63
Field Wiring
8.8 Wiring Tables and Information
Main board NAC circuits are rated for 1.7 amps each. The SGM-1004A NAC circuits are rated
for 1.7 amps each.
Table 14 Wiring Table for Initiating Circuits
Wire Gauge Maximum Wiring Run to Last Device (ELR)
(AWG) ft. m
22 2990 910
20 4760 1450
18 7560 2300
16 12000 3600
14 19000 5800
12 30400 9200
Note: Maximum loop resistance should not exceed 100 Ohms.
Table 15 NAC Circuit Wiring Table
TOTAL
SIGNAL
LOAD
MAXIMUM WIRING RUN TO LAST DEVICE (ELR) MAX. LOOP
RESISTANCE
18AWG 16AWG 14AWG 12AWG
Amperes ft m ft m ft m ft m Ohms
0.06 2350 716 3750 1143 6000 1829 8500 2591 30
0.12 1180 360 1850 567 3000 915 4250 1296 15
0.30 470 143 750 229 1200 366 1900 579 6
0.60 235 71 375 114 600 183 850 259 3
0.90 156 47 250 76 400 122 570 174 2
1.20 118 36 185 56 300 91 425 129 1.5
1.50 94 29 150 46 240 73 343 105 1.2
1.70 78 24 125 38 200 61 285 87 1.0
Note: Maximum voltage drop should not exceed 1.8 volts.
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