1、AMSC N/A FSC 6145 INCH-POUND MIL-DTL-24640/12E 8 November 2011 SUPERSEDING MIL-DTL-24640/12D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRIC, -20 TO +105 C, 600 VOLTS, LIGHTWEIGHT, MULTI-PAIR, 26 AWG, TYPES 2XO AND 2XOW This specification is approved for use by all Departments and Agencies
2、 of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24640. Construction, Non-Watertight (2XO) and Watertight (2XOW) First - 19-strand, tin-coated copper conductor, 26 AWG. Watertight constructions shall be c
3、onstructed with 7 strands. Second - Component wires shall be SAE-AS81044/12, except identification shall be in accordance with the codes and methods of MIL-DTL-24640. Testing shall be in accordance with the component wire ratings and requirements listed in the specification sheet. Conformance testin
4、g shall be in accordance with SAE-AS81044 prior to cabling. Third - Two conductors twisted together. Pair lay length shall be in accordance with table II. Twisted pair identification code, one black and one white, applied using Method 6, or telephone color code applied using Method 3. For 2XO-77, if
5、 telephone color code is used, repeat the color code of pairs 1-11, in sequence, for pairs 67-77. Fourth - The required number of twisted pairs shall be cabled together in accordance with table III with a lay length not greater than 16 times the diameter over the outermost layer. Cable sequence shal
6、l be consecutive, starting with number 1 from center outward. Fillers may be used, as necessary, to form a round cable. Fifth - Optional binder tape. Sixth - Braided shield, tin-coated copper strands. Braid must be constructed to meet surface transfer impedance requirements as listed herein. Seventh
7、 - Optional binder tape. Eighth - Cross-linked polyolefin jacket (see table I for thickness). NOTE: Manufacturers identification tape or thread is required (see 3.7.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/12E 2 TABLE I. Cons
8、truction details. PIN M24640/12 Type number Number of pairs Jacket thickness (inch) (min.) Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) (min.) (max.) -01UO -02UO -03UO -04UO -05UO -06UO -07UO -08UO -09UO -10UO -11UO -12UO 2XO-6 2XO-18 2XO-24 2XO-42 2XO-60 2XO-77 2XOW-6 2XOW-18 2X
9、OW-24 2XOW-42 2XOW-60 2XOW-77 6 18 24 42 60 77 6 18 24 42 60 77 0.038 0.041 0.044 0.044 0.047 0.047 0.038 0.041 0.044 0.044 0.047 0.047 0.305 0.417 0.473 0.565 0.641 0.728 0.310 0.420 0.475 0.570 0.660 0.740 0.329 0.449 0.509 0.609 0.691 0.785 0.340 0.460 0.525 0.630 0.710 0.800 81.6 140.0 175.0 275
10、.0 334.0 395.0 78.0 129.0 178.0 243.0 315.0 400.0 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/12E 3 TABLE II. Pair lay 1/. Pair no. Pair lay (inches) Pair no. Pair lay (inches) Pair no. Pair lay (inches) 1 2 3 4 5 6 7 8 9 10 11 12 1
11、3 14 15 16 17 18 19 20 21 22 23 24 25 26 1.5 1.0 2.0 3.0 4.5 1.0 2.0 3.0 1.5 2.5 5.5 1.5 2.5 3.7 5.5 1.5 2.5 3.7 1.5 2.5 3.7 5.5 1.0 2.0 3.0 4.5 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1.0 2.0 3.0 4.5 1.0 2.0 3.0 4.5 1.0 2.0 3.0 4.5 1.0 2.0 3.0 4.5 1.0 1.5 2.0 2
12、.5 3.0 4.5 5.5 1.0 1.5 2.0 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 2.5 3.0 4.5 5.5 1.0 1.5 2.0 2.5 3.0 4.5 5.5 1.0 1.5 2.0 2.5 3.0 4.5 5.5 1.0 1.5 2.0 2.5 3.0 4.5 5.5 NOTE: 1/All lays are left-handed. TABLE III. Assembly. Type number Core Assembly Layer 1 Layer 2 L
13、ayer 3 Layer 4 2XO/W-6 2XO/W-18 2XO/W-24 2XO/W-42 2XO/W-60 2XO/W-77 - Pair 1 Pairs 1-2 - Pair 1 Pairs 1-3 Pairs 1-6 Pairs 2-6 Pairs 3-10 Pairs 1-8 Pairs 2-7 Pairs 4-12 - Pairs 7-18 Pairs 11-24 Pairs 9-22 Pairs 8-19 Pairs 13-27 - - - Pairs 23-42 Pairs 20-36 Pairs 28-49 - - - - Pairs 37-60 Pairs 50-77
14、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/12E 4 REQUIREMENTS: Qualification required. Construction details: See tables I, II, and III. Component wire: The component wire shall be in accordance with SAE-AS81044 and shall be tested
15、 in accordance with the following wire ratings and additional requirements. Temperature rating 150 C (302 F) (max.) conductor temperature Voltage rating 600 volts (root mean square) at sea level Accelerated aging Non-blocked Oven temperature, 3002 C (5723.6 F) for 6 hours Water-blocked Oven temperat
