F 5 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45 Insulation 45Toxicity index (max.) Jacket 5 Fillers 5Insulation 1.5 Durometer (jacket) - Type A (hardness, min.) 80 Weathering (jacket) No failure Electrical moistu
22、re absorption No failure UNIT ORDERING LENGTHS: Types Sizes Feet (nominal) LS3SWU and LS3SWUS 3 through 19 1500 LS3SWU and LS3SWUS 24 through 44 500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent
23、of the changes. Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-040) Review Activities: Army AR, AV, CR 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-,-,-
