1、 MIL-DTL-49285/14A 31 March 2010 SUPERSEDING MIL-C-49285/14 19 October 1989 DETAIL SPECIFICATION SHEET CABLE, SPECIAL PURPOSE, ELECTRICAL, ONE INDIVIDUALLY SHIELDED PAIR OF 20 (7 X 28) AWG This specification is approved for use by all Departments and Agencies of the Department of Defense. The requir
2、ements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-49285. Engineering information: See table I. Note: Not for aerospace use. TABLE I. Description, electrical. Electrical characteristics Requirements Nominal capacitance between conductors Nominal c
3、apacitance between the conductor and the shield with one conductor tied to the shield Continuous working voltage Shield dc resistance 27 pF/ft (picofarads/foot) 49 pF/ft 300 V rms maximum between conductors 9.3 ohms/1,000 feet maximum AMSC N/A FSC 6145 INCH-POUND Inactive for new design after 16 Jun
4、e 1997. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-49285/14A 2 TABLE II. Description, physical. Components Construction details Number of pairs Conductor type and wire size Conductor stranding Conductor insulation Conductor insulation th
5、ickness Drain wire type and size Drain wire stranding Jacket material Jacket thickness Finished cable diameter Cable style (UL) Tensile strength (jacket) Elongation (jacket) Overall cabling lay length One individually shielded Stranded tinned copper 20 AWG 7 X 28 AWG Polypropylene 0.016 inch nominal
6、 thickness Stranded tinned copper 20 AWG 7 X 28 AWG Polyvinyl chloride 0.026 inch 0.214 inch maximum outside diameter 2092 2,000 pounds per square inch minimum 150 percent minimum 8.0 twists per foot 10 percent REQUIREMENTS: Design and construction: (see table II): Shield color code. The shield colo
7、r shall be blue. Shield location and orientation. The polyester aluminum shield is to be located on the outer circumference of the pair, with the aluminum foil side outward. Insulation on the interior of the shield is to be complete with no aluminum available for contact. Drain wire location. The dr
8、ain wire is to be spirally located between the shield and jacket, and is to be in continuous contact with the aluminum surface of the foil shield throughout the cable. Cable temperature rating. The cable temperature rating shall be -20C to +80C. Conductor color coding. The first conductor is black,
9、the second conductor is natural (clear). Shield integrity test.* Frequency Response * 100 kHz 115 dB below reference 500 kHz 106 dB below reference 1 MHz 98 dB below reference 5 MHz 80 dB below reference Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
10、MIL-DTL-49285/14A 3 10 MHz 71 dB below reference 15 MHz 66 dB below reference 20 MHz 61 dB below reference 25 MHz 57 dB below reference 30 MHz 54 dB below reference * Any two readings may deviate to a value of 0.9 times the stated limits. * All values are a minimum numerical value. Fixture resonan
11、ce will occur between 40 and 70 MHz. At 100 MHz: At least 41 dB below reference. Flammability. The cable shall pass UL 2556 flame test requirements. Crosstalk test limits. Crosstalk testing is not required for this configuration. Durometer hardness. The cable jacket shall have a “Shore A” hardness o
12、f 82 5. Part or Identifying Number (PIN): The PIN shall be M49285/14. Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability
13、 whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Referenced documents. This document references MIL-
14、DTL-49285 and UL 2556. CONCLUDING MATERIAL Custodians: Preparing activity: Army CR DLA - CC Navy SH Air Force 85 DLA - CC Review activities: Army MI (Project 6145-2009-018) Air Force 99 DLA IS 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-,-,-
