16
7
APPENDIX
DC 12V WIRE GAUGE AND
TRANSMISSION DISTANCE RELATIONSHIP SHEET
The recommended max transmission distance is under the following environments: The wire
diameter is fixed and the DC 12V power voltage loss rate is below 10%. For the device of DC
power supplying, the max allowed voltage loss rate is 10%. All the wires listed in the following
sheet are copper wire. (Copper wire resistance
)
mm
Feet
δ
m
ε
w
0.8000
1.000
1.250
2.000
5
122.13
37.23
190.83
58.16
298.17
90.88
763.31
232.66
10
61.06
18.61
95.41
29.08
149.08
45.44
381.66
116.33
15
40.71
12.41
63.61
19.39
99.39
30.29
254.44
77.55
20
30.53
9.31
47.71
14.54
74.54
22.72
190.83
58.16
25
24.43
7.45
38.17
11.63
59.63
18.18
152.66
46.53
30
20.35
6.20
31.80
9.69
49.69
15.15
127.22
38.78
35
17.45
5.32
27.26
8.31
42.60
12.98
109.04
33.24
40
15.27
4.65
23.85
7.27
37.27
11.36
95.41
29.08
45
13.57
4.14
21.20
6.46
33.13
10.10
84.81
28.85
50
12.21
3.72
19.08
5.82
29.82
9.09
76.33
23.27
55
11.10
3.38
17.35
5.29
27.11
8.26
69.39
21.15
60
10.18
3.10
15.90
4.85
24.85
7.57
63.61
19.39
65
9.39
2.86
14.68
4.47
22.94
6.99
58.72
17.90
70
8.72
2.66
13.63
4.15
21.30
6.49
54.52
16.62
75
8.14
2.48
12.72
3.88
19.88
6.06
50.89
15.51
80
7.63
2.33
11.93
3.64
18.64
5.68
47.71
14.54
85
7.18
2.19
11.23
3.42
17.54
5.35
44.90
13.69
90
6.78
2.07
10.60
3.23
16.56
5.05
42.41
12.93
95
6.43
1.96
10.04
3.06
15.69
4.78
40.17
12.25
100
6.11
1.86
9.54
2.91
14.91
4.54
38.17
11.63
