NOTE: A satisfactory alternative for an uninsulated butt splice and sleeves on more than one wire is
an insulated butt splice on more than one wire. Refer to Paragraph 6.C.
(1) Make a selection of an uninsulated butt splice from Table 12 or Table 14.
Make sure that the splice has the smallest CAU size that can accept the total CAU of the
conductors. Refer to Paragraph 1.D. for the procedure to calculate the CAU of the conductors.
(2) Find the crimp barrel size of the splice from Table 12 or Table 14.
(3) Make a selection of a crimp tool from Table 43.
(4) Make a selection of a Temperature Grade B heat shrinkable sleeve from Table 51.
Make sure that the sleeve has the smallest diameter that can be put on the wires and the splice.
NOTE: For alternative heat shrinkable sleeves, refer to Subject 20-00-11.
(5) Cut a 4.0 inch ±0.2 inch length of the sleeve.
(6) Cut one more piece of sleeve that is 2.4 inches ±0.2 inch in length.
(7) Put the sleeves on the end of one of the wires.
(8) Remove the necessary length of insulation from the end of each wire.
Refer to:
• Figure 35
• Table 65 for the insulation removal length
• Subject 20-00-15 for the insulation removal procedures.
(9) Assemble one end of the butt splice:
(a) Put the splice in the crimp tool.
(b) If the splice has a seam, align the seam opposite the indenter. Refer to Figure 36.
INSULATION REMOVAL LENGTH
Figure 35
ASSEMBLY OF SPLICES
707, 727-787
STANDARD WIRING PRACTICES MANUAL
20-30-12
Page 77
Feb 15/2021D6-54446
ECCN 9E991 BOEING PROPRIETARY - See title page for details
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