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Pelco Manual C454M-C (1/98) 13
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)
* Minimum cable requirements:
75 ohms
All-copper center conductor
All-copper braided shield with 95% braid coverage
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. (10-percent is generally the
maximum allowable voltage drop for AC-powered devices.)
20 18 16 14 12 10
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)
110 25 41 65 103 164 261
(7) (12) (19) (31) (49) (79)
12023 3759 95150240
(7) (11) (17) (28) (45) (73)
13021 3455 87139221
(6) (10) (16) (26) (42) (67)
14020 3251 81129205
(6) (9) (15) (24) (39) (62)
15018 3047 76120192
(5) (9) (14) (23) (36) (58)
16017 2844 71113180
(5) (8) (13) (21) (34) (54)
17016 2642 67106169
(4) (7) (12) (20) (32) (51)
18015 2539 63100160
(4) (7) (11) (19) (30) (48)
19014 2337 60 95151
(4) (7) (11) (18) (28) (46)
20014 2235 57 90144
(4) (6) (10) (17) (27) (43)
Total vA consumed
EXAMPLE:
An enclosure that re-
quires 80 vA and is installed 35 feet
(10 m) from the transformer would
require a minimum wire gauge of 20
Awg.
NOTE:
Distances are calculated in
feet; values in parentheses are
meters.