1、 INCH-POUND MIL-DTL-24643/34F 1 October 2009 SUPERSEDING MIL-DTL-24643/34E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 300 VOLTS, TYPE LSMS This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acqui
2、ring the product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, tin-coated, 16 AWG, Class B stranding (7 by 0.0192 inches), in accordance with ASTM B8 or ASTM B 286, 16 AWG with 19 strands. Second - Separator may b
3、e used at manufacturers option where required to provide free-stripping insulation. Third - Thermoset insulation (black). Minimum average wall thickness of 0.013 inch. Standard identification code applied by Method 1. Fourth - The specified number of singles (see table I) shall be cabled together in
4、 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. Fifth - An optional binder. Sixth - Braided shield of tin-coated copper. Seventh - An optional binder. Ei
5、ghth - Cross-linked polyolefin jacket. Minimum average wall thickness of 0.075 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/34F TABLE I. Details. Overall diameter Military part no. M24643/34 Type and size Numb
6、er of conductors min. (inch) max. (inch) -01UO LSMS-37 37 0.740 0.800 NOTE: Weight of completed cable shall not exceed 0.060 lb/ft. REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 5.1 Voltage withstand (volts, root mean square,
7、 min.) Conductor to conductor 2000 Conductor to shield 1000 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 2000 Conductor to shield 500 Conductor continuity No failure Shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Group B: The
8、rmoset proof test (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 Elongation (percent, min.) 160 2 Provided by IHSNot for Res
9、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/34F 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 (pe
10、rcent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing (insulation) (cycles, min.) 25 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Shrinkage No failure Surface transfer impedance (milliohms per meter, max.) 700 EMP
11、response (dB, min.) 60 Shield (conformance to material, 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) (
12、1255 C) No failure Abrasion resistance (jacket) (scrapes, min.) 75 Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18Halogen content (percent, max.) Jacket 0.2 Fillers 0.2Insulation 0.2 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged,
13、min.) 50 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/34F 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 (jac
14、ket) No failure Electrical moisture absorption No Failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) LSMS-37 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
15、: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-038) 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-,-,-
