Pelco C654M-E (12/08) 3 Power Supply User Manual


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8 C654M-E (12/08)
You can use Table D as a guide to determine the necessary wire gauge (AWG) for various cable distances that provide 24 VAC power. Or use it in
a reverse fashion to determine the maximum allowable cable distance for a particular wire gauge. Table D applies when using two-conductor
copper wire with characteristics similar to West Penn 221-227 unshielded cable. Calculations are based on a 10-percent voltage drop (generally
the maximum allowable drop for AC-powered devices).
The minimum acceptable voltage is calculated as follows:
24.0 VAC
–02.4 (10%)
21.6 (Minimum Acceptable Voltage)
The minimum acceptable voltage used to create Table D was 21.6 V. Therefore, the 24-V output has an acceptable range from 24 V down to
21.6 V; the 28-V output’s acceptable range is from 28 V down to 21.6 V.
Table D. Required Wire Gauge
Required Wire Gauge Table (AWG)
Equipment Loads (VA)
WIRE
DIST
(feet)
CCD
Camera
P/T480
Pan/Tilt
Indoor
Spectra
PT570
Pan/Tilt
Esprit
Pan/Tilt
Indoor
XLS
CX9000
Rxr’s
Outdoor
Spectra
10 VA 20 VA 30 VA 40 VA 50 VA 60 VA 70 VA 80 VA 90 VA 100 VA 200 VA
1000 12-1412*********
16-18 12-14 12-14 12 * * * * * * *
900 12-141212********
16-18 14-16 12-14 12 12 * * * * * *
800 12-141212********
16-18 14-16 12-14 12 12 12 * * * * *
700 12-16121212*******
18-20 14-16 12-14 12-14 12 12 * * * * *
600 12-16121212*******
18-20 14-18 14-16 12-14 12-14 12 12 12 * * *
500 12-16 12-14 12 12 12 * * * * * *
18-20 16-18 14-16 12-14 12-14 12-14 12 12 12 * *
400 12-18 12-14 12 12 12 12 12 * * * *
20-22 16-18 14-18 14-16 12-14 12-14 12-14 12 12 12 *
300 12-1812-1612-14121212121212 * *
20-22 18-20 16-18 14-18 14-16 14-16 12-14 12-14 12-14 12-14 *
200 12-20 12-18 12-16 12-14 12-14 12 12 12 12 12 *
22 20-22 18-20 16-18 16-18 14-16 14-16 14-16 14-16 12-14 12-14
100 12-22 12-20 12-18 12-18 12-16 12-16 12-16 12-14 12-14 12-14 12
* 22 20-22 20-22 18-20 18-20 18-20 16-18 16-18 12-14 12-14
XX-XX Allowable Wire Gauge (AWG) Using 24-V Tap
XX-XX Allowable Wire Gauge (AWG) Using 28-V Tap
*Distance and Load not recommended for any wire size from 12 to 22 (AWG)
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