1、 INCH-POUND MIL-DTL-24643/51F 1 October 2009 SUPERSEDING MIL-DTL-24643/51E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 1000 VOLTS, TYPE LSMNW This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acq
2、uiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, coated or uncoated 18 AWG, Class B stranding, in accordance with ASTM B8. Second - Separator may be used at manufacturers option where required to p
3、rovide free-stripping insulation. Third - Thermoset insulation 0.020 inch minimum average thickness. Standard identification code shall be applied by Method 1 or Method 3. If identification Method 1 is used, the insulation color shall be black. Fourth - The required number conductors (see table I),
4、cabled together with a lay in accordance with 3.4.4 of MIL-DTL-24643, except that the lay of the two outer layers for Size 44 shall not be greater than 18 times the pitch diameter of the layer. Cabling sequence shall be consecutive, starting with no. 1, from the center outwards. Fillers may be used
5、as necessary to form a firm well-rounded assembly. Fifth - An optional binder. Sixth - Cross-linked polyolefin jacket. Cable jacket thickness 0.050 inch minimum average. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/
6、51F TABLE I. Details. Overall diameter Military part no. M24643/51 Type and size Number of conductors min. (inch) max. (inch) -01UN LSMNW-7 7 0.370 0.400 -02UN LSMNW-10 10 0.457 0.495 -03UN LSMNW-14 14 0.494 0.535 -04UN LSMNW-19 19 0.545 0.590 -05UN LSMNW-24 24 0.633 0.685 -06UN LSMNW-30 30 0.670 0.
7、725 -07UN LSMNW-37 37 0.726 0.785 -08UN LSMNW-44 44 0.823 0.890 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 7.07 Voltage withstand (volts, root mean square, min.) Conductor to conductor 3000 Insulation resistance (megohms/1
8、000 feet, min.) Conductor to conductor 1000 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 (unaged) Insulation (extruded) Tensile strength
9、lb/in2, min.) 700 Elongation (percent, min.) 150 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/51F Jacket (cable) Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Tear (lb/in thickness, min.) 35 Group C: Physical
10、s (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 unaged, min.) 60 Permanence of printing (insulation), Method 1 only (cycles, min.) 25 Perm
11、anence 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, B, C, and D; plus the following: Aging and comp
12、atibility (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 0.2Insulation 0.2 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (
13、percent of unaged, min.) 50 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/51F 4 Smoke index (max.) Jacket 25 Fillers 45 Insulation 45Toxicity index (max.) Jacket 5 Fillers 5Insulation 1.5 Durometer (jacket) - Type A (hardness, min.)
14、 80 Weathering (jacket) No failure Electrical moisture absorption No failure UNIT ORDERING LENGTHS: Type Size Feet (nominal) LSMNW 7 1500 LSMNW 10 1500 LSMNW 14 through 44 1000 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revision to identify changes with respect to the previ
15、ous issue due to the extent of the changes. Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-055) 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-,-,-
