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AC 43.13-1B 9/8/98 TABLE 11-13. Allowable nicked or broken strands. Maximum allowable nicked and broken strands Wire Size Conductor material Number of strands per conductor Total allowable nicked and broken strands 24-14 12-10 8-4 2-1 0-00 000 0000 8-000 Copper or Copper Alloy Aluminum 19 37 133 665-817 1,045-1,330 1,665- 2,109- All numbers of strands 2 nicked, none broken 4 nicked, none broken 6 nicked, 6 broken 6 nicked, 6 broken 6 nicked, 6 broken 6 nicked, 6 broken 6 nicked, 6 broken None, None of the strap would permit wiring to move against parts which could damage the insula- tion and foul mechanical linkages or other moving mechanical parts. They also may not be used where they could be exposed to UV light, unless the straps are resistant to such ex- posure. a. Lacing. Lace wire groups or bundles inside junction boxes or other enclosures. Single cord-lacing method, shown in fig- ure 11-15, and tying tape, meeting specifica- tion MIL-T-43435, may be used for wire groups of bundles 1-inch in diameter or less. The recommended knot for starting the single cord-lacing method is a clove hitch secured by a double-looped overhand knot as shown in figure 11-15, step a. Use the double cord- lacing method on wire bundles 1-inch in di- ameter or larger as shown in figure 11-16. When using the double cord-lacing method, employ a bowline on a bight as the starting knot. b. Tying. Use wire group or bundle ties where the supports for the wire are more than 12 inches apart. A tie consists of a clove hitch, around the wire group or bundle, secured by a square knot as shown in figure 11-17. c. Plastic Ties. Refer to Para- graph 11-220 and table 11-21. 11-159. INSULATION TAPE. Insulation tape should be of a type suitable for the appli- cation, or as specified for that particular use. Insulation tape should be used primarily as a filler under clamps and as secondary support. Nonadhesive tape may be used to wrap around wiring for additional protection, such as in wheel wells. All tape should have the ends tied or otherwise suitably secured to prevent unwinding. Tape used for protection should be applied so that overlapping layers shed liquids. Drainage holes should be provided at all trap points and at each low point between clamps. Plastic tapes, that absorb moisture or have volatile plasticizers that produce chemical re- actions with other wiring, should not be used. (Reference MIL-W-5088.) Page 11-62 Par 11-158PDF Image | AFS-640
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