1、AMSC N/A FSC 6145 Comments, suggestions, or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAI, P.O. Box 3990, Columbus, OH 43218-3990, or email to WireCabledla.mil. Since contact information can change, you may want to verify the currency of this address information
2、using the ASSIST Online database at https:/assist.daps.dla.mil. INCH-POUND MIL-DTL-55040E 4 November 2011 SUPERSEDING MIL-DTL-55040D 5 June 2007 DETAIL SPECIFICATION CABLE, SPECIAL PURPOSE, ELECTRICAL (RETRACTILE) Inactive for new design after 27 October 2000. This specification is approved for use
3、by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type, single conductor, shielded, retractile electrical cable (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of t
4、his specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified
5、requirements documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unl
6、ess otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL STANDARD FED-STD-228 - Cable and Wire, Insulated; Method of Testing. COMMERCIAL ITEM DESCRIPTION A-A-59551 - Wire, Electrical, Copper (Uninsulated) (Copies of these documents are available
7、 online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-55040E 2 2.3 Order of precedenc
8、e. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has
9、 been obtained. 3. REQUIREMENTS 3.1 Conductor. The conductor shall consist of 41 strands AWG (American Wire Gage) No. 40 tin-coated soft copper and shall conform to A-A-59551 (type B, class Q) except that the lay shall be right hand and 0.625 inch (15.88 mm) maximum. 3.1.1 Insulation. The stranded c
10、onductor shall be insulated with a rubber compound conforming to the following physical requirements, before and after accelerated aging in accordance with 4.8.2.4. Original Aged Tensile strength (minimum) pounds per square inch (psi) 600 450 Elongation (minimum), % 250 175 Set (maximum) inch 0.5 -
11、3.1.1.1 Color. The color of the insulation applied over the conductor shall be white. 3.1.1.2 Dimensions. The overall diameter of the insulated conductor shall be 0.060 0.003 inch (1.52 .08 mm) nominal and the wall thickness at any point shall not be less than 0.010 inch (.25 mm). 3.1.2 Shield. A sh
12、ield shall be applied over the primary insulation and shall consist of a minimum 31 strands of AWG No. 36 tin-coated soft copper, layed parallel, helically wound around the insulation with 33 turns minimum per foot. The individual strands shall conform to A-A-59551 (type S). 3.1.3 Jacket. The insula
13、tion and shield shall be jacketed with a smooth compound of terpolymer of ethylene, propylene, and diene conforming to the following physical requirements before and after aging in accordance with 4.8.2.4. Original Aged Tensile strength (minimum) psi 1400 1300 Elongation (minimum),% 350 300 3.1.3.1
14、Color. The color of the jacket shall be black. 3.1.3.2 Dimensions. The overall diameter of the jacket shall be 0.160 0.010 inch (4.06.25 mm) and the wall thickness shall not be less than .025 inch (.64 mm). 3.2 Construction. The jacketed electrical cable shall be helical in form with adjacent turns
15、contiguous to form a helical cable having a straight length of cable on each end tangent to the helical coil. The finished electrical cable shall have a left lay in its helical section. The finished cable shall have a smooth and uniform jacket. The helix diameter shall be 0.560.06 inch (14.22 1.52 m
16、m). The length of the helical portions and the length of the straight ends shall be as specified by the procuring activity (see 6.2). 3.3 Performance. 3.3.1 Conditioning. The electrical cable shall be capable of returning to its original contiguous position after extension of the coiled portion of t
17、he cable to 5 times its retracted length for 6 cycles. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-55040E 3 3.3.2 Life cycle. The cable shall have a life cycle of 5000 cycles when extended to 4 times its retracted length at a rate not les
18、s than 18 cycles per minute (cpm) and shall be capable of returning to within 20% of its original retracted length within one hour after completion of the cycling. The change in resistance of the conductor at any time during the life cycle of the cable shall not exceed 10% of its original resistance
19、. 3.3.3 Extended length. The finished cable shall have a minimum extended length of 2.5 times its retracted length under a load of 6 ounces. 3.3.4 Set. After being extended horizontally to 5 times its retracted length and immediately released, the cable shall return to within 20% of its original len
20、gth within 5 minutes. 3.3.5 Static load. The cable, extended vertically to a length 2.5 times its retracted length for a period of 48 hours, shall return to not more than 115% of its original retracted length within 30 minutes after release from restraint. 3.3.6 Retraction at low temperature. The ca
21、ble shall be capable of being extended to 4 times its retracted length without fracture of the conductor, conductor insulation, or jacket when subjected to the test specified in 4.8.3.6. When released from its extended position, the cable shall retract to not more than 250% of its retracted length w
22、ithin 30 seconds. 3.3.7 Voltage withstand. The electrical cable shall not show any signs of dielectric breakdown when subjected to the tests in 4.8.3.7. 3.3.8 Insulation resistance. The minimum value for insulation resistance shall be 1000 megohms when the cable is subjected to the test in 4.8.3.8.
