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1、MIL-U-29606 999990b L9L44b 479 m MIL-W-29606 30 Auqust 1994 MILITARY SPECIFICATION WIRE, ELECTRICAL, STRANDED, UNINSULATED COPPER, COPPER ALLOY, OR ALUMINUM, OR THERMOCOUPLE EXTENSION, GENERAL SPECIFICATION FOR This specification i s approved f o r use by a l l Departments and Agencies o f the Depar
2、tment o f Defense. 1. SCOPE 1.1 Scope. This specification covers concentric l a y stranded and rope- l a y stranded round electrical conductor fabricator from copper, copper a l l o y o r aluminum. This specification also covers thermocouple extension conductor fabricated from nickel /chromium o r n
3、ickel/al uminum/manganese. The conductors i n t h i s specification are suitable f o r use i n insulated wires used i n aerospace and other applications. 1.2 Classification. Stranded conductors shall be classified herein. The classification shall be by: Conductor Materi al Conductor Stranding Conduc
4、tor Coating Conductor Dimensions 1.2.1 M i l i t a r y part number desisnation. Examp - 4 - “- I I Basic Part No. Conductor Conductor e: Conductor (1.2.1 2) Coat i ng To1 erance (1.2.1.3) (1.2.1.4) (1.2.1.1) Size Material and D i ameter The above conductor i s a size 20 conductor o f silver coated a
5、nnealed copper conductor with general purpose diameter control. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use i n improving this document should be addressed to: Commanding Officer, Naval A i r Warfare Center Aircraft Division Lakehurst, Syste
6、ms Requirements Department (Code SR33), Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document improvement Proposal (DD Form 1426) appearing at the end o f t h i s document o r by l e t t e r . AMSC N I A FSC 6145 DISTRIBUTION STATEMENT A. Approved for public release; distrib
7、ution i s unlimited. MIL-W-29bOb m 99999Ob I198l1447 305 MIL-W-29606 1.2.1.1 Basic part number. The conductor military part number shall consist of the letter “M,“ the basic number of the applicable specification and the applicable alpha-numeric characters formulated in the example (see 1.2.1). 1.2.
8、1.2 Conductor size. A one- or two-digit designator from Table II shall be used to designate the conductor size. 1.2.1.3 Conductor material and coatinq desiqnator. An alphabetic designator from Table I shall be used to designate the conductor material and conductor coating. 1.2.1.4 Conductor diameter
9、 tolerance. The conductor diameter dimensional to1 erance shall be designated as fol 1 ows : GP - General Purpose (see Table 11). SD - Small Diameter (see Table II). Note: The GP conductors shall be inactive for new design for copper and copper alloy conductors. All conductors without a distinct dia
10、meter tolerance (GP or SD) shall be designated as general purpose (GP) diameter tolerance conductors. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specification, standards, and handbooks form a part of this document t o the extent specified here
11、in. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department o f Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited i n the solicitation (see 6.2). SPECIFICATIONS MI L ITARY MIL-C-3993 - STANDARDS FEDERAL FED-STD-228
12、- Copper and Copper-Base Alloy Mill Products; Packaging of. Cable and Wire, Insulated; Methods of Testing 2 MIL-W-29606 M I L ITARY MIL-STD-105 - Sampling Procedures and Tables f o r Inspection by MIL-STD-109 - Qual i ty Assurance Terms and D e f i n i t ions MIL-STD-202 - Test Methods f o r Electro
13、nic and Electrical MIL-STD-45662 - Calibration Systems Requirements. Attributes. Components Parts. (Unless otherwise indicated, copies o f federal and m i l i t a r y specifi- cations, standards and handbooks are available from the DODSSP - Customer Service, Building 40, 700 Robbins Avenue, Philadel
14、phia, PA 19111-5094.) 2.2 Non-Government publications. The following document(s) form a part Unless otherwise specified, o f t h i s document t o the extent specified herein. the issues o f the documents which are DOD adopted are those l i s t e d i n the issue o f the DODISS cited i n the solicitat
15、ion. the issues o f documents not l i s t e d i n the DODISS are the issues o f the documents cited i n the solicitation (see 6.2). Unless otherwise specified, AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-A380 - Standard Practice f o r Cleaning and Descal ing ASTM-B33 - Wire, Tinned Soft o
16、 r Annealed Copper, f o r ASTM-B230 - Aluminum 1350 - H19 Wire f o r Electrical Purposes. ASTM-B263 - Determination o f Cross-Sectional Area o f Stranded ASTM-B298 - Wire, Copper, Silver-Coated Soft o r Annealed. (DoD ASTM- B3 5 5 - Nickel Coated Soft o r Annealed Copper Wire. (DoD ASTM- B6 24 - Wir
17、e Copper Alloy, High Strength, High Stainless Steel Parts, Equipment, and Systems. (DoD adopted) Electrical Purposes. (DoD adopted) (DoD adopted) Conductors. (DoD adopted) adopted) adopted) Conductivity, f o r Electronic Application. (DoD adopted) (Application for copies should be addressed t o the
