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6 Pelco Manual C2428M-A (2/01)
Wire Gauge
Maximum distance from transformer to load
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.)
20 18 16 14 12 10
(0.5 mm
2
) (1.0 mm
2
)(1.5 mm
2
) (2.5 mm
2
)(4.0 mm
2
) (6.0 mm
2
)
10 283 451 716 1142 1811 2880
(86) (137) (218) (348) (551) (877)
20 141 225 358 571 905 1440
(42) (68) (109) (174) (275) (438)
30 94 150 238 380 603 960
(28) (45) (72) (115) (183) (292)
40 70 112 179 285 452 720
(21) (34) (54) (86) (137) (219)
50 56 90 143 228 362 576
(17) (27) (43) (69) (110) (175)
60 47 75 119 190 301 480
(14) (22) (36) (57) (91) (146)
70 40 64 102 163 258 411
(12) (19) (31) (49) (78) (125)
80 35 56 89 142 226 360
(10) (17) (27) (43) (68) (109)
90 31 50 79 126 201 320
(9) (15) (24) (38) (61) (97)
100 28 45 71 114 181 288
(8) (13) (21) (34) (55) (87)
Total vA consumed
EXAMPLE:
An enclosure
that requires 80 vA and is
installed 35 feet (10 m) from
the transformer would re-
quire a minimum wire gauge
of 20 Awg.
NOTE:
Distances are cal-
culated in feet; values in pa-
rentheses are meters.
Table C. 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)
* Minimum cable requirements:
75 ohms impedance
All-copper center conductor
All-copper braided shield with 95% braid coverage
OPERATION
The enclosure has a thermostatically controlled heater, that is set to turn on at 50°F (10°C)
and turn off at 80°F (27°C). The defroster operates continuously.
MAINTENANCE
Regularly scheduled maintenance prolongs the operational life and appearance of the
equipment. Clean the window regularly with a soft cloth using a mild, nonabrasive detergent
and water to maintain picture clarity.