6C417M-L (7/03)
13. If required, attach a ground wire to the terminal lug on the rear plate.
IMPORTANT NOTE: The internal grounding terminal must be used for the equipment grounding connection and the external
terminal is for a supplementary bonding connection where local codes or authorities permit or require such connection.
14. Connect the video and power wiring from the sealing fittings to their sources through fittings and conduit suitable for
hazardous locations.
15. For U.S. and Canada Only – Seal the fittings as specified by the manufacturer’s installation instructions in manual
C903M-A. Sealant is not supplied or available from Pelco.
Wire Gauge
Maximum distance from transformer to load
Table A. 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.)
EXAMPLE: An enclosure that requires 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.
20 AWG 18 AWG 16 AWG 14 AWG 12 AWG 10 AWG
(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)
110 25 41 65 103 164 261
(7) (12) (19) (31) (49) (79)
120 23 37 59 95 150 240
(7) (11) (17) (28) (45) (73)
130 21 34 55 87 139 221
(6) (10) (16) (26) (42) (67)
140 20 32 51 81 129 205
(6) (9) (15) (24) (39) (62)
Total VA consumed