1、 INCH-POUND MIL-DTL-24643/7F 1 October 2009 SUPERSEDING MIL-DTL-24643/7E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 600 VOLTS, TYPE LSMHOF 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, 16 AWG, Class K 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, insulation color shall be black. Fourth - The specified number of conductors (see table I) shall be cabled together as re
4、quired for the completed cable to meet the twisting and bending endurance tests. The outer layer shall be a left-hand lay. The inner layer(s) lay direction at the manufacturers option. Fillers may be used as necessary to form a firm well-rounded assembly. Cabling sequence to be consecutive, starting
5、 with no. 1, from the center outward. A single conductor shall not be used in the center for the cable core. Fifth - An optional binder. Sixth - Cross-linked polyolefin jacket. Minimum average wall thickness of 0.060 inch AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking p
6、ermitted without license from IHS-,-,-MIL-DTL-24643/7F TABLE I. Details. Overall diameter Military part no. M24643/7 Type and size Number of conductors Min. (inch) Max. (inch) -01UN LSMHOF-7 7 0.465 0.500 -02UN LSMHOF-10 10 0.540 0.585 -03UN LSMHOF-14 14 0.585 0.635 -04UN LSMHOF-19 19 0.650 0.705 -0
7、5UN LSMHOF-24 24 0.735 0.795 -06UN LSMHOF-30 30 0.775 0.835 -07UN LSMHOF-37 37 0.855 0.925 -08UN LSMHOF-44 44 0.925 1.000 -09UN LSMHOF-61 61 1.100 1.175 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 4.59 Voltage withstand (vo
8、lts, root mean square, min.) Conductor to conductor 2000 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 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
9、Twisting and bending endurance (see table I for roller size) At 75 C (cycles, min.) 6000 At minus 302 C (cycles, min.) 2000 Physicals (unaged) Insulation (extruded) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/7F Tensile strength (
10、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 unaged, min.) 75 Elongation (percent of unaged, mi
11、n.) 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 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable fill (sealant) remova
12、bility No failure 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 compatibility (cable) (1255 C) No failure Abrasion resistance (jacket) (scrape
13、s, min.) 75 Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18Halogen content (percent, max.) Jacket 0.2 Fillers 0.2Insulation 0.2 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/7F 4 Immersion (jacket) Tensile stren
14、gth (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 Electrical moisture absorption No failure
15、 UNIT ORDERING LENGTHS: Type and size Feet (nominal) All sizes 1500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not 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
16、6145-2008-011) 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-,-,-
