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36
Field wiring
7.7
Wiring Tables and Information
Table 3
Initiating Circuit Wiring
Wire gauge
Maximum wiring run to last device
AWG
Feet
Meters
22
2990
910
20
4760
1450
18
7560
2300
16
12000
3600
14
19000
5800
12
30400
9200
Notes:
For Class A the maximum wiring run to the last device is divided by two.
Maximum loop resistance should not exceed 100 ohms.
Maximum capacitance of 0.5
μ
F total on each initiating circuit.
Table 4
Indicating Circuit Wiring
Total
signal
load in
Amperes
Maximum wiring run to last device
Max. loop
resistance
in ohms
18 AWG
16 AWG
14 AWG
12 AWG
Feet
Meters
Feet
Meters
Feet
Meters
Feet
Meters
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
Notes:
For Class A wiring the resistance in ohms is multiplied by two.
Maximum voltage drop should not exceed 1.8 volts.
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