Trilogy INFINITY Series - Page 7

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To minimize disturbances caused by other loads in the building, the 3-phase or single-phase
power input to the unit should be supplied directly from the service entrance or other power
source (a dedicated power feeder).
The input feeder circuit should be sized in accordance with the NEC and any local building
codes to assure the feeder’s ability to safely carry the system’s full load current, including
losses.
Input feeder conductors should be sized for no more than 2% voltage drop. If operation at
under-voltage conditions for extended periods of time is desired, the input feeders must be
oversized.
Typical conductor size data is shown in Table 2 all connections must comply with the NEC
and all other applicable codes.
Table 2: Typical conductor size
Input Voltage
KVA (80%)
Max Input
Feeder
Suggested feeder
wire size (AWG)
Max at 80%
Output Amps
208V
16
28
36
43
100
100
125
150
AWG # 3
80
80
100
120
240V
18
33
100
100
AWG # 3
80
80
Table 3: Main Feeder Input Circuit Breaker Interrupting Rating
Input OPD
Standard Interrupting Rating *
208V
Up to 110 A
10 - 22kA
Depending on the building circuit breaker coordination
125 to 250 A