Recommended Wire Gauges

Maximum Current Load in Amperage Gauge of Copper Conductor Maximum Cord Length with 5% Voltage Drop Typical Service Length Approx. % Voltage Drop for Typical Service Length
7 18 65 ft. 100 ft. (9%)
10 16 71 ft. 100 ft. (6%)
15 14 75 ft. 125 ft. (8%)
20 12 90 ft. 125 ft. (6%)
25 10 115 ft. 150 ft. (6%)
35 8 130 ft. 150 ft. (5%)
45 6 158 ft. 200 ft. (6%)
60 4 188 ft. 200 ft. (5%)