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OM-222 Page 18
4-13. Electrical Service Guide
60 Hertz Models 300 Amp Model 450 Amp Model 650 Amp Model
Input Voltage 200 230 460 575 200 230 460 575 230 460 575
Input Amperes At Rated Output 70 61 31 25 102 89 45 36 124 62 50
Max Recommended Standard Fuse
Rating In Amperes
1
Time-Delay
2
80 70 35 30 125 110 50 45 150 70 60
Normal Operating 3 110 90 45 35 150 125 70 50 175 90 70
Min Input Conductor Size In AWG
4
6 8 10 12 4 4 8 10 3 8 8
Max Recommended Input Conductor
Length In Feet (Meters)
149
(45)
131
(40)
356
(108)
342
(104)
136
(41)
180
(55)
319
(97)
335
(102)
144
(44)
210
(64)
328
(100)
Min Grounding Conductor Size In
AWG
4
6 8 10 12 6 6 8 10 6 8 8
Reference: 2005 National Electrical Code (NEC)
1 If a circuit breaker is used in place of a fuse, choose a circuit breaker with time-current curves comparable to the recommended fuse.
2 “Time-Delay” fuses are UL class “RK5” .
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and
above).
4 Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table
310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.
50 Hertz Models
300 Amp Model
450 Amp Model 650 Amp Model
Input Voltage 380 400 440 380 400 440 380 400 440
Input Amperes At Rated Output 35 33 31 54 51 47 75 71 65
Max Recommended Standard Fuse Rating In
Amperes
1
Time-Delay
2
40 40 35 60 60 50 90 80 80
Normal Operating 3 60 50 50 80 80 70 125 110 100
Min Input Conductor Size In AWG
4
10 10 10 8 8 8 6 6 6
Max Recommended Input Conductor Length
In Feet (Meters)
243
(74)
269
(82)
326
(99)
218
(66)
241
(73)
292
(89)
219
(67)
242
(74)
293
(89)
Min Grounding Conductor Size In AWG
4
10 10 10 8 8 8 6 6 8
Reference: 2005 National Electrical Code (NEC)
1 If a circuit breaker is used in place of a fuse, choose a circuit breaker with time-current curves comparable to the recommended fuse.
2 “Time-Delay” fuses are UL class “RK5” .
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and
above).
4 Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table
310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.