07导线捆扎.doc

CCAR-66部基本技能培训教材Cable lacing（导线捆扎） 编号：02-MULT-071. General description.12. Single ties.13. Double-cord lacing64. Intervals for wire harness ties95. Tie materials.96. Note97. Plastic Tie Strap Wire Harness Ties.108. Wire harnesses with coax cable 111. General descriptionTwo types for wire harness ties: Lacing tapes Plastic tie strapsSingle-cord lacing: use for cable bundles 1 in. (2.54cm) in diameter or less.Double-cord lacing: require for large cable bundles.2. Single ties:2.1 Description:u A tie has two knots A clove hitch knot A square knot or a surgical knot2.2 Procedure:2.2.1 Method(A): not in the high vibration areaThe locked clove hitch is used. The clove hitch is formed and it is then locked with a square knot.Step 1:Step 2:2.2.2 Method(B): Make ties on high vibration or excessive heat area.Vibration LevelType1Not a high vibration area2A high vibration area3A high vibration areaStep to make a clove hitch knot on the high vibration area.Complete the clove hitch on the harness and make sure that the knot is tight.Step 1: make a clove hitch on the harness. Make sure that the knot is tight.Step 2: A square knot or a surgical knot is used to prevent the unwanted movement of a clove hitch on the harness.Step 3: Cut the two ends of the material so that the distance between the ends of the materials is 0.25 in. to 0.5 in.3. Double-cord lacing3.1 DescriptionUse for large cable bundles. The method is basic the same to the single-cord lacing.3.2 Procedure3.2.1 Method (A): Step one: The first loop is made with a special type of slip knot similar to the “bowline-on a bight”. Step two: Make a square knot or surgical knot on top of the clove hitch knot. Step three: The free end of the lacing cord should be trimmed to approximately 3/8 in. (0.95cm).3.2.2 Method (B):Tie a square knot.4. Intervals for wire harness ties: Maximum 2 inches in a high vibration area ,high level 3 Maximum 6-8 inches in a high vibration area ,high level 2And:The numbers of wire harness ties is necessary to make sure that: the wires harness does not bend between the wire harness ties; the outer diameter of the wire harness does not become larger between the wire harness ties;5. Tie materials:Class 1: Resistant to BMS3-11 fluidClass 2: not Resistant to BMS3-11 fluid6. Note: a) The part of a wire group or bundle located inside a conduit is not tied or laced, but wire groups or bundles inside enclosures, such as junction boxes, should be laced only and laced at frequent intervals.b) All wire group or bundles should be tied where supports at more than 12 in. apart.c) Whether laced or tied, bundles should be secured to prevent slipping, but not so tightly that the cord cuts into or deforms the insulation.Figure: a branch with wires come from opposite directions7. Plastic Tie Strap Wire Harness Ties not permitted:- In a fuel tank- In the unpressurized area- In a high vibration area; - On a wire harness that has a Temperature Grade C or Temperature Grade D- Where a broken tie strap can let the wire harness move against an abrasive surface- Where a broken tie strap can let the wire harness cause an interference with mechanical linkage. alternative to lacing tape wire harness ties when -