1、 INCH-POUND MIL-DTL-24643/45F 1 October 2009 SUPERSEDING MIL-DTL-24643/45E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS2U This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the pr
2、oduct described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, tin-coated, ASTM B286, 26 AWG 7 strands. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - Ther
3、moset insulation. Nominal wall thickness of 0.015 inch: wall thickness may vary from nominal as necessary, in order for completed cable to meet the specified electrical requirements. Telephone identification code shall be applied by Method 3. Fourth - Two conductors cabled together with a maximum la
4、y of 1 inches to form a pair. Fifth - The specified number of pairs (see table I) shall be cabled together with a lay 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-r
5、ounded assembly. Sixth - An optional binder. Seventh - Braided shield of tin-coated copper. Eighth - An optional binder. Ninth - Cross-linked polyolefin jacket (see table I for thickness). AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
6、MIL-DTL-24643/45F TABLE I. Details. Overall diameter Military part no. M24643/45 Type and size No. of pairs Cable jacket thickness min. avg. (inch) min. (inch) max. (inch) -01UN LS2U-10 10 0.050 0.450 0.480 -02UN LS2U-15 15 0.050 0.530 0.560 -03UN LS2U-19 19 0.050 0.550 0.580 -04UN LS2U-30 30 0
7、050 0.670 0.700 -05UN LS2U-45 45 0.050 0.830 0.870 -06UN LS2U-60 60 0.065 0.920 0.960 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 45.19 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conducto
8、r to shield 1000 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor to shield 500 Conductor continuity No failure Shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Characteristic impedance, at 1 megahertz (MHz) (ohms) 13
9、515 Group B: Cold bending cable No failure Thermoset proof test (percent, max.) Insulation 50Jacket (when tested at 200 C) 50 Bending endurance, At 252 C (cycles, min.) 25 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/45F Physicals
10、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 (pounds per inch thickness, min.) 35 Group C: Physicals (aged) air oven Insulation (extruded) Tensile strength (pe
11、rcent of unaged, 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 (conforma
12、nce to material, construction and coverage) No failure Surface transfer impedance (Type LS only) Milliohms per meter (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,
13、 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 183 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-
14、DTL-24643/45F 4 Shield 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 Smoke index (max.) Jacket 25 Fillers 45Insulation 45 Toxicity index (max.) Jacket 5 Fillers
15、 5Insulation 1.5Durometer (jacket) - Type A (hardness, min.) 80 Weathering (jacket) No failure Electrical moisture absorption No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) LS2U all sizes 1000 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify c
16、hanges with respect to the previous issue due to the extent of the changes. Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-049) 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-,-,-
