7 APPENDIX Ⅲ Ⅲ Ⅲ Ⅲ 24V AC Cable Diameter and Transmission
Distance Relationship
It is the recommended transmission distance when the cable diameter is fixed and the 24V
AC power consumption is below 10%. For the AC device, the max permission voltage power
consumption is 10%. For example, when a device of rated power 20W installed from the
transformer 141 inches (42m), then the min cable diameter is 0.8000mm.
mm
Feet
(
m
)
w
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.8000
488.52
763.31
(
1 48.90
)
(
2 32.66
244.26
381.66
(
7 4.45
)
(
1 16.33
162.84
254.44
(
4 9.63
)
(
7 7.55
122.13
190.83
(
3 7.23
)
(
5 8.16
152.66
97.70
(
2 9.78
)
(
4 6.53
127.22
81.42
2 4.82
(
)
(
3 8.78
109.04
69.79
2 1.27
(
)
(
3 3.24
61.06
(
1 8.61
)
95.41
54.28
(
1 6.54
)
84.81
48.85
(
1 4.89
)
76.33
44.41
1 3.54
69.39
(
)
40.71
(
1 2.41
)
63.61
37.58
(
1 1.45
)
58.72
34.89
1 0.64
54.52
(
)
32.57
(
9 .93
)
50.89
30.53
(
9 .31
)
47.71
28.74
(
8 .76
)
44.90
27.14
(
8 .27
)
42.41
25.71
(
7 .84
)
40.17
24.43
7 .45
38.17
(
)
1.000
1.250
1192.67
)
(
3 63.53
)
596.34
)
(
1 81.76
)
397.56
)
(
1 21.18
)
298.17
)
(
9 0.88
)
238.53
)
(
7 2.71
)
198.78
)
(
6 0.59
)
170.38
)
(
5 1.93
)
149.08
(
2 9.08
)
(
4 5.44
)
132.52
(
2 5.85
)
(
4 0.39
)
119.27
(
2 3.27
)
(
3 6.35
)
108.42
2 1.15
(
)
(
3 3.05
)
(
1 9.39
)
99.39
(
3 0.29
(
1 7.90
)
91.74
(
2 7.96
1 6.62
85.19
2 5.97
(
)
(
(
1 5.51
)
79.51
(
2 4.24
(
1 4.54
)
74.54
(
2 2.72
(
1 3.69
)
70.16
(
2 1.38
(
1 2.93
)
66.26
(
2 0.20
(
1 2.25
)
62.77
(
1 9.13
1 1.63
59.63
1 8.18
(
)
(
12
2.000
3053.25
(
9 30.63
)
1526.62
(
4 65.31
)
1017.75
(
3 10.21
)
763.31
(
2 32.66
)
610.65
(
1 86.13
)
508.87
(
1 55.10
)
436.18
(
1 32.95
)
381.66
(
1 16.33
)
339.25
(
1 03.40
)
305.32
(
9 3.06
)
277.57
8 4.60
(
)
)
254.44
(
7 7.55
)
)
234.87
(
7 1.59
)
218.09
6 6.47
)
(
)
)
203.55
(
6 2.04
)
)
190.83
(
5 8.16
)
)
179.60
(
5 4.74
)
)
169.62
(
5 1.70
)
)
160.70
(
4 8.98
)
152.66
4 6.53
)
(
)