1、 INCH-POUND MIL-DTL-24643/27F 1 October 2009 SUPERSEDING MIL-DTL-24643/27E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 600 VOLTS, TYPE LS2AU (INCLUDING VARIATION LS2AUS) This specification is approved for use by all Departments and Agencies of the Department of Defen
2、se. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. This cable can be manufactured in two variations: LS2AU and LS2AUS (double overall shield). Construction, Non-Watertight First - Copper conductor, tin-coated, ASTM B286, Size
3、22 7strands. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - Thermoset insulation. Minimum average wall thickness of 0.024 inch; telephone identification applied by Method 3. Fourth - Two conductors cabled together with a lay not gr
4、eater than 1 inches. Fifth - Forty two pairs cabled with a lay in accordance with 3.4.4 of MIL-DTL-24643. Fillers may be used as necessary to form a firm well-rounded assembly. Cabling sequence shall be consecutive, starting with no. 1. in the center outward. Sixth - An optional binder. Seventh - Br
5、aided shield of tin-coated copper. Minimum coverage of 85 percent. Construction, Variant for Type LS2AU Eighth - An optional binder. Ninth - Cross-linked polyolefin jacket. Minimum average wall thickness 0.060 inch. Construction, Variant for Type LS2AUS Eighth - Spirally wrapped 0.002-inch thick pol
6、yethylene (polyester film) separator tape with 25 percent minimum lap. Ninth - Braided shield of tin-coated copper. Minimum coverage of 85 percent. Tenth - An optional binder. Eleventh - Cross-linked polyolefin jacket. Minimum average wall thickness 0.060 inch. AMSC N/A FSC 6145 Provided by IHSNot f
7、or ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/27F TABLE I. Details. Overall diameter Military part no. M24643/27 Type and size Number of pairs Diameter over shielded core nom. (inch) min. (inch) max. (inch) -01UO LS2AU-40 40 1.089 1.320 1.370 -01UD LS2AU
8、S-40 40 1.120 1.380 1.430 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 17.71 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2500 Overall shield to overall shield (Type LS2AUS only) 200 Insulation re
9、sistance (megohms/1000 feet, min.) Conductor to conductor 5000 Overall shield to overall shield (Type LS2AUS only) 100 Conductor continuity No failure Shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Capacitance, at 1 megahertz (MHz) (pf/ft max.) Mutual
10、 capacitance 20 Group B: Cold bending cable at 02 C, (16-inch mandrel diameter) No failure Thermoset 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 2 Provided by IHS
11、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/27F Jacket (cable) Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Tear (lb/in thickness, min.) 35 Group C: Physicals (aged) air oven Insulation (extruded) Tensile strength (percent o
12、f 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 (conformance to
13、material, construction and coverage) No failure Surface transfer impedance (Type LS2AUS 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, an
14、d 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 18Shield insulation 2 Halogen content (percent, max.) Jacket 0.2 Fillers 0.23 Provided by IHSNot for ResaleNo
15、 reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/27F 4 Insulation 0.2 Immersion (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 5
16、Insulation 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) LS2AU amd LS2AUS 1000 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify c
17、hanges with respect to the previous issue due to the extent of the changes. Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-031) 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-,-,-
