1、 INCH-POUND MIL-DTL-24643/18F 1 October 2009 SUPERSEDING MIL-DTL-24643/18E 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, -20 C TO +105 C, 1000 VOLTS, TYPE LSMSCU (INCLUDING VARIATION LSMSCS) This specification is approved for use by all Departments and Agencies of the Department of De
2、fense. The requirements for acquiring 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, 18 AWG, Class B stranding. Second - Thermoset insulation. Minimum average wall
3、 thickness of 0.018 inch. Diameter of the insulation 0.084 inch minimum. Third - Optional glass braid. Fourth - Optional covering (unless required by 3.3.5 of MIL-DTL-24643). Diameter over the glass braid covering shall be a maximum of 0.113 inch. Standard identification code applied by Method 1. Fi
4、fth - The required number of conductors (see table I or II) shall be cabled together in accordance with 3.4.4 of MIL-DTL-24643. Except the lay of the two outer layers for sizes 44, 61, and 91 shall not exceed 18 times the pitch diameter of the layer. Cabling sequence shall be consecutive, starting w
5、ith no. 1 from the center outward. Fillers may be used as necessary to form a firm well-rounded assembly. Sixth - An optional binder. Construction, Variant Type LSMSCU Seventh - Cross-linked polyolefin jacket (see table I or II for thickness). Construction, Variant Type LSMSCS Seventh - Braided shie
6、ld of tin-coated copper. Eighth - Spirally wrapped polyethylene terephthalate (polyester film) separator tape. Ninth - Braided shield of tin-coated copper. Tenth - An optional binder. Eleventh - Cross-linked polyolefin jacket (see table I or II for thickness). AMSC N/A FSC 6145 Provided by IHSNot fo
7、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/18F TABLE I. Details (unshielded). Overall diameter Military part no. M24643/18 Type and size No. of conductors Jacket thickness min. avg. (inch) min. (inch) max. (inch) -01UN LSMSCU-7 7 0.040 0.447 0.484 -02U
8、N LSMSCU-10 10 0.050 0.575 0.622 -03UN LSMSCU-14 14 0.050 0.617 0.668 -04UN LSMSCU-19 19 0.050 0.682 0.738 -05UN LSMSCU-24 24 0.050 0.790 0.855 -06UN LSMSCU-30 30 0.050 0.833 0.901 -07UN LSMSCU-37 37 0.060 0.926 1.002 -08UN LSMSCU-44 44 0.060 1.030 1.114 -09UN LSMSCU-61 61 0.060 1.156 1.250 -10UN LS
9、MSCU-91 91 0.060 1.369 1.480 TABLE II. Details (shielded). Overall diameter (inches) Military part no. M24643/18 Type and size No. of conductors Jacket thickness min. avg. (inch) min. (inch) max. (inch) -01UD LSMSCS-7 7 0.040 0.507 0.544 -02UD LSMSCS-10 10 0.050 0.635 0.682 -03UD LSMSCS-14 14 0.050
10、0.677 0.728 -04UD LSMSCS-19 19 0.050 0.742 0.798 -05UD LSMSCS-24 24 0.050 0.850 0.915 -06UD LSMSCS-30 30 0.050 0.893 0.961 -07UD LSMSCS-37 37 0.060 0.986 1.065 -08UD LSMSCS-44 44 0.060 1.090 1.174 -09UD LSMSCS-61 61 0.060 1.216 1.310 -10UD LSMSCS-91 91 0.060 1.429 1.540 REQUIREMENTS: Qualification r
11、equired. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 7.07 Voltage withstand (volts, root mean square, min.) Conductor to conductor 3000 Conductor to shield (Type LSMSCS only) 1500 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
12、cense from IHS-,-,-MIL-DTL-24643/18F Overall shield to overall shield (Type LSMSCS only) 200 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor to shield (Type LSMSCS only) 500 Overall shield to overall shield (Type LSMSCS only) 100 Conductor continuity No failure S
13、hield continuity (Type LSMSCS only) No failure Group A: Visual and dimensional No failure Watertightness (see MIL-DTL-24643 for limits of water leakage) No failure Abrasion resistance (scrapes min.) No damage Crack resistance No damage Group B: Cold bending cable No failure Thermoset proof test (per
14、cent, max.) Insulation 50 Jacket (when tested at 200 C) 50 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 Tear (lb/in thickness, min.) 35
15、Gas flame (1 hour) No failure NOTE: Type LSMSCS only, shields not grounded during test. Group C: Physicals (aged) air oven Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 3 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
16、ut license from IHS-,-,-MIL-DTL-24643/18F 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 Surface transfer impedance (Type LSMSCS on
17、ly) Milliohms per meter (max.) 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: Cold working (minus 202 C) No damage Gas flame (3 hour) No failur
18、e NOTE: Type LSMSCS only, shields not grounded during test. 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 Imm
19、ersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insulation 45 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/18F 5 Toxicity index (max.) Jac
20、ket 5 Fillers 5 Insulation 1.5Durometer (jacket) - Type A (hardness, min.) 80 Weathering (jacket) No failure Electrical moisture absorption No failure UNIT ORDERING LENGTHS: Type Size Feet (nominal) LSMSCU, LSMSCS 7 and 10 1500 All other sizes 1000 CHANGES FROM PREVIOUS ISSUE: Marginal notations are
21、 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 6145-2008-022) Review Activities: Army AR, AV, CR Navy CG, EC DLA CC NOTE: The activities listed above were interested
22、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-,-,-
