Manual

ELECTRIC WIRING
12-4 TNV IDI Service Manual
Electric Wire Resistance
ELECTRIC WIRE RESISTANCE
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 [Ohms]
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]
AWG
Metric
Nominal mm²
Ohms / Foot
20 0.5 0.009967
18 0.8 0.006340
16 1.25 0.004359
14 2 0.002685
12 3 0.001704
10 5 0.001073
8 8 0.000707
6 15 0.000421
4 20 0.000270
2 30 0.000158
1 40 0.000130
0 (1/0) 50 0.000103
00 (2/0) 60 0.000087
000 (3/0) 85 0.000066
0000 (4/0) 100 0.000051
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