Elgar SmartWave SW1750A, Operation Manual

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Installation SW 5250A•SW 3500A•SW 1750A
2-16 Operation Manual
Such a loss directly detracts from the quality performance specifications of this Elgar
instrument. Frequently, these codes do not consider bundles of wire within a cable
arrangement.
In high performance applications, as in motor start-up and associated inrush/ transient
currents, additional consideration is required. The cable wire gauge must consider peak
voltages and currents, which may be up to ten times the average values. An underrated
wire gauge adds losses, which alter the inrush characteristics of the application and
thus the expected performance.
Table 2–9 identifies popular ratings for DC and AC power source cable wire gauges.
C
OLUMN
1:
SIZE
(AWG)
C
OLUMN
2:
AMPERES
(MAXIMUM)
C
OLUMN
3:
OHMS/100 FEET
(ONE WAY)
C
OLUMN
4:
IR DROP/100 FEET
(COL. 2 X COL. 3)
14 15 0.257 3.85
12 20 0.162 3.24
10 30 0.102 3.06
8 40 0.064 2.56
6 55 0.043 2.36
4 70 0.025 1.75
2 95 0.015 1.42
1/0 125 0.010 1.25
3/0 165 0.006 1.04
Table 2–9 Recommended Wire Gauge Selection Guide