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C3468M (4/10) 17
Refer to Table B for the recommended maximum distances for 24 VAC and 24 VDC applications, which are
calculated with a 10 percent voltage drop. (Ten percent is generally the maximum allowable voltage drop
for AC- or DC-powered devices.)
Table A. Video Coaxial Cable Requirements
Cable Type* Maximum Distance
RG59/U 750 ft (229 m)
RG6/U 1,000 ft (305 m)
RG11/U 1,500 ft (457 m)
*Cable requirements:
• 75-ohm impedance
• All-copper center conductor
• All-copper braided shield with
95 percent braid coverage
Table B. 24 VAC/24 VDC Wiring Distances
AC/DC
Total VA/
Total Watts
Wire Gauge
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
23 VA/
15 W
123 ft
(38 m)
196 ft
(60 m)
311 ft
(95 m)
495 ft
(151 m)
73 VA/
65 W
39 ft
(12 m)
62 ft
(19 m)
98 ft
(30 m)
156 ft
(48 m)
NOTE: Input power for the dome is 24 VAC or 24 VDC. Using 24 VAC input power,
power consumption is 23 VA per dome for indoor models and 73 VA for outdoor models.
Using 24 VDC input power, power consumption is 0.7 A (15 W) for indoor models and
3 A (65 W) for outdoor models.
Use a 24 VAC transformer with the following minimum VA:
• 40 VA per dome: For indoor models (without heater)
• 100 VA per dome: For outdoor models (with heater)