1、 INCH-POUND MIL-DTL-24643/56F 1 October 2009 SUPERSEDING MIL-DTL-24643/56E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS2SWL 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, coated or uncoated 16 AWG, Class B stranding, ASTM B8. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation.
3、Third - Thermoset insulation with nominal wall thickness 0.019 inch; wall thickness may vary from nominal as necessary, in order for completed cable to meet the specified electrical requirements. Colored insulation with one black and one white conductor for each pair. Fourth - Two conductors (one bl
4、ack and one white) cabled together with a nominal lay of 3 inches to form a pair. Fifth - An optional binder. Sixth - Braided shield of 34 or 36 AWG tin-coated copper. Braid angle of 30 to 35 degrees; minimum coverage of 85 percent. Seventh - Shield insulation of two polyester tapes, outer tape seal
5、ed. 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 code shall be applied by Method 2. Eighth - Seven shielded pairs cabled toget
6、her with a lay in accordance with 3.4.4 of MIL-DTL-24643. Cabling sequence shall be consecutive, starting with pair no. 1, from the center outward. Fillers may be used as necessary to make a firm, well-rounded assembly. Ninth - An optional binder. Tenth - Cross-linked polyolefin jacket. Minimum aver
7、age wall thickness of 0.075 inch. Overall cable diameter shall be 0.860 inch minimum, 0.910 inch maximum. NOTE: LS2SWL-7 military part number M24643/56-01UN. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/56F REQUIREM
8、ENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 4.66 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to shield 1000 Component shield to component shield 500 Insulation resistance (megohms/1000 fe
9、et, min.) Conductor to conductor 1000 Conductor to shield 500 Component shield to component shield 100 Conductor continuity No failure Shield continuity No failure Group A: Visual and dimensional No failure Capacitance Mutual capacitance, 1 kilohertz (KHz) (pF/ft, max.) 35 Capacitance unbalanced (pe
10、rcent max.) 10 Watertightness (see MIL-DTL-24643 for limits of water leakage) No failure Group B: Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Drip (951 C) Zero Physicals (unaged) Insulation (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percent, mi
11、n.) 150 Jacket (cable) Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/56F Tear (lb/in thickness, min.) 35 Group C: Physicals (aged) air oven Insulation (extruded) Te
12、nsile strength (percent 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 failur
13、e Cable fill (sealant) removability No failure 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: Cold Work
14、ing (minus 202 C) No damage 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 0.2Insulation 0.2Immersion (jacke
15、t) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/56F 4 Smoke index (max.) Jacket 25 Fillers 45 Insulation 45Toxicity index (max.) Jacket 5 Fillers
16、 5Insulation 1.5 Durometer (jacket) - Type A (hardness, min.) 80 Weathering (jacket) No failure Electrical moisture absorption No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) LS2SWL-7 1500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify change
17、s with respect to the previous issue due to the extent of the changes. Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-060) 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-,-,-
