1、 INCH-POUND MIL-DTL-24643/55F 1 October 2009 SUPERSEDING MIL-DTL-24643/55E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LS4NW 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, coated or uncoated 8 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 0.045-inch minimum average thickness. Standard identification code shall be applied by Method 1 or Method 3. If Method 1 is used, the insulation color shall be black. Fourth - Four conductors cabled together with a lay in accordance with 3.4.4 of MIL-DTL-24643. Fi
4、llers may be used as necessary to form a firm well-rounded assembly. Fifth - An optional binder. Sixth - Cross-linked polyolefin jacket. Minimum average wall thickness of 0.050 inch. Maximum overall cable diameter 0.740 inch. NOTE: LS4NW-8 military part number M24643/55-01UN. AMSC N/A FSC 6145 Provi
5、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/55F REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 0.679 Voltage withstand (volts, root mean square, min.) Conductor to
6、 conductor 4500 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 4200 Conductor continuity No failure Group A: Visual and dimensional No failure Group B: Cold bending cable No failure Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Physicals
7、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 Group C: Physicals (aged) air oven Insulation (extruded) Tensile strength (percent of u
8、naged, min.) 75 Elongation (percent of unaged, min.) 75 Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/55F Permanence of printing (c
9、onductor), Method 1 only (cycles, min.) 25 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Shrinkage No failure Group D: Flame propagation (cable) No failure Qualification Inspection: Qualification inspection shall include basic electricals; groups A,
10、B, C, and D; plus the following: Cold Working (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 18Halogen content (percent, max.) Jacket 0.2 Fillers 0.2Insulati
11、on 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 5Insulation 1.5Durometer (jacket) - Type A (hardness, min.) 80 Weathering (jacket) No failure El
12、ectrical moisture absorption No FAILURE 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/55F 4 UNIT ORDERING LENGTHS: Type and size Feet (nominal) LS4NW-8 1500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revisi
13、on 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 6145-2008-059) 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-,-,-
