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C1473M-C (4/05) 11
Table A.
Video Coaxial Cable Requirements
*Cable requirements:
75 ohms impedance
All-copper center conductor
All-copper braided shield with 95% braid coverage
The following are the recommended maximum distances for 24 VAC applications and are calculated with a 10 percent voltage drop. (Ten percent
is generally the maximum allowable voltage drop for AC-powered devices.)
Table B.
24 VAC Wiring Distances
Cable Type* Maximum Distance
RG59/U 750 ft (229 m)
RG6/U 1,000 ft (305 m)
RG11/U 1,500 ft (457 m)
Wire Gauge
Total
VA
20
(0.5 mm
2
)
18
(1.0 mm
2
)
16
(1.5 mm
2
)
14
(2.5 mm
2
)
12
(4.0 mm
2
)
10
(6.0 mm
2
)
10 283
(86)
451
(137)
716
(218)
1142
(348)
1811
(551)
2880
(877)
Maximum distance from transformer to load
20 141
(42)
225
(68)
358
(109)
571
(174)
905
(275)
1440
(438)
30 94
(28)
150
(45)
238
(72)
380
(115)
603
(183)
960
(292)
40 70
(21)
112
(34)
179
(54)
285
(86)
452
(137)
720
(219)
50 56
(17)
90
(27)
143
(43)
228
(69)
362
(110)
576
(175)
60 47
(14)
75
(22)
119
(36)
190
(57)
301
(91)
480
(146)
70 40
(12)
64
(19)
102
(31)
163
(49)
258
(78)
411
(125)
80 35
(10)
56
(17)
89
(27)
142
(43)
226
(68)
360
(109)
90 31
(9)
50
(15)
79
(24)
126
(38)
201
(61)
320
(97)
100 28
(8)
45
(13)
71
(21)
114
(34)
181
(55)
288
(87)
110 25
(7)
41
(12)
65
(19)
103
(31)
164
(49)
261
(79)
120 23
(7)
37
(11)
59
(17)
95
(28)
150
(45)
240
(73)
130 21
(6)
34
(10)
55
(16)
87
(26)
139
(42)
221
(67)
140 20
(6)
32
(9)
51
(15)
81
(24)
129
(39)
205
(62)
150 18
(5)
30
(9)
47
(14)
76
(23)
120
(36)
192
(58)
160 17
(5)
28
(8)
44
(13)
71
(21)
113
(34)
180
(54)
170 16
(4)
26
(7)
42
(12)
67
(20)
106
(32)
169
(51)
180 15
(4)
25
(7)
39
(11)
63
(19)
100
(30)
160
(48)
190 14
(4)
23
(7)
37
(11)
60
(18)
95
(28)
151
(46)
200 14
(4)
22
(6)
35
(10)
57
(17)
90
(27)
144
(43)