Solar System Wire Gauge Sizing Reference Chart

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Wire Size Selection Chart

Circuit Length Circuit Type Current Flow in Amps
10% Voltage Drop (Non-Critical) 3% Voltage Drop (Critical) 5A 10A 15A 20A 25A 30A 40A 50A 60A 70A 80A 90A 100A
10 ft. 30 ft. 10 ft. 16 AWG 14 AWG 12 AWG 12 AWG 10 AWG 8 AWG 8 AWG 6 AWG 6 AWG 4 AWG 4 AWG 2 AWG
20 ft. 50 ft. 15 ft. 14 AWG 12 AWG 10 AWG 8 AWG 8 AWG 6 AWG 4 AWG 2 AWG 1 AWG 0 AWG 2/0 AWG 3/0 AWG
30 ft. 65 ft. 20 ft. 14 AWG 12 AWG 10 AWG 8 AWG 6 AWG 4 AWG 2 AWG 1 AWG 0 AWG 2/0 AWG 3/0 AWG 4/0 AWG
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