1、AMSC N/A FSC 6145 INCH-POUND MIL-DTL-24640/4E 8 November 2011 SUPERSEDING MIL-DTL-24640/4D 22 August 2002 DETAIL SPECIFICATION SHEET CABLE, ELECTRIC, -20 TO +105 C, 600 VOLTS, LIGHTWEIGHT, MULTI-PAIR, 20 AWG, TYPES TTX AND TTXWB 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 (TTX) and Watertight (TTXWB) First - 19-strand, tin-coated copper conductor, 20 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 on this specification sheet. Conformance testi
4、ng shall be in accordance with SAE-AS81044 prior to cabling. Third - Two component wires, one black and one white, shall be twisted together to form the required number of pairs. The pitch shall be 1 inch. Identification codes applied using Method 6. Fourth - The required number of pairs shall be ca
5、bled together. Fifth - Optional binder tape. Sixth - 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/
6、4E 2 TABLE I. Construction details. PIN M24640/4 Type number Number of pairs Jacket thickness (inch) (min.) Cable diameter (inch) Cable weight (pounds per 1000 feet) (max.) (min.) (max.) -01UN -02UN -03UN -04UN TTX-3 TTX-15 TTXWB-3 TTXWB-15 3 15 3 15 0.038 0.044 0.038 0.045 0.296 0.549 0.310 0.550 0
7、320 0.591 0.330 0.591 62.1 221.0 69.5 243.9 REQUIREMENTS: 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
8、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 temperature, 2502 C (4823.6 F) for 6 hours Blocking 1502 C (3023.6 F) Color In accordance with M
9、IL-STD-104, Class 1; white preferred 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 (100% test) Primary insulation Impulse test - 6.0 kV (peak) or 3 kHz sp
10、ark test - 1.5kV root mean square Component wire Impulse test - 8.0 kV (peak) or 3 kHz spark test - 5.5kV root mean square Temperature rating 150 C (302 F) (max.) conductor temperature Insulation resistance 5000 megohms for 1000 feet (min.) Life cycle Non-blocked Oven temperature, 2002 C (3923.6 F)
11、for 168 hours Water-blocked Oven temperature, 2002 C (3923.6 F) for 120 hours Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24640/4E 3 Physical properties of primary insulation Tensile strength 2500 lb/in2(min.) Elongation 150 percent (min.
12、) 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 readings Thermal shock Oven temperature, 1502 C (3023.6 F) Maximum change in measurement 0.060 inch Wet dielectric test
13、2500 volts (root mean square) Wrap test Mandrel wrap test required INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 10.95 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to shield Not applicable Shield to shield Not applicable
14、 Insulation resistance (megohms/1000 feet, min.) 2500 Conductor 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.) Not applicable Capacitance unbalance (percent, max.) Not applicable Charac
15、teristic impedance (at 1 MHz, ohms) Not applicable Watertightness (Type TTXWB only) No failure (see table IX of MIL-DTL-24640 for limits of water leakage) Weight No failureGroup B: Cold bending No failure Cross-link proof test (percent, max.) Provided by IHSNot for ResaleNo reproduction or networkin
16、g permitted without license from IHS-,-,-MIL-DTL-24640/4E 4 Jacket 50 Drip (Type TTXWB only) No failure 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
17、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 (conductor insulation, cycles, Method 1 only, min.) Permanence of printing (jacket, cycles, min.) 125 Heat distortion (perce
18、nt of unaged, max.) 30 Cable sealant removability (Type TTXWB only) No failure Shrinkage No failureSurface transfer impedance Milliohms per meter (max.) Not applicable EMP response (dB, min.) Not applicable Group D: Flame propagation No failure Qualification Inspection: Qualification inspection shal
19、l 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.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license f
20、rom IHS-,-,-MIL-DTL-24640/4E 5 Jacket 0.2 Fillers 0.2 Immersion (jacket) Tensile strength (percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index (max.) Jacket 25 Fillers 45Insulation 10Toxicity index (max.) Jacket 5 Fillers 5 Insulation 1.5 Durometer (jacket) - Type A (hard
21、ness, 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 Feet (nominal) All types and sizes 500 CHANGES FROM PREVIOUS ISSUE: Marginal notations are not us
22、ed 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 6145-2009-072) Review Activities: Army AR, AV, CR, CR4 Navy CG, EC DLA CC NOTE: The activities listed above were interested in
23、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-,-,-
