1、 INCH-POUND MIL-DTL-24643/29E 1 October 2009 SUPERSEDING MIL-DTL-24643/29D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +90 C, 300 VOLTS, TYPE LSMU (INCLUDING VARIATION LSMUS) This specification is approved for use by all Departments and Agencies of the Department of Defense
2、. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. This cable can be manufactured in two variations: LSMU and LSMUS (double overall shield) Construction, Non-Watertight First - Copper conductor, tin-coated, ASTM B286, Size 20 7s
3、trands. Second - Separator may be used at manufacturers option where required to provide free-stripping insulation. Third - Thermoset insulation. Minimum average wall thickness of 0.013 inch. Standard identification code applied by Method 1 on white-colored insulation. Fourth - The specified number
4、of singles (see table I) shall be cabled together in accordance with 3.4.4 of MIL-DTL-24643. Cabling sequence shall be consecutive starting with no. 1 from the center outward. Fillers may be used as necessary to form a firm well-rounded assembly. Fifth - An optional binder. Construction, Variant Typ
5、e LSMU Sixth - Cross-linked polyolefin jacket. Minimum average wall thickness of 0.030 inch. Construction, Variant Type LSMUS Sixth - Braided shield of tin-coated copper. Seventh - Spirally wrapped 0.002-inch thick polyethylene terephthalate (polyester film) separator tape with 25 percent minimum ov
6、erlap. Eighth - Braided shield of tin-coated copper. Ninth - An optional binder. Tenth - Cross-linked polyolefin jacket. Minimum average wall thickness of 0.030 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/29E
7、 TABLE I. Details (shielded and unshielded). Overall diameter Military part no. M24643/29 Type and size Number of conductors min. (inch) max. (inch) -01UN LSMU-14 14 0.365 0.400 -01UD LSMUS-14 14 0.425 0.460 REQUIREMENTS: Qualification required. INSPECTION: Basic Electricals: Conductor resistance (o
8、hms/1000 feet at 25 C, max.) 10.93 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to overall shield (Type LSMUS only) 1000 Overall shield to overall shield (Type LSMUS only) 200 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 2000 Condu
9、ctor to overall shield (Type LSMUS only) 2000 Overall shield to overall shield (Type LSMUS only) 100 Conductor continuity No failure Shield continuity (LSMUS only) No failure Jacket flaws (LSMUS only) No failure Group A: Visual and dimensional No failure Group B: Cold bending cable No failure Thermo
10、set proof test (percent, max.) Insulation 50 Jacket (when tested at 200 C) 50 Physicals (unaged) Insulation (extruded) Tensile strength (lb/in2, min.) 700 Elongation (percent, min.) 150 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/
11、29E 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.) 75 Jacket (cable) Tensile strength (percen
12、t of unaged, 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 Shrinkage No failure Surface transfer impedance (Type LSMUS only) Milliohms per meter (m
13、ax.) 700 EMP response (dB, min.) 60 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) (scrapes,
14、min.) 75 Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18Shield insulation 2 Halogen content (percent, max.) Jacket 0.2 Fillers 0.23 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/29E 4 Insulation 0.2 Immersion (jac
15、ket) Tensile 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 abs
16、orption No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) LSMU-14 and LSMUS-14 2500 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
17、 MI Navy SH Navy SH (Project 6145-2008-033) 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-,-,-
