1、AMSC N/A FSC 6145 INCH-POUND MIL-DTL-24640/8E 8 November 2011 SUPERSEDING MIL-DTL-24640/8D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRIC, -20 TO +105 C, 600 VOLTS, LIGHTWEIGHT, MULTI-CONDUCTOR, 20 AWG, TYPES MXO AND MXOW This specification is approved for use by all Departments and Agenc
2、ies 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 (MXO) and Watertight (MXOW) First - 19-strand, tin-coated copper conductor, 20 AWG. Watertight constructions shall b
3、e constructed 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 done in accordance with the component wire ratings and requirements listed in this specification sheet. Conforman
4、ce testing shall be in accordance with SAE-AS81044 prior to cabling. Identification codes applied using Method 1 or 3. If Method 1 is used, component wire shall be white. Third - The required number of singles shall be cabled together. Cabling sequence shall be consecutive, starting with number 1 fr
5、om center outward. Fillers may be used, as necessary, to form a round cable. Fourth - Optional binder tape. Fifth - Braided shield, tin-coated copper strands. Braid must be constructed to meet surface transfer impedance requirements as listed herein. Sixth - Optional binder tape. Seventh - Cross-lin
6、ked 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-24640/8E 2 TABLE I. Construction details. PIN M24640/8 Type number N
7、umber of component Jacket thickness (inch) (min.) Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) (min.) (max.) -01UO -02UO -03UO -04UO MXO-10 MXO-14 MXOW-10 MXOW-14 10 14 10 14 0.038 0.041 0.038 0.041 0.349 0.380 0.350 0.380 0.377 0.410 0.380 0.415 118.0 147.0 119.0 147.0 REQUIREME
8、NTS: Qualification required. Construction details: See table I. Component wire: The component wire shall be in accordance with SAE-AS81044 and shall be tested in accordance with the following wire ratings and additional requirements. Temperature rating 150 C (302 F) (max.) conductor temperature Volt
9、age 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 temperature, 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 Humi
10、dity resistance 5000 megohms for 1000 feet (min.) insulation resistance after humidity exposure Dielectric test (100% test) Primary insulation Impulse test - 6.0 kV (peak) or 3 kHz spark test - 1.5kV root mean square Component wire Impulse test - 8.0 kV (peak) or 3 kHz spark test - 5.5kV root mean s
11、quare 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 C (3923.6 F) for 120 hours Physical properties of primary insulation Tensile strength 2500 lb/in2(min.) Provided by IHSNot for R
12、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/8E 3 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) Surface resistance 500 megohms inches (min.), initial and final
13、 readings Thermal shock Oven temperature, 1502 C (3023.6 F) Maximum change in measurement 0.060 inch 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.) 10.79 Voltage withstand (volt
14、s, root mean square, min.) Conductor to conductor 2000 Conductor to shield 1000 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 capaci
15、tance (at 1 MHz, picofarads/foot (pF/ft), max.) Not applicable Capacitance unbalance (percent, max.) Not applicable Characteristic impedance (at 1 MHz, ohms) Not applicable Watertightness (Type MXOW only) No failure (see table IX of MIL-DTL-24640 for limits of water leakage) Weight No failureGroup B
16、: Cold bending No failure Cross-link proof test (percent, max.) Jacket 50 Drip (Type MXOW only) No failure Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/8E 4 Tear (lb/in thickness, min.) 35 Physicals (unaged) Jacket Tensile strength (
17、lb/in2, min.) 1300 Elongation (percent, min.) 160 Attenuation (at 3 MHz, dB/100 feet, max.) Not applicable Gas flame (1 hour) Not applicable Group C: Physicals (aged), air oven Jacket Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Permanence of printing 25 (con
18、ductor insulation, cycles, Method 1 only, min.) Permanence of printing (jacket, cycles, min.) 125 Heat distortion (percent of unaged, max.) 30 Cable sealant removability (Type MXOW only) No failure Shrinkage No failureSurface transfer impedance Milliohms per meter (max.) 700 EMP response (dB, min.)
19、60 Group D: Flame propagation No failure Qualification Inspection: Qualification inspection shall 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 (perce
20、nt, max.) Jacket 0.2 Fillers 0.2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/8E 5 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insula
21、tion 10Toxicity index (max.) Jacket 5 Fillers 5 Insulation 1.5 Durometer (jacket) - Type A (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: Type and size F
22、eet (nominal) All types and sizes 500 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 MI Navy SH Navy SH (Project 6145-2009-076) Review Activitie
23、s: Army AR, AV, CR, CR4 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 https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
