NASA TECHNICAL NASA-STD 8739.4A STANDARD with Change 1 Approved: 2016-06-30 National Aeronautics and Space Administration Superseding NASA-STD-8739.4 Washington, DC 20546 With Change 6 WORKMANSHIP STANDARD FOR CRIMPING, INTERCONNECTING CABLES, HARNESSES, AND WIRING Measurement System Identification: Metric (English) NASA-STD-8739.4A – 2016-06-30 DOCUMENT HISTORY LOG Document Approval Status Description Revision Date Baseline 1998-02-08 Initial Release - Page iii: Update URL for accessing NASA Technical Standards. The correct URL is http://standards.nasa.gov/ - Page iii: Update references to NASA 5300.4(3J-1) and NASA 5300.4(3M) to NASA-STD- 8739.1 and NASA-STD-8739.2 respectively. - Page iv: Insert Revisions page and renumber Table of Contents accordingly. - Para 2.1 Change citation for NHB 8060.1 to NASA- STD-6001 and change citation for NHB 1700.1(V1) to NPR 8715.3. - Para 3.2 Delete NHB from Acronym List and Add NPR to acronym list - Para 4.3 No. 4: Change sentence to “Crimping. Stranded wire shall be used for crimping. Crimping of solid wire is prohibited. Crimping of solder tinned stranded wire is prohibited.” - Para 5.7: Change address for training center to: GSFC, Training Center, Code 300.1, 7000 Columbia Gateway Dr., Columbia, MD. 21046 Change 1 2006-01-27 - Para 6.8: Change sentence to read: “All materials used in vacuum or low pressure shall not release greater than 1.0 percent total mass loss (TML) and 0.1 percent collected volatile condensable material (CVCM) when tested in accordance with ASTM-E- 595.” - Para 6.8: Change NHB 8060.1” to “NASA-STD- 6001” in the second sentence. - Para 7.3 No. 11 Change NHB 8060.1 to NASA- STD-6001 - Para 9.7: Change tape “may be applied to bundle” to “shall be applied to bundle”. - Para 14.1 Change NHB 1700.1 to NPR 8715.3 - Para 18.2 No. 6.c: For the Insulation Resistance (IR) Test, change “for a minimum of 1 minute, or as specified in the test procedure” to “until a stabilized reading is attained not to exceed 1 minute, or as specified in the test procedure.” - Appendix C Update the address for submitting changes to NASA Technical Standards (WHBIII) 2 of 101 NASA-STD-8739.4A – 2016-06-30 Document Approval Status Description Revision Date - Page v: Insert Revisions page entries - Page ix: Revise Table of Contents to reflect insertion of new Chapter 19 and renumbering of existing Chapter 19 to Chapter 20 - Page xi and xii: Revise list of Figures to reflect insertion of new figures as a part of the new Chapter 19 Change 2 2006-08-23 - Page xii: Revise List of Tables to reflect insertion of new tables as a part of the new Chapter 19 - Pages 19-1 through 19-14: Inserted new Chapter on Splicing - Pages 20-1 through 20-10: Renumbered original Quality Assurance Provisions Chapter to accommodate the new Splicing Chapter (WHBIII) Correct page number formatting problem and add Change 3 2006-09-05 page numbers (no content changes) (WBHIII) Update references, add ‘requirement’ tags, and Change 4 2008-07-25 revalidate (JWL4) Editorial corrections to paragraphs 6.4, 12.3.4.c, 13.7.3, 18.2.6.b, and footnote #1 to Table 12-1. Change 5 2009-11-24 Addition of SMA TA note on cover and VCS note below. (JWL4) Editorial corrections to Foreword and paragraphs 9.5 and 15.1. Format Page numbers. Add reference to Change 6 2011-03-29 NASA-STD 8709.22 in paragraphs 2.1.2 and 3.2. (JWL4) - Editorial corrections to adopt current NASA Standard format. - Synchronized requirements with NASA-STD- 8739.6 - Added and removed documents from reference lists. - Unused acronyms deleted. Revision A 2016-06-30 - Corrected applicability statement. - Supersede the training chapter with the current requirements found in NASA-STD-8739.6. - Update definitions for Accessory, Connector and Backshell. - Defer to NASA-STD 8709.22 for definitions for Repair and Rework. 3 of 101 NASA-STD-8739.4A – 2016-06-30 Document Approval Status Description Revision Date - Remove definitions for Solder Cup Terminal and Tab Terminal. - Defined high voltage applications as those supporting voltage in excess of 200VACRMS or 300VDC. - Removed requirement for magnetic survey for uses of high strength copper alloy wire. - Added a requirement to specify wire dress and lay in drawings. - Include launch vehicles in applications where spiral wrapped sleeving is prohibited. - Remove contradictory rules regarding pull test failures. - Remove ambiguous, duplicate information from Table 12-1 for crimp pull acceptance criteria. - Remove requirements related to crimp process development and include only pre-production process verification pull testing requirements. - Require that instructions are provided to operators when outgassing connector subcomponents (e.g. grommets and gaskets) are to be removed during cable assembly. - Synchronized requirements with adoption