1、 INCH-POUND MIL-DTL-24643/39F 1 October 2009 SUPERSEDING MIL-DTL-24643/39E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS1S75MU This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring th
2、e product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, tin-coated, 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 0.070 inch; wall thickness may vary from nominal as necessary, in order for completed cable to meet the specified electrical requirements. Fourth - Braided shield of 34 AWG, tin-coated copper. Braid angle of 30 to 35 degrees; minimum coverage of 85 per
4、cent. Fifth - 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 average thickness of the transparent material 0.003 inch. The standard identification code s
5、hall be applied by Method 2. Sixth - The eight singles cabled around a center filler with a lay in accordance with 3.4.4 of MIL-DTL-24643. Cabling sequence shall be consecutive, starting with no. 1. Fillers may be used as necessary to make a firm, well-rounded assembly. Seventh - An optional binder.
6、 Eighth - Cross-linked polyolefin jacket. Minimum average wall thickness 0.050 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/39F TABLE I. Details. Overall diameter Military part no. M24643/39 Type and size Numb
7、er of conductors min. (inch) max. (inch) -01UN LS1S75MU-8 8 0.950 1.030 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 shield 7000 Component shield to compon
8、ent shield 500 Insulation resistance (megohms/1000 feet, min.) Conductor to shield 500 Component shield to component shield 100 Conductor continuity No failure Shield continuity No failure Group A: Visual and dimensional No failure Characteristic impedance, at 1 megahertz (MHz) (ohms) 753 Group B: T
9、hermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Attenuation, at 400 MHz (decibel (db)/100 ft max.) 9.0 Physicals (unaged) Insulation (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percent, min.) 150 Jacket (cable) Tensile strength (lb/in2, min.) 1300 El
10、ongation (percent, min.) 160 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/39F Tear (lb/in thickness, min.) 35 Cold bending cable No failure Group C: Physicals (aged) air oven Insulation (extruded) Tensile strength (percent of unage
11、d, min.) 75 Elongation (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 Shrinkage No failure Shield (conformance to materia
12、l, construction and coverage) No failure 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
13、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) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 3 Provided by IHSNot for
14、ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/39F 4 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 moistur
15、e absorption No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) LS1S75MU-8 1000 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 changes. Custodians: Preparing Activity: Army MI N
16、avy SH Navy SH (Project 6145-2008-043) 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-,-,-
