Wiring Tables And Information; Table 3 Initiating Device Circuit Wiring Distances; Table 4 Notification Appliance Circuit Wiring Distances - Mircom FR-320 Series Installation And Operation Manual

6.9

Wiring Tables and Information

The numbers in these tables represent the entire loop length.

Table 3 Initiating Device Circuit Wiring Distances

WIRE GAUGE
AWG
22
20
18
16
14
12
i
Notes: For class A the maximum wiring run to the last device is divided by two.

Table 4 Notification Appliance Circuit Wiring Distances

TOTAL MAXIMUM WIRING RUN TO LAST DEVICE (ELR)
SIGNAL
18AWG
LOAD
Amperes ft
0.06 2350
0.12 1180
0.30 470
0.60 235
0.90 156
1.20 118
1.50 94
1.70 78
i
Notes: For class A wiring the resistance in ohms is multiplied by two.
30
MAXIMUM WIRING RUN TO LAST DEVICE
FEET
2990
4760
7560
12000
19000
30400
Maximum loop resistance should not exceed 100 Ω.
Maximum capacitance of 0.5 μF total on each Initiating Device Circuit.
16AWG 14AWG
m ft m ft
716 3750 1143 6000
360 1850 567 3000
143 750 229 1200
71 375 114 600
47 250 76 400
36 185 56 300
29 150 46 240
24 125 38 200
Maximum voltage drop should not exceed 1.8 volts.
METERS
910
1450
2300
3600
5800
9200
MAX. LOOP
RESISTANCE
12AWG
m ft m Ohms
1829 9500 2895 30
915 4720 1438 15
366 1900 579 6
183 950 289 3
122 630 192 2
91 470 143 1.5
73 380 115 1.2
61 315 96 1.0