crimping, interconnecting cables, harnesses, and wiring - NASA

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Page 44 of 114 NASA-STD-8739.4 with Change 6 punctured or slit to provide openings for breakout (Requirement). After installation, braided sleeving shall be secured or treated in one of the following ways to eliminate fraying or unraveling (Requirement). Figure 9-7. Securing Fabric Braid Sleeving 9.3.1 Braided sleeving may be secured by a spot tie or plastic cable strap. The end of the braid shall be tucked under and secured with a spot tie or plastic strap (Figure 9-7) (Requirement). 9.3.2 The end of the braid may be secured by connector clamps, other hardware, or potting. 9.3.3 The ends of glass braids may be bonded using an adhesive. Excessively frayed material shall be trimmed away prior to application of the adhesive (Requirement). When the adhesive is dry, the braid shall be secured by spot tying or other means so that it does not slip on the wire bundle (Requirement). 9.3.4 Polyamide (nylon) braids (for use on ground service equipment) may have their ends sealed by use of a "hot knife" or similar instrument. 9.4 Fabric Braid Directly Woven on Interconnecting Harness or Cable Fabric braids woven directly on interconnecting harnesses or cables may be loose or tight, as necessary to produce the degree of flexibility required. The braid shall be smooth and shall provide coverage that leaves no gaps through which the wires can be seen (Requirement). No frayed ends shall be visible (Requirement). All pigtails shall be secured (Requirement). Braids applied tightly shall not terminate so close to connectors that they stress wires attached to solder cups (Requirement). Spot ties, plastic straps, lacing, and other temporary holding means shall be removed from wire bundles prior to braid application (Requirement). Flat tapes may be left under braid if the tape has a low profile. Typical braiding techniques are shown in Figures 9-8, 9-9, and 9-10.
Figure 9-8. Starting Lock Figure 9-9. Forming Ending Pigtail TRIM OFF PIGTAIL Figure 9-10. Braiding at a Breakout or Y Intersection Page 45 of 114 NASA-STD-8739.4 with Change 6
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(4) Mating surfaces and coupling me
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(10) Tarnished, corroded, or contam
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WIRE PREPARATION: MECHANICAL STRIPP
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FIGURE A-25 FIGURE A-26 CRIMPS: INS
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FIGURE A-29A CRIMPS: UNACCEPTABLE P
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crimping, interconnecting cables, harnesses, and wiring - NASA

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