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150
208 427 600 (2) 350 kcmil * 416 600 (2) 350 kcmil *
240 370 500 (2) 250 kcmil * - - -
380 234 300 350 kcmil 228 300 350 kcmil
400 223 300 350 kcmil 217 300 350 kcmil
415 215 300 350 kcmil 209 300 350 kcmil
480 185 250 250 kcmil - - -
600 148 200 #3/0 AWG - - -
200
380 312 400 (2) #3/0 AWG * 304 400 (2) #3/0 AWG *
400 297 400 (2) #3/0 AWG * 289 400 (2) #3/0 AWG *
415 286 400 (2) #3/0 AWG * 278 350 (2) #2/0 AWG *
480 247 350 (2) #2/0 AWG * - - -
600 197 250 250 kcmil - - -
225
380 352 450 (2) #4/0 AWG * 342 450 (2) #4/0 AWG *
400 334 450 (2) #4/0 AWG * 325 450 (2) #4/0 AWG *
415 322 450 (2) #4/0 AWG * 313 400 (2) #3/0 AWG *
480 278 350 (2) #2/0 AWG * - - -
600 222 300 350 kcmil - - -
300
380 469 600 (2) 350 kcmil * 456 600 (2) 350 kcmil *
400 446 600 (2) 350 kcmil * 433 600 (2) 350 kcmil *
415 430 600 (2) 350 kcmil * 417 600 (2) 350 kcmil *
480 372 500 (2) 250 kcmil * - - -
600 297 400 (2) #3/0 AWG * - - -
* Parallel feeders per NEC 300-20 and 310-4
FLA = Full Load Amps of Power Center
OPD = Overcurrent Protection Device inside FPC
Wire sizes based on NEC 2005, Table 310-16, using 75°C copper conductor
1. Main input power feeder should be a dedicated feeder direct from service entrance or other power source possible
2. Ground conductors recommended to be insulated conductors run with power conductors for increased system performance. Ground
conductor minimum size per NEC Table 250-66. Input power feeder conduit may be used as the safety ground conductor. When conduit
is used, adequate electrical continuity must be maintained at conduit connections to enclosures and throughout conduit run.
3. Input feeder wire size listed in this table is the minimum feeder size recommended. Larger wire size may be required because of voltage
drop or supply overcurrent protection device.
4. For transformerless units with 3-phase 4W + G input feeder larger wire size may be required because of excessive neutral current (see
NEC Table 310-15 note 4: For best performance, the unit should be located as close to load as practical.
Table 5 Main input circuit breaker interrupting rating
Standard interrupting rating*
208V 480V 380-415V 600V
65 kA 35 kA 35 kA 18 kA
* Refer to unit specification sheet for units equipped
with non-standard main input breakers.
Table 4 Suggested minimum input wire size data (continued)
kVA
Input
Voltage
Units with Transformers Transformerless Units
Input
FLA
Input
OPD
Suggested Feeder
Wire Size (AWG)
Full Load
Amps
MIB Trip
Amps
Suggested Feeder
Wire Size (AWG)