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OM-277 Page 18
3-11. Electrical Service Guide
60 Hertz Models 300 Amp Model 450 Amp Model
Input Voltage 200 230 460 575 200 230 460 575
Input Amperes At Rated Output 69 60 30 24 104 90 45 36
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay
2
80 70 35 30 125 110 50 45
Normal Operating 3 100 90 45 35 150 125 70 50
Min Input Conductor Size In AWG/Kcmil 4 6 10 10 2 3 8 8
Max Recommended Input Conductor Length In Feet (Me-
ters)
225
(69)
203
(62)
367
(112)
573
(175)
173
(53)
191
(58)
287
(87)
448
(137)
Min Grounding Conductor Size In AWG/Kcmil 8 8 10 10 6 6 8 10
Reference: 1999 National Electrical Code (NEC)
1 Consult factory for circuit breaker applications.
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).
50 Hertz Models 300 Amp Model 450 Amp Model
Input Voltage 380 400 440 380 400 440 520
Input Amperes At Rated Output 36 34 31 52.5 51 46 38
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay
2
45 40 35 60 60 50 45
Normal Operating 3 50 50 45 80 80 70 60
Min Input Conductor Size In AWG/Kcmil 8 8 8 6 6 8 8
Max Recommended Input Conductor Length In Feet (Me-
ters)
370
(113)
409
(125)
495
(151)
342
(104)
379
(115)
303
(92)
423
(129)
Min Grounding Conductor Size In AWG/Kcmil 10 10 10 8 8 8 10
Reference: 1999 National Electrical Code (NEC)
1 Consult factory for circuit breaker applications.
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).