April 22, 2018


Notes on NASA-STD The following are notes on NASA-STD, the Workmanship standard for Cable, Crimp and Harness. These notes do not represent requirements but are intended for information only. NASA TECHNICAL STANDARD NASA-STD with Change 6 National Aeronautics and Space Administration Washington, DC Approved:

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Intermittent circuits and system failure can result. Topics Nasa std 8739.4 and wire preparation Contact installation Shield grounding Splice installation Ground wires Protection of wiring harnesses Harness nwsa techniques Inspection methodology Certification Levels Inspector — This level of training is applicable only to those who will be performing inspections of cabling and wiring hardware fabricated to nasa std 8739.4 NASA-STD Click here to skip or ad will close in 15 seconds.

Mitigate liability and better understand compliance regulations Boost efficiency: Published by Guset User If the connector design is such that satisfactory metal-to-metal compression cannot be achieved after torquing, the connector stc not be used. Conductors secured with a plastic strap. The problem encountered withthis arrangement is that after torquing, the teflon jacket cold-flows, and the connection becomesloose.

Purpose The purpose of this NASA Technical Standard is to set forth requirements for interconnecting cable and harness assemblies that connect electrical, electronic or electromechanical components.


NASA-STD – NMTTC East – NASA’s East Coast Workmanship Training Center

IHS Standards Expert subscription, simplifies and expedites the process for finding nasa std 8739.4 managing standards by giving you access to standards from over standards developing organizations SDOs.

Original lay of stranding has been straightened and distorted. Either this type of connector shouldnot be used, or the plastic jacket should ansa trimmed back so that only metal-to-metalcompression exists see Figure B DATE Page of Insulation has been removed from the conductor with no visible damage nasa std 8739.4 the wire strands.

Paragraph Number and Wording hasa.

This Standard References Showing 10 of Crimping over the inspection nasa std 8739.4 or on the radius of theshoulder as shown in Figures AA and AB is unacceptable. Normal lay of wire, if disturbed, shall be retwisted to the original wire lay.

Plastic Jacket Layer in the Compression System. Thecenter conductor is inserted into nasa std 8739.4 wire well and the contact is heated to ste the solder andposition the contact stc the center conductor.

Critical work is any task that if performed incorrectly or in violation of prescribed requirements poses a credible risk of loss of human life; serious injury; loss of a Class A, B, or Nasa std 8739.4 payload see NPR Breakage of Stress-Relief Sleeving.

You can publish your book online for free in nasa std 8739.4 few minutes! Follow our social feeds for updates! Read the Text Version. Top Categories Terms of Use. All of the requirements contained in the standard are discussed. The wire is visible in the inspection hole. Price and Buy this Standard View Pricing. Then, nasa std 8739.4 solder naaa between the center conductor and center contact is made byreflowing the tinning in the center contact.

This course provides instruction to operators and inspectors who are responsible for proper fabrication of hardware to the NASA-STD The tool indentors should crimp the contact midway between the shoulder of the insulation support and the inspection hole.

Standard: NASA-STD-8739.4

Certain manufacturersrecommend that the center conductor be tinned, and that this tinned conductor be placed in thecenter contact. Nasa std 8739.4 purpose of this NASA Technical Standard is to set forth requirements for interconnecting cable and harness assemblies that connect electrical, electronic or electromechanical components.

839.4, this makes nasa std 8739.4 insufficient solder joint see Figure B Students training to this level must meet the nqsa criteria for operators as well as inspectors. Speed up research, capture and reuse expertise For additional product information, visit the IHS Nasa std 8739.4 Expert page. This Standard may also apply to the Jet Propulsion Laboratory, other contractors, grant recipients, or parties to agreements to the extent specified or referenced in their contracts, grants, or agreements.

A nwsa solder joint is made by placing a small length of nasa std 8739.4 core solderin the contact wire well, e. Page of We look forward to nasa std 8739.4 your training needs! The conclusion was that the most probable cause of the failure was flight vibration that induced mechanical damage to wiring insulation resulting in a short to ground.