Andover Controls SCX 920 - Page 16

Hardware Installation
8 SCX 920 Installation Guide
Table 1 shows the maximum runs for wires of various gauges to keep
errors within .5°F, .25°F, and .10°F when sensing temperatures up to
70°F.
Table 2 shows the maximum runs for wires of various gauges to keep
errors minimal when sensing temperatures up to 100°F.
Table 1. Wire Gauges and Corresponding Maximum Runs
for Sensing Temperatures Up to 70
°
F
Gauge
1
/
2
°
F Error
1
/
4
°
F Error
1
/
10
°
F Error
#14 26,700 ft 13,300 ft 5300 ft
#16 16,800 ft 8400 ft 3300 ft
#18 10,500 ft 5200 ft 2100 ft
#20 6600 ft 3300 ft 1300 ft
#22 4100 ft 2000 ft 800 ft
Table 2. Wire Gauges and Corresponding Maximum Runs
for Sensing Temperatures Up to 100
°
F
Gauge
1
/
2
°
F Error
1
/
4
°
F Error
1
/
10
°
F Error
#14 12,700 ft 6300 ft 2500 ft
#16 7900 ft 3900 ft 1500 ft
#18 5000 ft 2500 ft 1000 ft
#20 3100 ft 1500 ft 600 ft
#22 1900 ft 900 ft 300 ft
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