bepmarine.com APPENDIX 97 10% Voltage Drop at 12 Volts Current (Amps) Length 5 10 15 20 25 30 40 50 60 70 80 90 100 10' 3 m 18 18 18 16 16 14 14 12 12 10 10 10 10 15' 5 m 18 18 16 14 14 12 12 10 10 8 8 8 8 20' 6 m 18 16 14 14 12 12 10 10 8 8 8 6 6 25' 8 m 18 16 14 12 12 10 10 8 8 6 6 6 6 30' 9 m 18 14 12 12 10 10 8 8 6 6 6 6 4 40' 12 m 16 14 12 10 10 8 8 6 6 6 4 4 4 50' 15 m 16 12 10 10 8 8 6 6 4 4 4 2 2 60' 18 m 14 12 10 8 8 6 6 4 4 2 2 2 2 70' 21 m 14 10 8 8 6 6 6 4 2 2 2 2 1 80' 24 m 14 10 8 8 6 6 4 4 2 2 2 1 1 90' 27 m 12 10 8 6 6 6 4 2 2 2 1 1 1/0 100' 30 m 12 10 8 6 6 4 4 2 2 1 1 1/0 1/0 110' 33 m 12 8 8 6 6 4 2 2 2 1 1/0 1/0 1/0 120' 36 m 12 8 6 6 4 4 2 2 1 1 1/0 1/0 2/0 130' 40 m 12 8 6 6 4 4 2 2 1 1/0 1/0 2/0 2/0 140' 43 m 10 8 6 6 4 2 2 1 1 1/0 2/0 2/0 2/0 150' 46 m 10 8 6 4 4 2 2 1 1/0 1/0 2/0 2/0 3/0 160' 49 m 10 8 6 4 4 2 2 1 1/0 2/0 2/0 3/0 3/0 170' 52 m 10 6 6 4 2 2 2 1 1/0 2/0 2/0 3/0 3/0 10% Voltage Drop at 24 Volts Current (Amps) Length 5 10 15 20 25 30 40 50 60 70 80 90 100 10' 3 m 18 18 18 18 18 18 16 16 14 14 14 12 12 15' 5 m 18 18 18 18 16 16 14 14 12 12 12 10 10 20' 6 m 18 18 18 16 16 14 14 12 12 10 10 10 10 25' 8 m 18 18 16 16 14 14 12 12 10 10 10 8 8 30' 9 m 18 18 16 14 14 12 12 10 10 8 8 8 8 40' 12 m 18 16 14 14 12 12 10 10 8 8 8 6 6 50' 15 m 18 16 14 12 12 10 10 8 8 6 6 6 6 60' 18 m 18 14 12 12 10 10 8 8 6 6 6 6 4 70' 21 m 16 14 12 10 10 8 8 6 6 6 6 4 4 80' 24 m 16 14 12 10 10 8 8 6 6 6 4 4 4 90' 27 m 16 12 10 10 8 8 6 6 6 4 4 4 2 100' 30 m 16 12 10 10 8 8 6 6 4 4 4 2 2 110' 33 m 14 12 10 8 8 8 6 6 4 4 2 2 2 120' 36 m 14 12 10 8 8 6 6 4 4 2 2 2 2 130' 40 m 14 12 10 8 8 6 6 4 4 2 2 2 2 140' 43 m 14 10 8 8 6 6 6 4 2 2 2 2 1 150' 46 m 14 10 8 8 6 6 4 4 2 2 2 2 1 160' 49 m 14 10 8 8 6 6 4 4 2 2 2 1 1 170' 52 m 12 10 8 6 6 6 4 2 2 2 2 1 1 10% Voltage Drop at 32 Volts Current (Amps) Length 5 10 15 20 25 30 40 50 60 70 80 90 100 10' 3 m 18 18 18 18 18 18 18 16 16 14 14 14 14 15' 5 m 18 18 18 18 18 18 16 14 14 14 12 12 12 20' 6 m 18 18 18 18 16 16 14 14 12 12 12 10 10 25' 8 m 18 18 18 16 16 14 14 12 12 10 10 10 10 30' 9 m 18 18 18 16 14 14 12 14 10 10 10 10 8 40' 12 m 18 18 16 14 14 12 12 10 10 8 8 8 8 50' 15 m 18 16 14 14 12 12 10 10 8 8 8 6 6 60' 18 m 18 16 14 12 12 10 10 8 8 8 6 6 6 70' 21 m 18 14 14 12 10 10 8 8 8 6 6 6 6 80' 24 m 18 14 12 12 10 10 8 8 6 6 6 6 4 90' 27 m 18 14 12 10 10 10 8 6 6 6 6 4 4 100' 30 m 16 14 12 10 10 8 8 6 6 6 4 4 4 110' 33 m 16 14 12 10 10 8 8 6 6 6 4 4 4 120' 36 m 16 12 10 10 8 8 6 6 6 4 4 4 2 130' 40 m 16 12 10 10 8 8 6 6 6 4 4 2 2 140' 43 m 14 12 10 8 8 8 6 6 4 4 2 2 2 150' 46 m 14 12 10 8 8 6 6 6 4 4 2 2 2 160' 49 m 14 12 10 8 8 6 6 4 4 2 2 2 2 170' 52 m 14 12 10 8 8 6 6 4 4 2 2 2 2 Conductors Sized (AWG) for 10% Voltage Drop Use 10% voltage drop for any “non-critical” applications: windlass, cabin lights, etc.... Wire & Cable Technical Data
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