Figure 4: Electric wire chart

Electric Wire Chart Wire Size 20 18 16 14 12 10 8 6 4 2 1 1/0 2/0 3/0 4/0 20 18 16 14 12 10 8 6 4 2 1 1/0 2/0 3/0 4/0 Curves: 1. Continuous rating-amperes cables in conduit and bundles 2. Continuous rating-amperes single cable in free-air 3. Intermittent rating-amperes maximum of 2 minutes Curve 1 Curve 2 Curve 3 1 1.5 2 3 4 5 6 78910 15 20 30 40 50 60 708090100 125 150 175 200 300 400 Amperes Circuit Voltage Voltage Drop 115 200 14 28 800 100 200 600 75 150 400 700 50 100 360 630 45 90 320 560 40 80 280 490 35 70 240 420 30 60 200 350 25 50 160 280 20 40 120 210 15 30 100 175 12 25 80 140 10 20 72 120 9 18 64 112 8 16 56 98 7 14 48 84 6 12 40 70 5 10 36 63 4 9 32 56 8 28 49 7 24 42 3 6 20 35 2 5 4 7 .5 1 Wire length in feet for allowable voltage drop