Major League Duning | Tech | Wire Gauge Table

A basic wire gauge selection table for wiring your 12 volt vehicle. These are the minimum recommended wire gauges for the current indicated, I always try to use a size that is one or two larger than the minimum.

WIRE GAUGE SELECTION TABLE
Remember: Amps x Volts = watts, or Watts/Volts = Amps
Amps	Watts	Length of wire in feet, recommended wire gauge
12V	12V	3'	5'	7'	10'	15'	20'	25'
0 to 2.5	30	18	18	18	18	18	18	18
3.0	36	18	18	18	18	18	18	16
3.5	42	18	18	18	18	18	18	16
4.0	48	18	18	18	18	18	16	16
5.0	60	18	18	18	18	16	16	16
5.5	66	18	18	18	18	16	16	14
6.0	72	18	18	18	18	16	16	14
7.5	90	18	18	18	18	14	14	12
9.0	108	18	18	16	16	14	14	12
10	120	18	18	16	16	14	12	10
11	132	18	18	16	16	12	12	10
12	144	18	18	16	16	12	12	10
15	180	18	16	16	14	10	10	10
20	240	18	16	14	12	10	10	8
25	300	16	14	12	12	10	10	8
50	600	12	12	10	10	6	6	4
75	900	10	10	8	8	4	4	2
100	1200	10	8	8	6	4	4	2