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4 C1465M-A (9/06)
*Cable requirements:
75 ohms
All-copper center conductor
All-copper braided shield with 95-percent braid coverage
EXAMPLE: An enclosure that requires 30 VA and is installed 94 feet (28 m) from the transformer would require a minimum wire gauge of
20 AWG.
NOTE: Distances are calculated feet; values in parentheses are meters.
Table A. Video Coaxial Cable 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)
Table B. 24 VAC Wiring Distances
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.)
Wire Gauge
Total VA
22
(0.4 mm
2
)
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
178
(54)
283
(86)
451
(137)
716
(218)
1142
(348)
1811
(551)
2880
(877)
Maximum distance from
transformer to load
20
89
(27)
141
(42)
225
(68)
358
(109)
571
(174)
905
(275)
1440
(438)
30
59
(17)
94
(28)
150
(45)
238
(72)
380
(115)
603
(183)
960
(292)
40
44
(13)
70
(21)
112
(34)
179
(54)
285
(86)
452
(137)
720
(219)
50
35
(10)
56
(17)
90
(27)
143
(43)
228
(69)
362
(110)
576
(175)