5 Cable Diameter (24V AC) and
Transmission Distance
13
The recommended transmission distances are for reference only, and the actual
conditions shall prevail. The following table shows the maximum transmission
distance of cables with certain diameter when the 24V AC power source voltage
loss rate is below 10%.
For devices powered by alternating current, the maximum voltage loss rate
allowed is 10%. For example, when a device of 20W rated power is installed 122
feet (37 m) away from the transformer, the minimum diameter needed is
0.80mm.
In the following table, the unit for diameter is mm, and the unit for transmission
distance is foot (m).
Table 5-1 Cable diameter (24V AC) and transmission distance
Transmission
Power (W)
Transmission
Distance
(Diameter:
0.80)
Transmission
Distance
(Diameter:
1.00)
Transmission
Distance
(Diameter:
1.25)
Transmission
Distance
(Diameter:
2.00)
5
489
(1
49
)
763
(2
33)
1193
(
364
)
3053
(
931
)
10
244
(
74
)
382
(11
6)
596
(1
8
2)
1527 (
465
)
15
163
(50)
254
(77)
398
(121)
101
8
(
3
10)
20
122 (
37
)
191
(
58
)
298
(
91
)
763
(2
33
)
25
98
(
30
)
152 (
47
)
239
(
73
)
611
(1
86
)
30
81
(25)
127 (
39
)
199
(
61
)
509
(155)
35
70 (21)
109
(
33
)
170 (52)
436
(1
33
)
40
61
(
19
)
95
(
29
)
149
(
45
)
382
(11
6
)
45
54
(
16
)
85
(
26
)
133
(
41
)
339
(10
3
)
50
49
(15)
76
(
23
)
119
(
36
)
305
(
93
)
55
44
(
13
)
69
(21)
108
(
33
)
278
(
85
)
60
41
(12)
64
(20)
99
(
30
)
254
(77)
65
38
(12)
59
(
18
)
92
(
28
)
235
(72)
70
35
(11)
55 (17)
85
(
26
)
218
(
66
)
75
32
(10)
51 (
16
)
80
(
24
)
204
(
62
)
80
31
(
9
)
48
(15)
75 (
23
)
191
(
58
)
85
29
(
9
)
45
(
14
)
70 (21)
180
(55)
90
27 (
8
)
42
(
13
)
66
(20)
170 (52)
95
26
(
8
)
40
(12)
63
(
19
)
161
(
49
)
100
24
(7)
38
(12)
59
(
18
)
153
(
47
)
