1、 INCH-POUND MIL-DTL-24643/10D 1 October 2009 SUPERSEDING MIL-DTL-24643/10C 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, TYPE LSPBTMU This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the
2、 product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Watertight First - One copper and one constantan conductor for each pair, uncoated. 22 AWG, Class K stranding. The conductor shall have a cross-sectional area between 672 cma and 728 cma. Temperature
3、/electromotive force relationship shall follow ANSI MC96.1. Any necessary joints in the individual strands shall be silver-soldered for copper, and welded for constantan. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - Thermoset ins
4、ulation. Minimum average wall thickness of 0.015 inch. Telephone identification code applied by Method 3. Fourth - Each pair shall be one copper and one constantan conductor cabled together with a lay not greater than 3 inches. Fifth - The specified number of pairs (see table I) shall be cabled in a
5、ccordance with 3.4.4 of MIL-DTL-24643. Fillers may be used as necessary to form a firm, well-rounded assembly. Cabling sequence shall be consecutive, starting with pair no. 1, from the center outward. Sixth - An optional binder. Seventh - Cross-linked polyolefin jacket. Minimum average wall thicknes
6、s of 0.040 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/10D TABLE I. Details. Overall diameter Military part no. M24643/10 Type and size Number of pairs min. (inch) max. (inch) -01UN LSPBTMU-5 5 0.499 0.540 -0
7、2UN LSPBTMU-15 15 0.694 0.750 -03UN LSPBTMU-30 30 0.907 0.980 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: ANSI MC96.1 calibration limits of error 1 C Voltage withstand (volts, root mean square, min.) Conductor to conductor 1000 Insulation resistance (megohms/1000 feet, min.)
8、 Conductor to conductor 100 Conductor continuity No failure Group A: Visual and dimensional No failure Watertightness (see MIL-DTL-24643 for limits of water leakage) No failure Group B: Cold bending cable No failure Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50
9、Drip (951 C) Zero 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 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
10、 IHS-,-,-MIL-DTL-24643/10D 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.) 75 Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.)
11、60 Permanence of printing (jacket) (cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable fill (sealant) removability No failure Shrinkage No failure Group D: Flame propagation (cable) No failure Qualification Inspection: Qualification inspection shall include basic electricals; group
12、s 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 0.2Insulation 0.2 Immersion (jacket) Tensil
13、e strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 453 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/10D 4 Insulation 45 Toxicity index (max.) Jacket 5 Fillers 5Insulat
14、ion 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) LSPBTMU-5 2500 LSPBTMU-15 1500 LSPBTMU-30 1000 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not used in this revi
15、sion 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 6145-2008-014) 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-,-,-
