1、 INCH-POUND MIL-DTL-24643/23G 1 October 2009 SUPERSEDING MIL-DTL-24643/23F 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +105 C, 300 VOLTS, TYPE LSTTSU This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for ac
2、quiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. Construction, Watertight with Circuit Integrity First - Copper conductor, coated or uncoated, 22 AWG, Class K stranding. Second - Thermoset insulation, minimum average wall thickness 0.017 inch. Third -
3、 Insulation jacket of polyamide, in accordance with ASTM D4066, colored (see fourth) or transparent at manufacturers option. Minimum average wall thickness of 0.003 inch. Diameter over insulated and jacketed conductor shall be 0.076 inch minimum. Twisted pair identification code applied by Method 6.
4、 Fourth - Two conductors, one white, one black, twisted together to form a pair having a left-hand lay length not greater than 2 inches. For type LSTTRSU-1 only, three conductors, one white, one black, and one red twisted together to form a triad having a lay length no greater than 2 inches. Fifth -
5、 The specified number of pairs (see table I) shall be cabled together with a lay not greater than 10 inches. Cabling sequence shall be consecutive, starting with no. 1 from the center outward. Outer most layer shall be left-hand. Fillers may be used as necessary to form a firm, well-rounded assembly
6、. Sixth - An optional binder. Seventh - Cross-linked polyolefin jacket (see table I for thickness). AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/23G TABLE I. Details. Military part no. M24643/23 Type and size Number
7、 of pairs Jacket thickness min. avg. (inch) Cable overall diameter max. (inches) -01UN LSTTSU-1-1/2 1-1/2 0.050 0.330 -02UN LSTTSU-3 3 0.050 0.450 -03UN LSTTSU-5 5 0.050 0.540 -04UN LSTTSU-10 10 0.062 0.675 -05UN LSTTSU-15 15 0.062 0.800 -06UN LSTTSU-20 20 0.062 0.870 -07UN LSTTSU-30 30 0.075 1.080
8、-08UN LSTTSU-40 40 0.075 1.200 -09UN LSTTSU-50 50 0.075 1.400 -10UN LSTTSU-60 60 0.075 1.450 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 18.60 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 In
9、sulation resistance (megohms/1000 feet, min.) Conductor to conductor 100 Conductor continuity No failure Group A: Visual and dimensional No failure Abrasion resistance (scrapes, min.) 250 Watertightness (see MIL-DTL-24643 for limits of water leakage) No failure Crack resistance No damage Group B: Co
10、ld bending cable No failure Thermoset proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Drip (951 C) Zero 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/23G Physicals (unaged) Insulation (extruded) Tensile str
11、ength (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 Gas flame (1 hour) (see note below) No failure Group C: Physicals (aged) air oven Jacket (cable) Tensile strength (percent of una
12、ged, min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing (insulation) (cycles, min.) 25 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 (ca
13、ble) No failure NOTE: For gas flame test of LSTTSU-1, the three connectors shall be connected to phases A, B, and C of the power supply. For test of all other sizes, connection of conductor pairs shall be in accordance with the following pattern: a. Pair #1: One conductor to phase A, one conductor t
14、o phase B b. Pair #2: One conductor to phase C, one conductor to phase A c. Pair #3: One conductor to phase B, one conductor to phase C d. Pair #4: One conductor to phase A, one conductor to phase B e. Pair #5: One conductor to phase C, one conductor to phase A f. Pair #6 through Pair #60: In simila
15、r sequence. Qualification Inspection: Qualification inspection shall include basic electricals; groups A, B, C, and D; plus the following: Cold working (minus 202 C) No damage Gas flame (3 hours) (see note 1) No failure Aging and compatibility (cable) (1255 C) No failure 3 Provided by IHSNot for Res
16、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/23G 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
17、e strength (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
18、failure UNIT ORDERING LENGTHS: Type Size Feet (nominal) LSTTSU 1 through 10 2500 LSTTSU 15 and 20 1500 LSTTSU 30 through 60 1000 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. 4 Pr
19、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/23G 5 Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2008-027) Review Activities: Army AR, AV, CR Navy CG, EC DLA CC NOTE: The activities listed above were interested
20、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-,-,-
