Pelco C655M-A manual Input Total VA Wire Gauge Voltage Consumed, 10VA

Table C. Recommended Wiring Distances

The following are the recommended maximum distances (transformer to load) and are calculated with a 10-percent voltage drop. (Ten percent is generally the maximum allowable voltage drop for AC-powered devices.) Distances are calculated in feet; values in parentheses are meters.

Input	Total VA		Wire Gauge
Voltage	Consumed	20	18		16
	10	283 (86)	451	(137)	716 (218)
24 VAC	20	141 (42)	225 (68)		358 (109)
	30	94 (28)	150 (45)		238 (72)
	50	56 (17)	90	(27)	143 (43)

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 2-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 volts. Therefore, the 24-volt output has an acceptable range from 24 volts down to 21.6 volts.

Table D. Required Wire Gauge

	CCD Camera	PT480 Pan/Tilt	Indoor Spectra	Require Wire Gauge Table (AWG)				Outdoor Spectra
WIRE				PT570 Pan/Tilt	Esprit Pan/Tilt	inch-14 Intercept	CX9000 Receivers		!Equipment Loads
DIST
(feet)
	10VA	20VA	30VA	40VA	50VA	60VA	70VA	80VA	90VA	100VA	200VA
1000	12-14	12	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
900	12-14	12	12	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
800	12-14	12	12	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
700	12-16	12	12	12	N/A	N/A	N/A	N/A	N/A	N/A	N/A
600	12-16	12	12	12	N/A	N/A	N/A	N/A	N/A	N/A	N/A
500	12-16	12-14	12	12	12	N/A	N/A	N/A	N/A	N/A	N/A
400	12-18	12-14	12	12	12	12	12	N/A	N/A	N/A	N/A
300	12-18	12-16	12-14	12	12	12	12	12	12	N/A	N/A
200	12-20	12-18	12-16	12-14	12-14	12	12	12	12	12	N/A
100	12-22	12-20	12-18	12-18	12-16	12-16	12-16	12-14	12-14	12-14	12
	XX-XX
	!

Recommended Wire Gauge (AWG) using 24 VAC

N/A – Distance and load not recommended for any wire size between 12-22 (AWG)

C655M-A (1/07) 5