1、 INCH-POUND MIL-DTL-24643/35D 1 October 2009 SUPERSEDING MIL-DTL-24643/35C 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO + 90 C, TYPE LS3SU (INCLUDING VARIATION LS3SUS) This specification is approved for use by all Departments and Agencies of the Department of Defense. The re
2、quirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. This cable can be manufactured in two variations: LS3SU and LS3SUS (double overall shield). Construction, Non-Watertight First - Copper conductor, coated or uncoated, 18 AWG (7 by 0.015
3、2 inches). Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - 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 electri
4、cal requirements. Colored insulation, one white, one black, and one red conductor to form each triad. Fourth - Three conductors (one black, one white, and one red) cabled together with a nominal lay of 3.5 inches to form each triad. Fifth - An optional binder. Sixth - Braided shield of 34 or 36 AWG,
5、 coated or uncoated 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, minimum av
6、erage 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 no. 1 f
7、rom 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-24643/35D Construction, Variant Type LS3SU Tenth - Cr
8、oss-linked polyolefin jacket (see table I for thickness). Construction, Variant Type LS3SUS Tenth - Braided shield of tin-coated copper with minimum coverage of 85 percent. Eleventh - Spirally-wrapped polyethylene terephthalate (polyester film) separator tape with a 25 percent minimum overlap. Twelf
9、th - Braided shield of tin-coated copper with minimum coverage of 85 percent. Thirteenth - An optional binder. Fourteenth - Cross-linked polyolefin jacket (see table II for thickness). TABLE I. Details (unshieled). Overall diameter Military part no. M24643/36 Type and size Number of triads Cable jac
10、ket thickness min. avg. (inch) min. (inch) max. (inch) -01UN LS3SU-3 3 0.040 0.650 0.700 -02UN LS3SU-7 7 0.050 0.840 0.910 -03UN LS3SU-10 10 0.050 1.100 1.190 -04UN LS3SU-14 14 0.050 1.200 1.290 -05UN LS3SU-19 19 0.050 1.340 1.430 -06UN LS3SU-24 24 0.060 1.580 1.670 -07UN LS3SU-30 30 0.060 1.680 1.7
11、70 -08UN LS3SU-37 37 0.060 1.840 1.930 -09UN LS3SU-44 44 0.060 2.060 2.150 TABLE II. Details (shielded). Overall diameter Military part no. M24643/36 Type and size Number of triads Cable jacket thickness min. avg. (inch) min (inch) max (inch) -01UD LS3SUS-3 3 0.040 0.710 0.760 -02UD LS3SUS-7 7 0.050
12、 0.900 0.970 -03UD LS3SUS-10 10 0.050 1.160 1.250 -04UD LS3SUS-14 14 0.050 1.260 1.350 -05UD LS3SUS-19 19 0.050 1.400 1.490 -06UD LS3SUS-24 24 0.060 1.640 1.730 -07UD LS3SUS-30 30 0.060 1.740 1.830 -08UD LS3SUS-37 37 0.060 1.900 1.990 -09UD LS3SUS-44 44 0.060 2.120 2.210 2 Provided by IHSNot for Res
13、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/35D REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 7.06 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conduc
14、tor to shield 1000 Component shield to all other shields 500 Overall shield to overall shield (Type LS3SUS only) 200 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor to shield 500 Component shield to all other shields 100 Overall shield to overall shield (Type LS3
15、SUS only) 100 Conductor continuity No failure Shield continuity No failure Jacket flaws (Type LS3SUS only) No failure Group A: Visual and dimensional No failure Capacitance Mutual capacitance, at 1 kilohertz (KHz) (pF/ft, max.) 30 Capacitance unbalance (percent max.) 10 Group B: Thermoset proof test
16、 (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Physicals (unaged) Insulation (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percent, min.) 150 Jacket (cable) Tensile strength (lb/in2, min.) 1300 3 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
17、ut license from IHS-,-,-MIL-DTL-24643/35D Elongation (percent, min.) 160 Tear (lb/in thickness, min.) 35 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,
18、min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Shrinkage No failure Shield (conformance to material, construction and coverage) No failure Surface transfer impedance (Type LS3SUS only) Milliohms per met
19、er (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) (scra
20、pes, 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) 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-246
21、43/35D 5 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) - Type A (hardness, min.) 80 Weathering (jacket) No failure Electrical moisture
22、 absorption No failure UNIT ORDERING LENGTHS: Types Sizes Feet (nominal) LS3SU and LS3SUS 3 through 19 1000 LS3SU and LS3SUS 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 of the
23、 changes. Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-039) 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-,-,-
