Cable Diameter (24V AC) and Transmission Distance 31
Cable Diameter (24V AC) and
Appendix 3
Transmission Distance
It is the recommended transmission distance for the fixed-sized cable with attrition rate lower
than 10% of 24V AC. The Maximum attrition rate of voltage allowed for AC power supply is 10%.
For example, when a device of rated power 20 W is installed from the transformer at the
distance of 141 inches (42 m), then the Min. cable diameter is 0.8000 mm.
Transmission
Power
Consumption (W)
Cable Diameter (mm)
0.8000
1.000
1.250
2.000
Transmission Distance Feet (m)
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)