18、American Society f o r Testing and Materials (ASTM), 1916 Race Street, Philadelphia, PA 19103-1137.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI-MC96.1 - Temperature Measurement Thermocouples. 3 MIL-U-29606 = 9999906 3981449 188 MIL-W-29606 (Application for copies should be addressed to the Am
19、erican National Standards Institute, 11 West 42nd Street, N e w York, NY 10036.) 2.3 Order of precedence. In the event of a conflict between the text o f this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicabl
20、e laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Detail specification. The individual item requirements shall be as specified herein and in accordance w i t h the ASTM or ANSI document when applicable. In the event of any conflict between requirements of this
21、 specification and the ASTM or ANSI standards (see 2.2), this specification chal 1 govern. 3.1.1 First article. When specified (see 6.2), a sample shall be subjected to f i r s t article inspection (see 6.3) in accordance w i t h 4.4. 3.2 Conductor strand material. All strands used i n conductors sp
22、ecified herein shall conform to the applicable ASTM or ANSI standards for the proper material listed in Table I . Strands shall be free from lumps, kinks, splits, scraped or corroded surfaces, and skin impurities. In addition, the strands shall conform t o the following requirements as applicable. 3
23、.2.1 Tin coated copper strands (type TCC). The t i n coating shall be as specified in ASTM-B33. 3.2.2 Silver coated copper strands (type SCC). The strands shall have a coating thickness of not less than 40 microinches of silver when measured in accordance w i t h ASTM-B298. 3.2.3 Nickel coated coppe
24、r strands (type NCC). The strands shall have a coating thickness of not less than 50 microinches of nickel when measured i n accordance w i t h ASTM-B355. 3.2.4 Heavy nickel coated copper strands (type NHC) . The copper strands shall have a coating thickness of not less than 27 percent by weight of
25、nickel when measured in accordance with ASTM-B355. 3.2.5 Silver coated copper alloy strands (type SCA). The copper alloy strand base material shall conform to ASTM-B624. The strands shall have a coating thickness o f not less than 40 microinches o f silver when measured in accordance w i t h ASTM-B2
26、98. 3.2.6 Nickel coated copper alloy strands (type NCA). The copper alloy strand base material shall conform t o ASTM-6624. The strands shall have a coating thickness of not less than 50 microinches o f nickel when measured in accordance w i t h ASTM-B355. 4 NIL-W-2bOb = 7Ob L98LY50 T T W MIL-W-2960
27、6 3.2.7 Heavy nickel coated comer strands (type NHA) The copper alloy strand base material shall conform t o ASTM-B624. The copper strands shall have a coating thickness o f not less than 27 percent by weight o f nickel when measured i n accordance with ASTM-B355. 3.2.8 Silver coated ultra-hiqh stre
28、nqth cower alloy strands (type SCU). The ultra-high strength copper alloy strands shall be made o f a copper alloy material capable o f meeting a l l requirements herein. The strands shall have a coating thickness o f not less than 40 microinches o f silver when measured i n accordance with ASTM-B29
29、8. 3.2.9 Nickel coated ultra-hiqh strenqth comer alloy strands (type NCUL. The ultra-high strength copper alloy strands shall be made o f a copper alloy material capable o f meeting a l l requirements herein. The strands shall have a coating thickness o f not less than 50 microinches o f nickel when
30、 measured i n accordance with ASTM-6355. 3.2.10 A l umi num strands ( t m e ALU). The al uminum strand materi a l shall conform t o ASTM-B230. 3.2.11 Type K Thermocouple Extension Conductor (Type KPH, KPS, KNH, and KNS). Type KPH and KPS strands shall be made from an alloy o f 90 percent nickel - 10
31、 percent chromium and type KNH and KNS strands shall be made from an alloy o f 95 percent nickel - 2 percent aluminum - 2 percent manganese - 1 percent silicon and minor traces o f other materials and shall conform t o ANSI- MC96. I. 3.3 Conductor strandinq. Conductor stranding shall be i n accordan
32、ce with Tables I I - A thorugh II-F. No metallic coatings o r platings are permitted over the stranded conductor after stranding. 3.3.1 Concentric strandinq. The conductors with 7, 19, or 37 strands shall be concentric-lay stranded as specified i n Table II. lay shall be alternately reversed (true c
33、oncentric lay) o r i n the same direction (unidirectional lay). The strands shall be assembled in a geometric arrangement o f concentric 1 ayers, producing a smooth and uniform conductor, circular i n cross-section and free o f any crossovers of adjacent strands, high strands, o r other irregulariti