23、3.4 Workmanship. The cable shall be free of kinks, abrasions, and cracked or peeled surfaces. The cable shall be a uniform and consistent product and shall be free from defects, dirt or foreign substances that adversely affect the serviceability of the product. 3.5 Recycled, recovered, or environmen
24、tally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life-cycle costs. 4. VERIFICATION 4
25、.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Conformance inspection (see 4.2). b. Individual inspection (see 4.5). c. Sampling inspection (see 4.6). d. Periodic inspection (see 4.7). 4.2 Conformance inspection. Conformance inspection sh
26、all consist of the inspections listed in table II. Unless otherwise specified, conformance inspection shall be performed on every lot of cable produced under this specification (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-55040E
27、 4 4.3 Requirements cross-reference matrix. Table I provides a cross-reference matrix of section 3 requirements tested or verified below. TABLE I. Requirements cross-reference matrix. Requirement Verification Requirement Verification 3.1 4.8.1 3.3.1 4.8.3.1 3.1.1 4.8.1, 4.8.2 3.3.2 4.8.3.2 3.1.1.1 4
28、.8.1 3.3.3 4.8.3.3 3.1.1.2 4.8.1 3.3.4 4.8.3.4 3.1.2 4.8.1 3.3.5 4.8.3.5 3.1.3 4.8.1, 4.8.2 3.3.6 4.8.3.6 3.1.3.1 4.8.1 3.3.7 4.8.3.7 3.1.3.2 4.8.1 3.3.8 4.8.3.8 3.2 4.8.1 3.4 4.8.1 4.4 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be conducted under the followin
29、g ambient conditions: 7718 F, site pressure, and site uncontrolled relative humidity. 4.5 Individual inspection. Unless otherwise specified (see 6.2), each cable shall be inspected in accordance with the individual inspections specified in table II. TABLE II. Conformance inspections. Inspection Requ
30、irement Verification Conformance inspections Individual Sampling Periodic Visual they shall be released within 5 seconds. c. Set shall be determined one minute after beginning of release. 4.8.2.4 Accelerated aging. The insulation and jacket shall conform to the minimum aged values of 3.1.1 or 3.1.3,
31、 as applicable, when tested in method 4011 of FED-STD-228, except that the aging period shall be 960.5 hours. 4.8.3 Performance tests. 4.8.3.1 Conditioning. The cable, prior to any extension and retraction tests, shall first be conditioned by extending the coiled portion to 5 times its retracted len
32、gth a total of 6 times and allowing it to retract freely each time. The cable shall then conform to 3.3.1 when laid on a horizontal surface. 4.8.3.2 Life cycle. The resistance of the conductor shall be measured and recorded before start of the cycling test. The cable shall then be clamped in a suita
33、ble testing machine and extended to 4 times its retracted length for 5,000 cycles at a rate of not less than 18 cycles per minute. After completion of the test, the retracted length and resistance values shall be specified in 3.3.2. 4.8.3.3 Extended length. The finished cable shall be positioned ver
34、tically and a load of 6 ounces applied to the end. Measurement under suspension shall conform to 3.3.3. 4.8.3.4 Set. The cable shall be extended to 5 times its retracted length, immediately released, and then measured as specified in 3.3.4. 4.8.3.5 Static load. The finished cable shall be extended b
35、etween two adjustable clamps fastened to a vertical support so that the coiled portion of the cable is stretched to 250% of its original retracted length. After 48 hours, the cable shall be released from its extended position and freed from restraint by tapping on a horizontal surface and laid in a
36、relaxed position. After being placed at rest on the horizontal surface for a period of 30 minutes, the cable shall be measured as specified in 3.3.5. 4.8.3.6 Retraction at low temperature. The finished electrical cable shall be placed in a temperature-controlled chamber for not less than 20 hours at
37、 a temperature of -652 F. At the end of the period and without removal from the chamber, the cable shall be extended to 4 times its retracted length and then released on a horizontal surface. While still at the -65 F temperature, the cable shall be freed from restraint by tapping on the surface and
38、measured as specified in 3.3.6. 4.8.3.7 Voltage withstand. The voltage withstand test shall be conducted in method 6111 of FED-STD-228, with 500 volts dc being applied between the conductor and the shield for a minimum of 5 seconds, as specified in 3.3.7. 4.8.3.8 Insulation resistance. The insulatio
39、n resistance test shall be conducted in method 6031 of FED-STD-228, using a voltage of 500 volts dc, as specified in 3.3.8. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-55040E 7 5. PACKAGING 5.1 Packaging. For acquisition purposes, the pac
40、kaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are main
41、tained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available from the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or b
42、y contacting the responsible packaging activity 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. This specification is being retained as a military detail specification because of environmental requirements,
43、including operation at temperatures to -65 F. The cables procured under this specification will be used for wiring instrument lights on fire control equipment and selected general applications. In use the cable will be subjected to rough handling and extreme weather conditions. Material used in the
44、fabrication of these cables is not intended for extended exposure to oil. 6.2 Acquisition requirements. Acquisition documents should specify the following: a. Title, number, and date of this specification. b. The specific issue of individual documents referenced (see 2.2.1). c. The length of the cab
45、le helical portions, and the length of the straight ends (see 3.2). d. Inspection conditions, if other than as specified (see 4.4). e. Conformance inspections, if other than as specified (see 4.5, 4.6 and 4.7). f. Number of units to be subjected to the periodic test, if other than as specified (see
46、4.7). g. Number of units to be re-inspected upon periodic inspection failure (see 4.7). h. Packaging requirements (see 5.1). 6.3 Subject term (key word) listing. Accelerated aging Helical Life cycle Shield Tensile test Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
47、nse from IHS-,-,-MIL-DTL-55040E 8 6.4 Environmentally preferable material. Environmentally preferable materials should be used to the maximum extent possible to meet the requirements of this specification. As of the dating of this document, the U.S. Environmental Protection Agency (EPA) is focusing
48、efforts on reducing 31 priority chemicals. The list of chemicals and additional information is available on their website at http:/www.epa.gov/osw/hazard/wastemin/priority.htm. Included in the list of 31 priority chemicals are cadmium, lead, and mercury. Use of these materials should be minimized or
49、 eliminated unless needed to meet the requirements specified herein (see section 3). 6.5 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes. CONCLUDING MATERIAL Custodians: Preparing activity: Army - AR DLA - CC DLA CC
