Battery Cable Size (As a function of current and length)

Mimimum cable size to use (AWG)

System Voltage	Amps	< 5 Ft	5-10 Ft	10-15 Ft	15-20 Ft	20-25 Ft	25-30 Ft
12 Volt	0-60	8 WAG	4 AWG	2 AWG	2 AWG	1 AWG	0 AWG
12 Volt	60-100	6 AWG	4 AWG	1 AWG	0 AWG	0 AWG	2/0 AWG
12 Volt	100-150	4 AWG	2 AWG	0 AWG	2/0 AWG	2/0 AWG	3/0 AWG
12 Volt	150-190	4 AWG	1 AWG	2/0 AWG	3/0 AWG	4/0 AWG	4/0 AWG
12 Volt	190-250	2 AWG	0 AWG	2/0 AWG	4/0 AWG	4/0 AWG	4/0 AWG
12 Volt	250-300	0 AWG	2/0 AWG	3/0 AWG	4/0 AWG	4/0 AWG	4/0 AWG
24 Volt	0-30	14 AWG	14 AWG	10 AWG	8 AWG	8 AWG	6 AWG
24 Volt	30-50	12 AWG	10 AWG	8 AWG	6 AWG	6 AWG	4 AWG
24 Volt	50-75	10 AWG	8 AWG	6 AWG	4 AWG	4 AWG	2 AWG
24 Volt	75-100	6 AWG	6 AWG	4 AWG	4 AWG	2 AWG	1 AWG
24 Volt	100-125	4 AWG	4 AWG	4 AWG	2 AWG	2 AWG	1 AWG
24 Volt	125-150	2 AWG	2 AWG	1 AWG	1 AWG	0 AWG	0 AWG

Notes	1.	Cable length must include both positive and negative cables.
	2:	Maximum acceptable voltage drop = 0.5 volts in a 12 volt system or 1.0 volts in a 24 volt system with ambient temperature surrounding cables is 1500F or less.

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