1. GENERAL DATA
A. Phase Identification of Three Phase Power Wires
The phase potential of the three phase power wires that are attached to a single equipment item must
be identified. Refer to Table 1 and Table 2.
These conditions are applicable:
• Each end of the wire must have a phase identification sleeve
• The wire can have one phase identification sleeve if the length of the wire between the
connections is not sufficient for two sleeves.
• It is necessary to install a phase identification sleeve on preinsulated terminals where the
identification sleeve fully includes the terminal insulation.
• On AWG 10 and smaller wire, the end of the phase identification sleeve must extend a maximum
of 1/16 inch past the end of the terminal insulation.
• On AWG 8 and larger wire, install a heat shrinkable phase identification sleeve, or assemble two
or more lacing tape wire harness ties to hold a phase identification sleeve on the PTFE insulation
sleeve of the terminal.
• For Temperature Grade A and B assemblies, it is satisfactory to use one piece of heat shrinkable
sleeve on uninsulated terminals for both the terminal insulation sleeve and the phase
identification sleeve.
• For Temperature Grade C and D assemblies, it is satisfactory to use one piece of M23053/12
Class 2 heat shrinkable sleeve on uninsulated terminals for both the terminal insulation sleeve
and the phase identification sleeve.
• For Temperature Grade C and D assemblies where the terminal lug is installed on the wire, if one
piece of M23053/12 Class 5 thin wall heat shrinkable sleeving is installed as an insulation and a
phase identification sleeve, and the sleeve has damage, replace the sleeve with 2 layers of
M23053/12 class 5 sleeving. If the sleeve does not have damage, add an additional layer of
M23053/12 class 5 sleeving for a total of 2 layers.
• If a cold shrink sleeve is on a terminal or splice, the forward end of the phase identification sleeve
must be against the rearward end of the cold shrink sleeve.
Table 1
PHASE IDENTIFICATION SLEEVES FOR TEMPERATURE GRADES A AND B
Area Temperature
Range
(Degrees F)
Phase Identification
Sleeve
Supplier Phase Color
Less than 275
AMS-DTL-23053/5 Class
1
An available source
A Red
B Yellow
C Blue
Grade B, Class 1 Heat
Shrinkable Sleeve
Refer to Subject 20-00-11.
A Red
B Yellow
C Blue
ELECTRICAL CONNECTION OF EQUIPMENT AND INSTALLATION OF TERMINAL LUGS
707, 727-787
STANDARD WIRING PRACTICES MANUAL
20-30-00
Page 2
Oct 15/2015D6-54446
ECCN 9E991 BOEING PROPRIETARY - See title page for details
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