NOTE: 277165-1 is no longer manufactured. Refer to Table 3 for alternative part numbers for the
combination of wire sizes shown in Table 2.
Table 3
ALTERNATIVE TRANSITIONAL SPLICE PART NUMBERS FOR AWG 6 CU TO AWG 4 AL
Specified Splice Alternative Splice
Part Number Supplier Part Number Supplier
277165-1 Tyco/Amp 277158-1 Tyco/Amp
Refer to Figure 4.
(1) Find the size of each wire that must have a splice. Refer to the WDM.
(2) Find the conductor material type of each wire that must have a splice. Refer to the WDM and
Subject 20-00-13.
(3) Make a selection of a splice from Table 2, with the first wire to be installed in End A and the
second wire to be installed in End B.
NOTE: Transitional butt splices are designed to be assembled as follows:
• If one wire is aluminum and the other wire is copper, the end of the splice with the blue
ring, End B, is for the copper wire
• If each wire is copper, the end of the splice with the larger wire barrel is for the larger
copper wire.
3. PART NUMBERS AND DESCRIPTION
A. Copalum Splice Part Numbers
Table 4
AMP COPALUM SPLICE PART NUMBERS
Splice Mark on Splice Type Supplier
277156-1 AMP 8 AL - 10 CU Standard Butt AMP/Tyco
277157-1 AMP 6 AL - 8 CU Standard Butt AMP/Tyco
277158-1 AMP 4 AL - 6 CU Standard Butt AMP/Tyco
CONFIGURATION OF A TRANSITIONAL BUTT SPLICE
Figure 4
ASSEMBLY AND REPAIR OF THE AMP AND BACS52N COPALUM SPLICES
707, 727-787
STANDARD WIRING PRACTICES MANUAL
20-30-13
Page 6
Oct 15/2015D6-54446
ECCN 9E991 BOEING PROPRIETARY - See title page for details
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