Doosan DX60R Shop Manual page 440

Reversing the battery cable connections at the battery or on
the engine will destroy the SCR diode in the current limiter.
This will cause the charging system to malfunction and may
cause damage to the electrical harnesses.
Electrical Wire Resistance
Metric Nominal
AWG
20
18
16
14
12
10
8
6
4
2
1
0 (1/0)
00 (2/0)
000 (3/0)
0000 (4/0)
Wiring voltage drop should not exceed 5% [0.05] x 12 Volts =
0.6 Volts.
Voltage Drop = Current [Amps] x Length of Wire [Feet] x
Resistance per Foot Ω
Example:
Current draw of 100 Amps x 3 feet of 4 AWG wire 100 Amps x 3
Feet x 0.000270 = 0.08 Volts [Voltage Drop]
Engine
Page 260
CAUTION
Ohms / Foot
2
Resistance
mm
0.5 0.009967
0.8 0.006340
1.25 0.004359
2 0.002685
3 0.001704
5 0.001073
8 0.000707
15 0.000421
20 0.000270
30 0.000158
40 0.000130
50 0.000130
60 0.000087
85 0.000066
100 0.000051
SP001693