Table C: Conductors Sized (AWG) for
10% Voltage Drop
Use 10% voltage drop for any “noncritical applications: windlass, cabin lights, etc....
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|
| |
|
|
10% VOLTAGE DROP AT 12 VOLTS |
|
Length
|
5
|
10
|
15
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
90
|
100
|
|
|
|
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
10 |
|
|
18 |
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
8 |
|
|
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
|
|
18 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
|
|
18 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
|
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
4 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
|
14 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
2 |
1 |
|
|
14 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
1 |
1 |
|
|
12 |
10 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
1 |
1 |
0 |
|
|
12 |
10 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
1 |
1 |
0 |
0 |
|
|
12 |
8 |
8 |
6 |
6 |
4 |
2 |
2 |
2 |
1 |
0 |
0 |
0 |
|
|
12 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
1 |
1 |
0 |
0 |
2/0 |
|
|
12 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
1 |
0 |
0 |
2/0 |
2/0 |
|
|
10 |
8 |
6 |
6 |
4 |
2 |
2 |
1 |
1 |
0 |
2/0 |
2/0 |
2/0 |
|
|
10 |
8 |
6 |
4 |
4 |
2 |
2 |
1 |
0 |
0 |
2/0 |
2/0 |
3/0 |
|
|
10 |
8 |
6 |
4 |
4 |
2 |
2 |
1 |
0 |
2/0 |
2/0 |
3/0 |
3/0 |
|
|
10 |
6 |
6 |
4 |
2 |
2 |
2 |
1 |
0 |
2/0 |
2/0 |
3/0 |
3/0 |
| |
|
|
10% VOLTAGE DROP AT 32 VOLTS |
|
Length
|
5
|
10
|
15
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
90
|
100
|
|
|
|
18 |
18 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
14 |
12 |
12 |
|
|
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
12 |
10 |
10 |
|
|
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
10 |
|
|
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
8 |
8 |
|
|
18 |
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
8 |
|
|
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
|
|
18 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
|
|
18 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
|
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
4 |
|
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
2 |
|
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
4 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
|
14 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
2 |
2 |
2 |
2 |
1 |
|
|
14 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
1 |
|
|
14 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
1 |
1 |
|
|
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.
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| |
|
|
10% VOLTAGE DROP AT 32 VOLTS |
|
Length
|
5
|
10
|
15
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
90
|
100
|
|
|
|
18 |
18 |
18 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
14 |
14 |
|
|
18 |
18 |
18 |
18 |
18 |
18 |
16 |
14 |
14 |
14 |
12 |
12 |
12 |
|
|
18 |
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
12 |
10 |
10 |
|
|
18 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
10 |
10 |
|
|
18 |
18 |
18 |
16 |
14 |
14 |
12 |
14 |
10 |
10 |
10 |
10 |
8 |
|
|
18 |
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
8 |
|
|
18 |
16 |
14 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
|
|
18 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
6 |
|
|
18 |
14 |
14 |
12 |
10 |
10 |
8 |
8 |
8 |
6 |
6 |
6 |
6 |
|
|
18 |
14 |
12 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
6 |
4 |
|
|
18 |
14 |
12 |
10 |
10 |
10 |
8 |
6 |
6 |
6 |
6 |
4 |
4 |
|
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
|
16 |
14 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
|
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
4 |
2 |
|
|
16 |
12 |
10 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|
|
14 |
12 |
10 |
8 |
8 |
6 |
6 |
4 |
4 |
2 |
2 |
2 |
2 |
|