GE Security Legend IP, Installation Manual

Page: 19 / 82

Chapter 1
Introduction
11
Power requirements
All Legend IP domes require a 24 VAC power supply to operate the domes’ PTZ, camera, and heater/blower,
if present. The startup and running power requirements vary depending on the model (
Table 3 ).
Be aware that Legend IP domes have greater power requirements than do CyberDome or analog Legend
domes, which may require upgrading the power cabling for Legend IP domes.
Power cable size and length requirements
Using the proper gauge of power cable will ensure proper operation and avoid voltage drops. See Table 4 for the
recommended cable gauge for varying maximum cable lengths for the different models of domes.
CAUTION: Use only a Class 2 power supply of the required output rating as listed on individual units and specified.
Table 3. Power requirements at 24 VAC (±4 VAC) operating voltage
Model Start-up power Running power
Dome without heater/blower 30 W 24 W
Dome with heater/blower 60 W 44 W
Rugged and HD dome with 25 W heater/blower 100 W 74 W
Table 4. Recommended power cable gauges based on maximum lengths for an operating voltage of 24 VAC (±4 VAC)
Wire gauge
Domes without
heater/blower
(30 W)
Domes with
heater/blower
(60 W)
HD domes with
heater/blower
(100 W)
AWG mm
2
feet meters feet meters feet meters
10 2.60 1565 477 780 238 470 143
12 2.05 985 300 490 149 295 90
14 1.62 620 189 310 94 185 56
16 1.29 390 119 195 59 115 35
18 1.02 245 75 120 37 70 21
20 0.81 150 46 75 23 45 14
22 0.64 95 29 45 14 25 8