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Dahua SD6C230U-HNI - 9 Appendix Ⅲ the Relationship between Ac 24 V Cable; Diameter and Transmission Distance

Dahua SD6C230U-HNI
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28
9 APPENDIX THE RELATIONSHIP BETWEEN AC 24V
CABLE DIAMETER AND TRANSMISSION DISTANCE
It is the recommended max transmission distance when the cable diameter is fixed and the AC
24V power consumption is below 10%. (For the AC power supply devices, the max allowed
voltage loss rate is 10%. For example, a device with rated power 20W, installed 141 feet (42m)
away from the transformer, the needed minimum cable diameter is 0.8000mm).
mm
Feetm
w
0.8000
1.000
1.250
2.000
5
488.52
148.90
763.31
232.66
1192.67
363.53
3053.25
930.63
10
244.26
74.45
381.66
116.33
596.34
181.76
1526.62
465.31
15
162.84
49.63
254.44
77.55
397.56
121.18
1017.75
310.21
20
122.13
37.23
190.83
58.16
298.17
90.88
763.31
232.66
25
97.70
29.78
152.66
46.53
238.53
72.71
610.65
186.13
30
81.42
24.82
127.22
38.78
198.78
60.59
508.87
155.10
35
69.79
21.27
109.04
33.24
170.38
51.93
436.18
132.95
40
61.06
18.61
95.41
29.08
149.08
45.44
381.66
116.33
45
54.28
16.54
84.81
25.85
132.52
40.39
339.25
103.40
50
48.85
14.89
76.33
23.27
119.27
36.35
305.32
93.06
55
44.41
13.54
69.39
21.15
108.42
33.05
277.57
84.60
60
40.71
12.41
63.61
19.39
99.39
30.29
254.44
77.55
65
37.58
11.45
58.72
17.90
91.74
27.96
234.87
71.59
70
34.89
10.64
54.52
16.62
85.19
25.97
218.09
66.47
75
32.57
9.93
50.89
15.51
79.51
24.24
203.55
62.04
80
30.53
9.31
47.71
14.54
74.54
22.72
190.83
58.16
85
28.74
8.76
44.90
13.69
70.16
21.38
179.60
54.74
90
27.14
8.27
42.41
12.93
66.26
20.20
169.62
51.70
95
25.71
7.84
40.17
12.25
62.77
19.13
160.70
48.98
100
24.43
7.45
38.17
11.63
59.63
18.18
152.66
46.53

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