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. A complete Parts List is available at www.MillerWelds.com
OM-201 872 Page 14
4-7. Electrical Service Guide
Y CAUTION: INCORRECT INPUT POWER can damage this welding power source. This welding power
source requires a CONTINUOUS supply of 50 or 60 Hz (+10%) power at +10% of 575V or −10% of 208V
input voltage. Phase to ground voltage shall not exceed +10% of rated input voltage. Do not use a gener-
ator with automatic idle device (that idles engine when no load is sensed) to supply input power to this
plasma power source.
60 Hz Three Phase
Input Voltage 208 230 460 575
Input Amperes At Rated Output 55 49 24 19
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay
2
60 60 30 20
Normal Operating
3
80 70 35 30
Min Input Conductor Size In AWG
4
8 8 10 12
Max Recommended Input Conductor Length In Feet (Meters)
89
(27)
108
(33)
284
(87)
268
(82)
Min Grounding Conductor Size In AWG
4
8 8 10 12
Reference: 2005 National Electrical Code (NEC) (including article 630)
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).
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 Hz Three Phase
Input Voltage 400
Input Amperes At Rated Output 28
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay
2
25
Normal Operating
3
35
Min Input Conductor Size In AWG
4
12
Max Recommended Input Conductor Length In Feet (Meters)
155
(47)
Min Grounding Conductor Size In AWG
4
12
Reference: 2005 National Electrical Code (NEC) (including article 630)
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).
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.