NASA STD 8739.4 PDF

25 Jul NASA TECHNICAL. STANDARD. NASA-STD with Change 5. National Aeronautics and Space Administration. Washington, DC NASA-STD, NASA TECHNICAL STANDARD: CRIMPING, INTERCONNECTING CABLES, HARNESSES, AND WIRING (FEB ) [ SUPERSEDES NAS. NASA-STDA, NASA TECHNICAL STANDARD: CRIMPING, INTERCONNECTING CABLES, HARNESSES, AND WIRING (JUN)., The purpose of.

Author: Akigrel Balrajas
Country: El Salvador
Language: English (Spanish)
Genre: Finance
Published (Last): 8 February 2017
Pages: 362
PDF File Size: 18.27 Mb
ePub File Size: 15.6 Mb
ISBN: 966-2-16405-258-4
Downloads: 75303
Price: Free* [*Free Regsitration Required]
Uploader: Tulmaran

The radial expansion of individual nsa in a stranded conductor bowingoutward that can occur in the exposed portion of the conductor between the insulation strip andtermination point.

Large compression ring grounding or bands. Comments deemed to be spam or questionable spam will be deleted. A single metallic conductor of solid, stranded, or tinsel construction, designed to carrycurrents in an electrical circuit.

MSFC/NASA 8739.4 Cable/Harness Certification Course

Hand probesshall not be used directly in the cable or harness connectors Requirement. Verify that the center contact location nsaa requirements for proper mating. Butt Splice Prior to Crimp Quality Assurance has the responsibility to verify compliance withall requirements of this document.

A flat-surface terminal that is broad compared to the metal thickness. The crimp tool setting which produces themaximum number of fray breaks and breaks outside the contact shall be used for assembly seeNote in Figure Requirement.

All temporary identification shall be removed from eachcompleted harness by the end of the fabrication process Requirement.

NASA-STD-8739.4

The shrinkable sleeving shall firmly grip the item over which it has been installed Requirement. At the end stdd the work shift, protective covering shall be spread overthe harnesses in fabrication Requirement.

The conductor s shall be fully inserted in the crimp barrel, parallel to each other, and withoutmodification to the conductor s or crimp barrel see Figure Requirement.

TOP Related Articles  BIOPSICOLOGIA PINEL PDF

Apply solder so that a fillet forms on both sides of the conductors for theentire length of the area where they overlap and all turns of the wire used to lash the conductorstogether see Figure On terminal junctions and certain insertable crimp-contact connectors, contactsare not exposed for push testing.

Straps shall be tightened so that they do not slide back and forth on theassembly; however, they shall not be so tight as to cause noticeable indentation or distortion ofthe wires in the harness Requirement. Revise Table of Contents to nas insertion of new Chapter 19 and renumbering of existing Chapter 19 Change 3 to Chapter 20 Change 4 – Page xi and xii: An alternative configurationfor the lash splice is the Lash End Type Splice see Figures and Page 94 of Line Drawing of Typical Harness Layout Dimensions from the connector orconnector accessories to start of harness tie are given in Table Electrostatic Discharge Control Program as per paragraph 6.

A mechanical clamp attached to the wire entrance of a connector to support thecable or wire bundle, provide stress relief, and absorb vibration and shock.

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

Supplier training program fails to meet requirements set forth herein or set forth otherwise inthe contract Requirement. A short metal tube used to make crimp connections to shielded or coaxial cables. Your email address will be kept confidential.

Each crimp tool shall have a minimum of four nnasa blades preferably double-indenter blades Requirement. The sleeving may be butted or applied as an open spiral,but shall not be overlapped Figure This description shall include the following, as applicable: Thetooling verification process and the completed termination 879.4 comply with all the requirementsof this document for a crimp termination except as specified herein for jiffy junction devices Requirement.

TOP Related Articles  ANTHOS R7 PDF

An intermediate device to provide for attaching special accessories or to providespecial mounting means.

NASA-STD : Abbott Aerospace SEZC Ltd.

If multiple settings provide identical tensile strengths for acrimp joint, the setting selected shall be the one that provides more wire breaks than wire pull-outs Requirement. Precautions shall be taken to prevent the mismating of connectors, caused by interchanging or byreversing, through one etd the following techniques: Revise list of Figures to reflect insertion Change 5 of new figures as a part of the new Chapter 19 Change 6 – Page xii: Apply heat until the solder ring is fully wetted to the conductorsand the outline of the ring is no longer discernible see Figure Contact surfaces of pinsand sockets and the interior surfaces of the connector shall be free of contaminants Requirement.

Allrework etd meet the requirements of this publication and approved engineering documentation Requirement. You can publish your book online for free in a few minutes! Flat tapes may be leftunder braid if the tape has a low profile. Indentions shall be symmetricaland centered along the longitudinal axis of the crimp barrel Requirement.

They have been updated, improved and the collection has been expanded to cover more analysis methods than ever before.