1、 INCH-POUND MIL-DTL-24643/2F 1 October 2009 SUPERSEDING MIL-DTL-24643/2E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 300 VOLTS, TYPE LSDCOP AND LSTCOP This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirement
2、s for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Non-Watertight First - Copper conductor, coated or uncoated (see table I for size). Second - Separator may be used at manufacturers option where required to provide free-stripping
3、insulation. Third - Thermoset insulation with minimum average wall thickness of 0.015 inch. Standard identification code applied by Method 3. Fourth - The specified number of conductors (see table I) shall be cabled together with a left-hand lay. The length of lay shall be as required for the comple
4、ted cable to meet the twisting and bending endurance tests. A tie cord shall be laid straight as a central core in LSDCOP-1. Fillers 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.
5、030 inch. NOTE: Because of the peculiar lay-up of LSDCOP-1 cable, the centering and circularity requirements shall not apply. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/2F TABLE I. Details. Conductors Overall diam
6、eter Military part no. M24643/2 Type and size No. Size AWG Conductor resistance (ohms) min. (inch) max. (inch) -01UN LSDCOP-1 2 20 (Class B) 11.42 0.235 0.250 -02UN LSDCOP-1 2 18 (Class K) 9.00 0.300 0.315 -03UN LSDCOP-2 2 18 (Class K) 7.16 0.310 0.330 -04UN LSTCOP-2 3 18 (Class K) 7.16 0.325 0.345
7、REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) See table I Voltage withstand (volts, root mean square, min.) Conductor to conductor 1500 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 100 Conductor cont
8、inuity 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.) 2000 NOTE: Roller diameters for bending endurance test sh
9、all be as follows: Cable type and size Roller diameter(inch, max.) LSDCOP-1 0.75 LSDCOP-1 0.95 LSDCOP-2 1.00 LSTCOP-2 1.00 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/2F Physicals (unaged) Insulation (extruded) Tensile strength (l
10、b/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 unaged, min.) 75 Elongation (percent of unaged, min
11、.) 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 failure Group D: Flame propagation (cable) No failure Qualification Inspection: Qual
12、ification 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 18Halogen content (percent, max.) Jac
13、ket 0.2 Fillers 0.2Insulation 0.2 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/2F 4 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index, max. Jacket 25 Fillers 45Insu
14、lation 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) All 500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not
15、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 6145-2008-007) Review Activities: Army AR, AV, CR Navy CG, EC DLA CC NOTE: The activities listed above were interested in th
16、is 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-,-,-
