Komatsu PC500LC-10R, Shop Manual, Page: 57 / 758

HOW TO READ ELECTRICAL WIRE CODE
In the electrical circuit diagram, the material, thickness, and color of each electric wire are indicated by symbols.
The electrical wire code is helpful in understanding the electrical circuit diagram.
Example) AEX 0.85 L: Indicates heat-resistant, low-voltage blue wire for automobile, having nominal No. of 0.85
AEX
Indicates type of wire by symbol.
Type, symbol, and material of wire are shown in (Table 1).
(Since the use of AV and AVS wires depends on size (nominal No.), the symbols are not indicated on
the diagram.)
0.85
Indicates size of wire by nominal No.
Sizes (Nominal Nos.) are shown in (Table 2).
L
Indicates color of wire by color code.
Color codes are shown in (Table 3).
Type, symbol, and material
AV and AVS are different in only thickness and outside diameter of the coating. CAVS has a circular com-
pressed conductor. It differs from AV and AVS in the outside diameter of conductor and thickness of the coating.
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)
Type
Sym-
bol
Conductor ma-
terial
Insulator material
Temperature
range (°C) in
use
Example of use
Low-voltage
wire for auto-
mobile
AV
Annealed cop-
per for electric
appliance
Soft polyvinyl chloride -30 to +60
For large current wiring
(nominal No. 5 and above)
Thin-cover
low-voltage
wire for auto-
mobile
(Type 1)
AVS
General wiring
(nominal No. 3 and lower)
Thin-cover
low-voltage
wire for auto-
mobile
(Type 2)
CAVS
For mid- to small-size excava-
tors
(nominal No. 1.25 and lower)
Heat-resistant
low-voltage
wire for auto-
mobile
AEX
Heat-resistant cross-
linked polyethylene
-50 to +110
General wiring for extremely
cold weather specification
Wiring at high-temperature
place
00 INDEX AND FOREWORD HOW TO READ ELECTRICAL WIRE CODE
PC500LC-10R 00-55