1、 INCH-POUND MIL-DTL-24643/64 28 June 2007 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, TWISTED SHIELDED PAIR(S), -40 C TO 105 C, 600V, TYPE LSTPSJ This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product describe
2、d herein shall consist of this specification sheet and MIL-DTL-24643. REQUIREMENTS: Qualification Required. Construction (non-watertight)First - Copper conductor, tin-coated, in accordance with ASTM B286 (see Table I for sizes). Second - Separator may be used at the manufacturers option where requir
3、ed to provide free-stripping insulation. Third - Thermoset Insulation. Nominal 0.010 inch (see Table I for finished wire diameter). Fourth - Two conductors (one black and one white) twisted together with a lay length as specified in Table II. Fifth - Braided shield of #36 AWG tin-coated copper. Mini
4、mum coverage shall be 90 percent and the braid angle shall be between 20 and 40 degrees. Sixth - The required number of pairs (see Table III) cabled together with a lay length as specified in 3.4.4 of MIL-DTL-24643. Fillers shall be used as required to form a well rounded assembly. Seventh - Optiona
5、l binder tape applied with overlap. Eighth - Cross-linked polyolefin (XLPO) jacket. Jacket wall thickness shall be 0.0300.005 inch for cables with core diameters less than 0.300 inch. Jacket wall thickness shall be 0.0400.005 inch for cables with core diameters equal to or greater than 0.300 inch (s
6、ee Table III for finished cable diameter). AMSC N/A FSC 6145 Source: http:/ - Downloaded: 2008-02-14T01:34ZCheck the source to verify that this is the current version before use.MIL-DTL-24643/64 TABLE I. Wire configurations and dimensions. Finished Wire Diameter (inch) Wire Size Stranding Conductor
7、Diameter (inch) (0.003 inch) Min. Max. Conductor Resistance (ohms/1000 ft) at 25 C, Max. 24 19 X 36 0.024 0.041 0.047 24.91 22 19 X 34 0.030 0.047 0.053 15.59 20 19 X 32 0.039 0.056 0.062 9.57 18 19 X 30 0.049 0.066 0.072 6.10 16 19 X 29 0.056 0.073 0.079 4.73 14 19 X 27 0.070 0.087 0.093 2.99 TABLE
8、 II. Length of lay. Wire Size Range Lay Length Twist Tolerance (inch) 20-24 1 0.25 14-18 1.5 0.25 TABLE III. Cable core and finished cable diameter. Part No. M24643/64 Wire Size Number of Pairs Cable Core Diameter (includes braid and optional binder tape) (inch) (0.006 inch for single pair) (0.030 i
9、nch for multi-pair cables) Finished Cable Diameter (inch) (0.016 inch for single pair cables) (0.030 inch for multi-pair cables) -01UN 24 1 0.110 0.170 -02UN 22 1 0.122 0.182 -03UN 20 1 0.140 0.200 -04UN 18 1 0.160 0.220 -05UN 16 1 0.174 0.234 -06UN 14 1 0.202 0.262 -07UN 24 2 0.200 0.260 -08UN 22 2
10、 0.225 0.285 -09UN 20 2 0.265 0.325 -10UN 18 2 0.310 0.390 -11UN 16 2 0.340 0.420 -12UN 14 2 0.385 0.465 -13UN 24 3 0.215 0.275 -14UN 22 3 0.225 0.285 -15UN 20 3 0.265 0.325 -16UN 18 3 0.310 0.390 -17UN 16 3 0.370 0.450 2 Source: http:/ - Downloaded: 2008-02-14T01:34ZCheck the source to verify that
11、this is the current version before use.MIL-DTL-24643/64 TABLE III. Cable core and finished cable diameter Continued. Part No. M24643/64 Wire Size Number of Pairs Cable Core Diameter (includes braid and optional binder tape) (inch) (0.006 inch for single pair) (0.030 inch for multi-pair cables) Finis
12、hed Cable Diameter (inch) (0.016 inch for single pair cables) (0.030 inch for multi-pair cables) -18UN 14 3 0.410 0.490 -19UN 24 4 0.235 0.295 -20UN 22 4 0.265 0.325 -21UN 20 4 0.315 0.395 -22UN 18 4 0.370 0.450 -23UN 16 4 0.400 0.480 -24UN 14 4 0.460 0.540 EXAMINATION AND TESTS: Basic Electricals:
13、Conductor resistance (ohms/1000 feet at 25 C, max.) see Table I Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 V Conductor to shield 1000 V Insulation resistance (megaohms/1000 feet, min.) Conductor to conductor 500 Conductor to shield 500 Conductor and shield continui
14、ty No Failure Jacket flaws No Failure Group A: Visual and dimensional No Failure Group B: Drip (1051 C) Zero Thermoset proof test (percent, max.) Insulation 50Jacket (when tested at 200 C) 50 Physicals (unaged) Insulation Tensile strength (lb/in2, min.) 700 3 Source: http:/ - Downloaded: 2008-02-14T
15、01:34ZCheck the source to verify that this is the current version before use.MIL-DTL-24643/64 Elongation (percent, min.) 150 Jacket Tensile strength (lb/in2, min.) 130 Elongation (percent, min.) 160 Group C: Physicals (aged) Air oven Insulation Tensile strength (percent of unaged, min.) 75 Elongatio
16、n (percent of unaged, min.) 75 Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Shrinkage No Failure Heat distortion (percent of unaged, max.) 30 Permanence of printing (jacket) (cycles, min.) 125 Shield-conformance to material, constructions and c
17、overage No Failure Group D: Flame propagation (finished cable) No Failure Qualification Inspection: Qualification inspection shall include basic electricals, all groups A, B, C, and D (as defined above), plus the following: Aging and compatibility (cable) No Failure Abrasion resistance (jacket) No F
18、ailure Durometer (jacket) Type A (hardness, min.) 80 Weathering (jacket) No Failure Acid gas equivalent (percent, max.) Jacket 2 Fillers 2Insulation 18Halogen content (percent, max.) Jacket 0.2 Fillers 0.2 4 Source: http:/ - Downloaded: 2008-02-14T01:34ZCheck the source to verify that this is the cu
19、rrent version before use.MIL-DTL-24643/64 Insulation 0.2 Immersion (jacket) 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 1.5UNIT ORDERING LENGTHS: All sizes
20、1000 feet (nominal). Custodians: Preparing Activity: Army MI Navy SH Navy SH (Project 6145-2006-068) Review Activities: Army AR, AV, CR Navy CG, EC 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. 5 Source: http:/ - Downloaded: 2008-02-14T01:34ZCheck the source to verify that this is the current version before use.
