1、 INCH-POUND MIL-DTL-24643/58F 1 October 2009 SUPERSEDING MIL-DTL-24643/58E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS2CS This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the p
2、roduct described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, tin-coated, 26 AWG, 7 strands, ASTM B286. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - Th
3、ermoset insulation nominal wall thickness 0.015 inch; wall thickness may vary from nominal as necessary, in order for completed cable to meet the specified electrical requirements. Standard identification code shall be applied by Method 6. Fourth - Two conductors (one black and one white) cabled tog
4、ether to form a pair in accordance with table I. All pairs to be left-hand lay. Fifth - The specified number of pairs (see table II) cabled together with a lay in accordance with table III. Cabling sequence shall be consecutive, starting with no. 1 from the center outward. Fillers may be used as nec
5、essary to form a firm, well-rounded assembly. Sixth - An optional binder. Seventh - Braided shield of tin-coated copper. Eighth - Spirally-wrapped polyethylene terephthalate (polyester film) separator tape. Ninth - Braided shield of tin-coated copper. Tenth - An optional binder. Eleventh - Cross-lin
6、ked polyolefin jacket (see table II for thickness). AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/58F TABLE I. Pair lay. 65 66 67 62, 68, 71, 74, 77 63, 69, 72, 75 61, 64, 70, 73, 76 53 54 55 45, 48, 51, 56, 59 43, 4
7、6, 49, 52, 56, 60 44, 47, 50, 58 27, 39 28, 40 29, 41 19, 22, 25, 30, 33, 36, 42, 20, 23, 26, 31, 34, 37 21, 24, 32, 35, 38 13 14 15 7, 10, 16 8, 11, 17 9, 12, 18 LS2CS-77 LS2CS-60 LS2CS-42 LS2CS-18 LS2CS-6 1 2 3 4 5 6 Pair number1.6 3.5 2.5 4.5 2.1 2.9 Cable type and size Length of lay (inches) TAB
8、LE II. Details. Overall diameter Military part no. M24643/58 Type and size Number of pairs Cable jacket thickness min. avg. (inch) min. (inch) max. (inch) -01UD LS2CS-6 6 0.063 0.400 0.430 -02UD LS2CS-18 18 0.063 0.550 0.590 -03UD LS2CS-42 42 0.063 0.750 0.800 -04UD LS2CS-60 60 0.082 0.880 0.930 -05
9、UD LS2CS-77 77 0.085 1.000 1.070 TABLE III. Cable lay. LS2CS-6 LS2CS-18 LS2CS-42 LS2CS-60 LS2CS-77 No. of pairs Lay (inches) No. of pairs Lay (inches) No. of pairs Lay (inches) No. of pairs Lay (inches) No. of pairs Lay (inches) Core 6 3.5 6 3.5 1 1.6 6 3.5 3 2.75 Layer 1 12 6.0 7 4.0 12 6.5 9 5.0 L
10、ayer 2 14 6.5 18 8.0 15 7.5 Layer 3 20 8.5 24 10.0 22 10.0 Layer 4 28 12.0 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/58F REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet a
11、t 25 C, max.) 42.17 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to overall shield 1000 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor to overall shield 500 Overall shield to overall shield 100 Conductor continuity No f
12、ailure Shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Characteristic impedance, at 1 megahertz (MHz) (ohms) 13515 Group B: Cold bending cable No failure Bending endurance At 25 C (cycles, min.) 25 Thermoset proof test (percent, max.) Insulation 50 Jac
13、ket (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 Tear (lb/in thickness, min.) 35 3 Provided by IHSNot for ResaleNo reproduction
14、or networking permitted without license from IHS-,-,-MIL-DTL-24643/58F 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 un
15、aged, 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 LS only) Milliohms per meter (max.) 700 EMP response (dB, min.)
16、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) (scrapes, min.) 75 Acid gas equivalent (per
17、cent, 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 4 Provided by IHSNot for ResaleNo reproduction or networking pe
18、rmitted without license from IHS-,-,-MIL-DTL-24643/58F 5 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 moisture absorption No failure UNIT ORDERING
19、LENGTHS: Type and size Feet (nominal) LS2CS all sizes 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 Navy SH Navy SH (Project 6145-2008
20、-064) 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-,-,-
