1、 INCH-POUND MIL-DTL-24643/8E 1 October 2009 SUPERSEDING MIL-DTL-24643/8D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 300 VOLTS, TYPE LSMMOP This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acqui
2、ring the product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, coated or uncoated, 24 AWG, Class O stranding. Second - Separator may be used at manufacturers option where required to provide free-stripping insulat
3、ion. Third - Thermoset insulation. Minimum average wall thickness of 0.020 inch. Standard identification code applied by Method 1 or Method 3. If identification Method 1 is used, the insulation color shall be black. Fourth - Five conductors shall be cabled together with a left-hand lay as required f
4、or the completed cable to meet the twisting and bending endurance tests. A tie cord shall be laid straight as a central core. Fillers may be used as necessary to form a firm well-rounded assembly. Cabling sequence shall be consecutive. Fifth - An optional binder. Sixth - Cross-linked polyolefin jack
5、et. Minimum average wall thickness of 0.040 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/8E TABLE I. Details. Military part no. M24643/8 Type and size Number of conductors Insulated conductor diameter min. (in
6、ch) Overall diameter max. (inch) -01UN LSMMOP-5 5 0.065 0.305 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 27.96 Voltage withstand (volts, root mean square, min.) Conductor to conductor 1000 Insulation resistance (megohms/10
7、00 feet, min.) Conductor to conductor 100 Conductor continuity No failure Group A: Visual and dimensional No failure Group B: Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Twisting and bending endurance At 75 C, cycles, min. 6000 At minus 302 C (cycles, min.) 20
8、00 Roller diameter (inches, max.) 1.5 Physicals (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 2 Provided by IHSNot for ResaleNo repro
9、duction or networking permitted without license from IHS-,-,-MIL-DTL-24643/8E 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 (percen
10、t of unaged, min.) 60 Permanence of printing (insulation, 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 inspec
11、tion 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 18Halogen content (percent, max.) Jacket 0.2 Fillers
12、0.2Insulation 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 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/8E 4 Toxic
13、ity index (max.) Jacket 5 Fillers 5 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) LSMMOP-5 500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in
14、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 6145-2008-012) Review Activities: Army AR, AV, CR Navy CG, EC DLA CC NOTE: The activities listed above were interested in this docum
15、ent 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-,-,-
