9
APPENDIX Ⅳ12V AC WIRE GAUGE AND
TRANSMISSION DISTANCE RELATION TABLE
It is to recommend max transmission distance when the cable diameter is fixed and the DC 12V
voltage loss rate is lower than 10%. For the DC power supply devices, the max allowed voltage
loss rate is 10%. The cable listed in the table below is copper wire (the resistivity of copper is ρ
=0.0175Ω*mm²/m).
Feet (m)
mm
w
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.8000
1.000
190.83
122.13(37.23)
(58.16)
61.06(18.61)
95.41(29.08)
40.71(12.41)
63.61(19.39)
30.53(9.31)
47.71(14.54)
24.43(7.45)
38.17(11.63)
20.35(6.20)
31.80(9.69)
17.45(5.32)
27.26(8.31)
15.27(4.65)
23.85(7.27)
13.57(4.14)
21.20(6.46)
12.21(3.72)
19.08(5.82)
11.10(3.38)
17.35(5.29)
10.18(3.10)
15.90(4.85)
9.39(2.86)
14.68(4.47)
8.72(2.66)
13.63(4.15)
8.14(2.48)
12.72(3.88)
7.63(2.33)
11.93(3.64)
7.18(2.19)
11.23(3.42)
6.78(2.07)
10.60(3.23)
6.43(1.96)
10.04(3.06)
6.11(1.86)
9.54(2.91)
1.250
298.17
(90.88)
149.08
(45.44)
99.39(30.29)
74.54(22.72)
59.63(18.18)
49.69(15.15)
42.60(12.98)
37.27(11.36)
33.13(10.10)
29.82(9.09)
27.11(8.26)
24.85(7.57)
22.94(6.99)
21.30(6.49)
19.88(6.06)
18.64(5.68)
17.54(5.35)
16.56(5.05)
15.69(4.78)
14.91(4.54)
24
2.000
763.31
(232.66)
381.66
(116.33)
254.44
(77.55)
190.83
(58.16)
152.66
(46.53)
127.22
(38.78)
109.04
(33.24)
95.41
(29.08)
84.81
(28.85)
76.33
(23.27)
69.39
(21.15)
63.61
(19.39)
58.72
(17.90)
54.52
(16.62)
50.89
(15.51)
47.71
(14.54)
44.90
(13.69)
42.41
(12.93)
40.17
(12.25)
38.17
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