of J- STD-001FS - Remove requirement to record break type for passing crimp test samples for contacts and crimp ring quality control testing. - Remove limitation of requirement to inspect captured solder cup interconnects to hermetic connector and extend it to all connectors with captured solder cup contacts. - Require process controls to ensure full solder fill of solder contacts. - Defer to engineering documentation for required torque values. - Added requirement to bake expanded foam insulated cable following cleaning. - Prohibit use of aqueous cleaning on silver-plated copper wire. - Removed requirement to protect finished harnesses with bubble wrap. - Require venting of packaging used to store assemblies containing fluoropolymer insulation. - Added metric units to splice pull values (JFP) 4 of 101 NASA-STD-8739.4A – 2016-06-30 Document Approval Status Description Revision Date - Corrected referencing in paragraphs: 9.9.2 and 11.3.3. Deleted first sentence “(Figure 11-6D)” and second sentence “(Figure 11-6E)” in paragraph 11.4.2. Changed “in advance in accordance with 1.4.3 or 1.4.4” to “in advance in accordance with Chapter 4 of NASA-STD-8739.6” in paragraph 12.3.5.d and “handled in accordance with paragraph 4.4.” to “handled in accordance with paragraph 6.8 of NASA-STD-8739.6” in paragraph 19.2.1. Deleted paragraph 19.6.1.d, changed “shall be used based on 19.11.1.c below” to “shall be selected per the requirements of Chapter 12 herein” in paragraph 19.10.1. Corrected format for Figure 19-26 and 19-27, changed “requirements specified in 10.1.11.b for each” to “requirements Change 1 2016-10-07 specified in 10.1.4.b for each” in paragraph 19.12.1.e. Added letters after 20.1.8 instead of numbers and “Use” to the beinning of the 20.1.8.c. Changed “approve in accordance with 1.4 by the procuring” to “approved in accordance with Chapter 4 or NASA-STD-8739.6 by the procuring” in paragraph 20.3.1 and “found in paragraphs 6.3, 6.6, and 12.3” to “found in paragraphs 6.2 and 12.3 in paragraph 20.4.1.” Changed “the requirements of paragraphs 6.8 and 6.9 and that material” to “the requirements of paragraphs 6.5 and 6.6 and that material” in paragraph 20.4.3 and “described in Chapters 1 through 18, Appendix” to “described in Chapters 1 through 19, Appendix” in paragraph 20.5.1. (JFP) 5 of 101 NASA-STD-8739.4A – 2016-06-30 6 of 101 NASA-STD-8739.4A – 2016-06-30 TABLE OF CONTENTS DOCUMENT HISTORY LOG ................................................................................................... 2 TABLE OF CONTENTS ............................................................................................................. 7 LIST OF APPENDICES .............................................................................................................. 9 LIST OF FIGURES .................................................................................................................... 10 LIST OF TABLES ...................................................................................................................... 12 1. SCOPE .......................................................................................................................... 13 1.1 Purpose ........................................................................................................................... 13 1.2 Applicability .................................................................................................................. 13 2. APPLICABLE DOCUMENTS ................................................................................... 13 2.1 General ........................................................................................................................... 13 2.2 Government Documents ................................................................................................ 13 2.3 Non-Government Documents ........................................................................................ 14 2.4 Order of Precedence ....................................................................................................... 14 3. ACRONYMS AND DEFINITIONS ........................................................................... 14 3.1 Acronyms and Abbreviations ........................................................................................ 14 3.2 Definitions...................................................................................................................... 16 4. REQUIREMENT ......................................................................................................... 20 4.1 General ........................................................................................................................... 20 5. TRAINING AND CERTIFICATION PROGRAM .................................................