34、es. The direction o f lay o f the individual strands i n the outer layer o f the concentrically stranded conductors o f the finished wire shall be l e f t hand. The length o f lay o f the outer layer shall be 8-16 t i m e s the maximum conductor diameter as specified i n Table II. The direction o f
35、be rope-lay shall be l a more layers layers shal 3.3.2 RoDe-lay strandinq. The conductors with more than 37 strands shall stranded as specified i n Tab1 e I I. d up concentrically with a central member surrounded by one o r o f helically wound members. be alternately reversed (true concentric lay),
36、or i n the same Rope-1 ay stranded conductors The direction o f lay o f successive 5 MIL-W-29bOb MIL-W-29606 direction (unidirectional lay). The length of the lay of the outer layer of rope-lay stranded conductor shall be 8-14 times the outside diameter of the completed conductor. either left or rig
37、ht hand. The direction of lay of the outside layer shall be 3.3.2.1 RoDe-lay members. The individual members of the rope-lay stranded conductors may be either bunched or concentric stranded. The length of lay of the stranded members shall not be greater than 16 times the outside diameter of the memb
38、er. 3.4 Splices. For conductor types TCC, SCC, NCC, NHC, SCA, NCA, NHA, SCU, and NCU, splices in individual strands or members shall be butt brazed or welded. There shall not be more than one strand-splice in any two lay lengths of a stranded concentric-lay conductor or i n any two lay lengths of an
39、y member i n a rope-lay conductor, except that not more than one splice o f the entire member shall be permitted in any two lay lengths of a rope- ay conductor. Splices i n members of a rope-lay construction shall be so f nished that the In no case shall conductor diameter is not increased a t the p
40、oint of joining the whole conductor be spliced a t any one point. For conductor type ALU, splices i n individual strands shall not be closer than Splices i n members of rope-lay constructions shall two lay lengths- f member-. not be closer than 10 feet. In no case shall the whole conductor be splice
41、d a t any one point. For conductor types KPH, KPS, KNH, and KNS, splices i n individual strands or groups of individual strands shall be butt brazed w i t h silver solder. Splices shall be so constructed and disposed throughout the conductor that the diameter, configuration, conductor resistance, fl
42、exibility, and mechanical strength of the completed conductor are not adversely affected. 3.5 Properties of individual strands before stranding. The individual strands must comply t o the ASTM or ANSI requirements when applicable (see Table I ) , and the plating thickness requirements for the specif
43、ic conductor. 3.6 Properties of stranded conductors. 3.6.1 Conductor diameter. The diameter o f the conductor shall be as specified i n Table I I . Applicability of the “general purpose“ or of the “small diameter“ Table I I requirements for the maximum conductor diameter shall be as indicated by the
44、 part number. All measurements shall fall within the specified range. The diameter shall be measured in accordance with 4.6.2. All conductors without a distinct diameter tolerance (GP or SD) shall be designated as general purpose (GP) diameter tolerance conductors as specified in 1.2.1. 6 -,-,- MIL-
45、W-27bOb 9979906 1981452 772 MIL-W-29606 3.6.2 Solderability. The stranded conductor shall have a minimum Solderability requirements are not applicable t o aluminum, coverage o f 95 percent when examined after testing t o the method specified i n 4.6.3. thermocouple extension, o r nickel coated condu
46、ctors. 3.6.3 Elonsation. The elongation o f the entire conductor shall be measured on size 22 and smaller annealed copper, and size 20 and smaller copper alloy conductors. from the stranded constructions shall be measured on larger sizes o f annealed copper, copper alloys, and a l l sizes o f alumin
47、um. The minimum elongation shall be not less than the values i n Table II as measured i n accordance with 4.6.4. Elongation requirements are not applicable t o thermocouple extension conductors. Elongation measurements on single strands removed 3.6.4 Tensile strenqth. The break strength of a l l cop
48、per a l l o y conductors shall be measured. The minimum break strength shall not be less than the values i n Table II. shall be as specified i n Table II. strength on the annealed copper conductors and thermocouple extension conductors. The tensile strength o r break strength shall be measured i n a
49、ccordance with 4.6.4. Tensile strength values o f aluminum conductors There are no requirements f o r tensile 3.6.5 Conductor resistance. The DC resistance o f the conductor shall be not greater than the values i n Table I I as measured i n accordance with 4.6.5. I n addition, f o r thermocouple extension conductors only, the DC resistance o f the conductor shall be greater than the minimum values i n Table II as measured i n accordance with 4.6.5. 3.6.5.1 Electromotive force (thermocouple extension conductor only)-. The te