12 Volt - Electric Automotive Wiring

Maximum wire lengths vs. currents in the 12 volt electrical system of a car.

12 Volt - Electric Automotive Wiring

Maximum wire lengths vs. currents in the 12 volt electrical system of a car.

Current (A)	2% Voltage Drop (ft)	3% Voltage Drop (ft)	5% Voltage Drop (ft)	10% Voltage Drop (ft)
4	41	27	16	8
6	27	18	11	5
8	20	13	8	4
10	16	11	6	3
15	11	7	4	2
20	8	5	3	2
30	5	3	2	1
40	4	3	1	1
50	3	2	1	1
60	2	2	1	1
80	2	1	1	1