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How to read electric wire code
• In the electrical circuit diagram, material, thickness and color of each electric wire are indicated by
symbols. The wire code is helpful in understanding the electrical circuit diagram.
Example) AEX 0.85 L: Indicates blue, heat-resistant, low-voltage wire for automobile, having nominal No. of
0.85
Indicates type of wire by symbol.
Type, symbol, and material of wire are shown in Table 1.
AEX
(Since the use of AV and AVS wires depends on size (nominal No.), their symbols are not
indicated on the diagram.)
Indicates size of wire by nominal No.
0.85
Size (Nominal No.) is shown in Table 2.
Indicates color of wire by color code.
L
Color codes are shown in Table 3.
Type, symbol, and material
• AV and AVS are different in thickness and outside diameter of the coating. CAVC has a circular
compressed conductor. It differs from AV and AVS in the outside diameter of conductor and thickness of
the coating. And AEX is similar to AV in thickness and outside diameter of the coating but different from AV
and AVS in material of the coating.
(Table 1)
Sym-
Type
bol
Low-voltage
wire for
AV
automobile
Thin-cover
low-voltage
wire for
AVS
automobile
(Type 1)
Thin-cover
low-voltage
wire for
CAVS
automobile
(Type 2)
Heat-
resistant low-
voltage wire
AEX
for
automobile
WA320-7
(ALL-E500-030-P-00-A)
Conductor
Insulator material
material
Soft polyvinyl chloride
Annealed
copper for
electric
appliance
Heat-resistant cross
linked polyethylene
00 Index and foreword
Foreword, safety and general information
Temperature
Example of use
range (°C) in
use
For large current wiring
(nominal No. 5 and above)
General wiring
(nominal No. 3 and lower)
-30 to +60
For mid- to small-size
excavators
(nominal No. 1.25 and lower)
General wiring for extremely
cold weather specification
-50 to +110
Wiring at high ambient
temperature place
(Rev. 2012/10)
00-43
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