Table C: Conductors Sized (AWG) for
10% Voltage Drop
Use 10% voltage drop for any “noncritical applications: windlass, cabin lights, etc....
|
|
| |
Current (amps) |
|
10% VOLTAGE DROP AT 12 VOLTS |
|
Length
|
5
|
10
|
15
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
90
|
100
|
|
|
10’
|
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
10 |
|
15’
|
18 |
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
8 |
|
20’
|
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
|
25’
|
18 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
|
30’
|
18 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
|
40’
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
50’
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
4 |
2 |
2 |
|
60’
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
70’
|
14 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
2 |
1 |
|
80’
|
14 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
1 |
1 |
|
90’
|
12 |
10 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
1 |
1 |
0 |
|
100’
|
12 |
10 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
1 |
1 |
0 |
0 |
|
110’
|
12 |
8 |
8 |
6 |
6 |
4 |
2 |
2 |
2 |
1 |
0 |
0 |
0 |
|
120’
|
12 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
1 |
1 |
0 |
0 |
2/0 |
|
130’
|
12 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
1 |
0 |
0 |
2/0 |
2/0 |
|
140’
|
10 |
8 |
6 |
6 |
4 |
2 |
2 |
1 |
1 |
0 |
2/0 |
2/0 |
2/0 |
|
150’
|
10 |
8 |
6 |
4 |
4 |
2 |
2 |
1 |
0 |
0 |
2/0 |
2/0 |
3/0 |
|
160’
|
10 |
8 |
6 |
4 |
4 |
2 |
2 |
1 |
0 |
2/0 |
2/0 |
3/0 |
3/0 |
|
170’
|
10 |
6 |
6 |
4 |
2 |
2 |
2 |
1 |
0 |
2/0 |
2/0 |
3/0 |
3/0 |
| |
Current (amps) |
|
10% VOLTAGE DROP AT 32 VOLTS |
|
Length
|
5
|
10
|
15
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
90
|
100
|
|
|
10’
|
18 |
18 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
14 |
12 |
12 |
|
15’
|
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
12 |
10 |
10 |
|
20’
|
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
10 |
|
25’
|
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
8 |
8 |
|
30’
|
18 |
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
8 |
|
40’
|
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
|
50’
|
18 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
|
60’
|
18 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
|
70’
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
4 |
|
80’
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
90’
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
2 |
|
100’
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
4 |
2 |
2 |
|
110’
|
14 |
12 |
10 |
8 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
|
120’
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
130’
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
140’
|
14 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
2 |
1 |
|
150’
|
14 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
1 |
|
160’
|
14 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
1 |
1 |
|
170’
|
12 |
10 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
2 |
1 |
1 |
|
| ABYC Recommends… “Conductors used for panelboard or switchboard main feeders, bilge blowers, electronic equipment, navigation lights, and other circuits where voltage drop must be kept to a minimum, shall be sized for a voltage drop not to exceed three percent. Conductors used for lighting, other than navigation lights, and other circuits where voltage drop is not critical, shall be sized for a voltage drop not to exceed 10 percent.” 11.16.1.2.7. |
|
| |
Current (amps) |
|
10% VOLTAGE DROP AT 32 VOLTS |
|
Length
|
5
|
10
|
15
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
90
|
100
|
|
|
10’
|
18 |
18 |
18 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
14 |
14 |
|
15’
|
18 |
18 |
18 |
18 |
18 |
18 |
16 |
14 |
14 |
14 |
12 |
12 |
12 |
|
20’
|
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
12 |
10 |
10 |
|
25’
|
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
10 |
|
30’
|
18 |
18 |
18 |
16 |
14 |
14 |
12 |
14 |
10 |
10 |
10 |
10 |
8 |
|
40’
|
18 |
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
8 |
|
50’
|
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
|
60’
|
18 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
6 |
|
70’
|
18 |
14 |
14 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
6 |
6 |
|
80’
|
18 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
|
90’
|
18 |
14 |
12 |
10 |
10 |
10 |
8 |
6 |
6 |
6 |
6 |
4 |
4 |
|
100’
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
110’
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
120’
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
2 |
|
130’
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
2 |
2 |
|
140’
|
14 |
12 |
10 |
8 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
|
150’
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
|
160’
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
170’
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
