Make sure that:
• The edge of the tape is aligned with the end of the wire insulation
• The tape goes around the circumference of the wire a minimum of two times
• The tape makes a 100 percent overlap.
(9) Assemble one end of the butt splice.
(a) Put the splice in the crimp tool.
(b) Hold the splice in position with light pressure.
(c) Put the wires in the splice. Refer to Figure 113.
Make sure that the wires are in the correct position.
(d) Crimp the splice.
(10) Do Step 8.F.(9) again to assemble the other end of the butt splice.
(11) Put three layers of insulation tape on the splice assembly.
(a) Tightly wind the first layer of tape on the splice assembly.
Make sure that the layer:
• Starts at the rear end of the layers of tape on the two wires on one end of the splice
assembly
• Stops at the rear end of the layers of tape on the two wires on the other end of the
splice assembly
• Makes a 50 percent overlap.
(b) Tightly wind the second layer of tape on the splice assembly in the opposite direction of the
first layer.
Make sure that the layer:
• Starts 1 inch minimum farther than where the first layer stops
• Stops 1 inch minimum farther than where the first layer starts
• Makes a 50 percent overlap.
(c) Tightly wind the third layer of tape on the splice assembly in the opposite direction of the
second layer.
Make sure that the layer:
• Starts where the second layer stops
• Stops where the second layer starts
• Makes a 50 percent overlap.
(12) Assemble a lacing tape wire harness tie on each end of the splice assembly approximately 0.25
inch from the end of the tape. Refer to Subject 20-10-11.
Make sure that the Temperature Grade of the lacing tape is Temperature Grade D.
ASSEMBLY OF SPLICES
707, 727-787
STANDARD WIRING PRACTICES MANUAL
20-30-12
Page 140
Jun 15/2021D6-54446
ECCN 9E991 BOEING PROPRIETARY - See title page for details
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