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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
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.”
11.14.2.6.
Table C: Conductors
Sized (AWG) for 10%
Voltage Drop
Use 10% voltage drop for any
“non-critical” applications: windlass,
cabin lights, etc....
Manage:
Technical Data