16、ure, 2502 C (4823.6 F) for 6 hours Blocking 1502 C (3023.6 F) Flammability 30 seconds (max.) 3.0 inches (max.) No flaming of tissue paper Humidity resistance 5000 megohms for 1000 feet (min.) insulation resistance after humidity exposure Dielectric test Primary insulation 6.0 kilovolts (peak), 100 p
17、ercent impulse test (when tested in lieu of spark test) Finished wire 8.0 kilovolts (peak), 3 kHz spark test 5.5 kV, 100 percent test Insulation resistance 5000 megohms for 1000 feet (min.) Life cycle Non-blocked Oven temperature, 2002 C (3923.6 F) for 168 hours Water-blocked Oven temperature, 2002
18、C (3923.6 F) for 120 hours Physical properties of primary insulation Tensile strength 2500 lb/in2(min.) Elongation 150 percent (min.) Shrinkage Non-blocked 0.125 inch (max.) at 3002 C (5723.6 F) Water-blocked 0.125 inch (max.) at 2502 C (4823.6 F) Spark test primary insulation 1500 volts (root mean
19、square), 3 kHz, 100 percent test Surface resistance 500 megohms inches (min.), initial and final readings Thermal shock Oven temperature, 1502 C (3023.6 F) Maximum change in measurement 0.060 inch Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D
20、TL-24640/12E 5 Wet dielectric test 2500 volts (root mean square) Wrap test Mandrel wrap test required INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 44.24 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to shield 1000 Compon
21、ent shield to shield Not applicable Insulation resistance (megohms/1000 feet, min.) 2500 Conductor and shield continuity No failure Jacket flaws No failure Group A: Visual and dimensional No failure Capacitance Mutual capacitance (at 1 MHz, picofarads/foot(pF/ft), max.) 33 Capacitance unbalance (per
22、cent, max.) 15 Characteristic impedance (at 1 MHz, ohms) 75 (min.), 105 (max.) Watertightness (type 2XOW only) No failure (see table IX of MIL-DTL-24640 for limits of water leakage) Weight No failureGroup B: Cold bending No failure Drip (type 2XOW only) No failure Cross-link proof test (percent, max
23、.) Jacket 50 Tear (lb/in thickness, min.) 35 Physicals (unaged) Jacket Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Attenuation (at 3 MHz, dB/100 feet, max.) Not applicable Gas flame (1 hour) Not applicable Provided by IHSNot for ResaleNo reproduction or networking permitted w
24、ithout license from IHS-,-,-MIL-DTL-24640/12E 6 Group C: Physicals (aged), air oven Jacket Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing 25 (conductor insulation, cycles, Method 1 only, min.) Permanence of printing (jacket, cycles, min.)
25、 125 Heat distortion (percent of unaged, max.) 30 Cable sealant removability (type 2XOW only) No failure Shrinkage No failureSurface transfer impedance Milliohms per meter (max.) 700 EMP response (dB, min.) 60 Group D: Flame propagation No failure Qualification Inspection: Qualification inspection s
26、hall include basic electricals; groups A, B, C, and D; plus the following: Aging and compatibility (cable) No failure Acid gas equivalent (percent, max.) Jacket 2 Fillers 2 Insulation 18 Halogen content (percent, max.) Jacket 0.2 Fillers 0.2 Immersion (jacket) Tensile strength (percent of unaged, mi
27、n.) 50 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insulation 10Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/12E 7 Toxicity index (max.) Jacket 5 Fillers 5 Insulation 1.5 Durometer (jacket) - Type A
28、 (hardness, min.) 80 Weathering (jacket) No failure Fungus resistance No failure Abrasion resistance No failure Gas flame (3 hour) Not applicable Component wire No failure UNIT ORDERING LENGTHS: Size Feet (nominal) All types and sizes 6 - 24 500 All types and sizes 42 - 77 250 CHANGES FROM PREVIOUS
29、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 MI Navy SH Navy SH (Project 6145-2009-080) Review Activities: Army AR, AV, CR, CR4 Navy CG, EC DLA CC NOTE: The activit
30、ies 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 https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
