Electrical Wire Resistance - Yanmar 3TNV82A Service Manual

ELECTRIC WIRING

ELECTRICAL WIRE RESISTANCE

AWG
Nominal mm²
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]
13-4
Metric Ohms / Foot
Resistance
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 0.000103
60 0.000087
85 0.000066
100 0.000051
Electrical Wire Resistance
TNV DI Service Manual