Wiring
Page 196
Wire Gauge
Max Combined Length of ALL Expansion
Bus Wiring
24 AWG
7/02mm
150 meters
492 feet
22 AWG
16/02mm
200 meters
656 feet
20 AWG
24/02mm
333 meters
1092 feet
19 AWG
28/02mm
400 meters
1312 feet
Table A-3: Wire Gauge
Notes:
For maximum system stability, it is best NOT to exceed a total of 300 meters (1000
feet) of wire when wiring the Expansion bus.
For a distance of more than 300 meters, refer to RISCO Group technical support
service for detailed information.
Total
Auxiliar
y Power
(Max
Current
Draw
per
Branch)
Desired Wire Gauge in Particular Branch
32/02
mm
18 AWG
28/02
mm
19 AWG
24/02 mm
20 AWG
16/02
mm
22 AWG
7/02 mm
24 AWG
Max
Run
Max Run
Max Run
Max Run
Max Run
Meters
Feet
Meters
Feet
Meters
Feet
Meters
Feet
Meters
Feet
20mA
1195
3920
945
3100
750
2460
472
1550
296
970
30mA
793
2600
628
2060
500
1640
314
1030
197
646
40mA
597
1960
472
1550
375
1230
236
775
148
485
50mA
478
1568
378
1240
300
984
189
620
118
388
60mA
296
1300
314
1030
250
820
157
515
98
323
70mA
341
1120
270
886
214
703
135
443
84
277
80mA
299
980
237
775
187
615
118
388
74
243
90mA
264
867
209
687
166
547
105
343
66
215
100mA
239
784
189
620
123
492
94
310
59
194
Table A-4: Total Auxiliary Power
Note:
The wire lengths indicated represent the one-way distance between the source
of power and the last detector in the branch.
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