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DC WIRE SIZING CHART
Stranded Conductors for 12 Volt Circuits
10% Voltage Drop
A.
Society of Aut.omotive Engin.eers Type Wire
B.
National Electrical
Code Type
Wire
Wire
Sl~e
Standing
Circular
~II
Area
Circuit
Curre-nt
In AMPS
I.
2-
3.
••
5.
••
7.
O.
9.
'0.
'5.
20.
3D.
'0.
50.
55.
60.
75.
90.
'0
,.
14
'2
'0
0
•
•
,.
14
'2
'0
0
0
•
2
,
'6X3D
,
....
1511(27 19x2S
,.x2:\
19:a1 "9x23
.. ax21
,.
"
"
,.
,.
37
Bl
127
127
1537
2336 3702 5833
93<13 14810 25910
37360
.503
.'07
6530
10380
16510
26250 4'740
66370
.3690
Maxim. um Lengt.h of Cond uclor
'n
Feet.
fro:tn Power Source t.o Load and Return
'"
26D
.0.
17
130
"0
330
,
..
227
SS
".7
,
..
'21)
....
,.,
240
43.7
B'
' D .
16.
26 •
71
113
'00
285
34.7
52
. .
132
2'0
57
57
143
232
3
'3.3
70
110
175
270
47.3
75.3
,21)
,
. .
3D3
2".7
37
eo
••
'50
240
40.7
".7
103
,
. .
26D
21.7
32.7
52.7
82.7
'31
210
35.3
58.3
89.6
,
. .
227
<19.3
28.7
.S.7
73.3
11.
18.
300
31.7
SQ.3
70.'
'27
202
321
17.3
26
'2
66
,os
,
. .
271
28.3
'5.3
7.
".
'8'
2 ••
'7.3
2 •
. .
70
112
'80
2.5
,.
3D
••
7.
12'
"3
3D6
.,
33
52.7
03.7
135
211
22.7
3.
57
9'
,
. .
230
22
3.
58
90.3
,
. .
..
""
60.7
96.3
'53
2'3
306
26.3
. .
.7.3
'07
2'.3
'5.3
72
".
'.2
23D
2'
33.7
54
1S.3
23
36.3
57.7
92
14'
'84
30.7
4.
77.7
33
'2.3
83.3
133
,67
45
7'.3
••
76.3
121
'53
36
57
-«7.3
38.3
.,
97.3
'23
The volt.age drop for specific conductor len.gths :Lnay be calculated. by the formuhc:
Volt.a.ge drop
10.75
x
I
%
L
CM
I
=
loa.d in amperes
where:
L
=
conductor length in feet
eM
=
conductor circular MIL area
'When a circuit, including t.he ground return. uses several different si%e conduct.ors.
t.he voltage drop at the elect.rical device is the
SUIn
of t.he drops calculated for each
si%e segment of the circuil.
"
81
27
WESTERBEKE GENERATORS
'02
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