ProSYS Installation and Programming Manual 7
AWG
Gauge
Size
Wire Diameter Resistance: Feet Resistance: Meters
Inches Millimeters Ω Per Foot Ω Per 1000
Feet
Ω Per Meter Ω Per 100
Meters
24 0.020 0.50 0.026 26.0 0.085 8.5
22 0.025 0.64 0.016 16.0 0.052 5.2
20 0.031 0.80 0.010 10.0 0.032 3.2
19 0.035 0.90 0.008 8.0 0.026 2.6
18 0.040 1.00 0.006 6.0 0.020 2.0
16 0.050 1.27 0.004 4.0 0.013 1.3
14 0.064 1.63 0.0025 2.5 0.008 0.82
Table A-1: Wire Facts
One-Way Wire Distance Between
ProSYS and Plug-In Transformer
AWG (American Wire Gauge)
For best results use the indicated wire size
or larger (numerically lower) size
In Feet In Meters 22 20 18 16 14
Up to 15 feet Up to 5 meters

15 - 25 feet 5 - 8 meters

25 - 40 feet 8 - 12 meters

40 - 60 feet 12 - 20 meters

60 - 100 feet 20 - 30 meters

Table A-2: Wiring Between the ProSYS Main Panel and the 16.5 VAC/40VA Plug-In Transformer
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’s customer support service for detailed
information.
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