1、 INCH-POUND MIL-DTL-24643/47D 1 October 2009 SUPERSEDING MIL-DTL-24643/47C 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS1SMWU This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the
2、 product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, 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 - The
3、rmoset insulation. Nominal wall thickness of 0.030 inch: wall thickness may vary from nominal as necessary, in order for the completed cable to meet the specified electrical requirements. Fourth - Braided shield of 34 or 36 AWG tin-coated copper. Braid angle of 30 to 35 degrees; minimum coverage of
4、85 percent. 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 c
5、ode shall be applied by Method 2. Sixth - The specified number of shielded singles (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 for
6、m a firm well-rounded assembly. Seventh - An optional binder. Eighth - Cross-linked polyolefin jacket. Minimum average wall thickness of 0.050 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/47D TABLE I. Details.
7、 Overall diameter Military part no. M24643/47 Type and size Number of shielded singles Min. (inch) Max. (inch) -01UN LS1SMWU-70 70 1.465 1.555 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 17.71 Voltage withstand (volts, root
8、 mean square, min.) Conductor to shield 5000 Component shield to component 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 failu
9、re Capacitance (mutual), at1 kilohertz (KHz) (pF/ft, max.) 35 Watertightness (see MIL-DTL-24643 for limits of water leakage) No failure Group B: Cold bending cable No failure Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Drip (951C) ZeroPhysicals (unaged) Insula
10、tion (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percent, min.) 150 Jacket (cable) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/47D Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Tear (lb/in thic
11、kness, min.) 35 Attenuation, at 400 megahertz (MHz) (decibel (db)/100 ft max.) 18.0 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 (
12、percent of unaged, min.) 60 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable fill (sealant) removability No failure Shrinkage No failure Shield (conformance to material, construction and coverage) No failure Group D: Flame propagation (cable) No f
13、ailure 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 (percent, max.) Jacket 2 Fillers 2 Insulation
14、18Shield insulation 2 Halogen content (percent, max.) Jacket 0.2 Fillers 0.2Insulation 0.2Immersion (jacket) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/47D 4 Tensile strength (percent of unaged, min.) 50 Elongation (percent of un
15、aged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insulation 45 Toxicity index (max.) Jacket 5 Fillers 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) LS1SM
16、WU-70 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 6145-2008-051) Review Activities: Army AR, AV, CR Navy CG
17、 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-,-,-
