Miller DYNASTY 350, Owner'S Manual

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OM-216 869 Page 25
4-9. Electrical Service Guide
A. Dynasty 350 Models
Actual input voltage should not be 10% less than minimum (5% for 380 volt CE models) and/or 10% more than maximum input voltages listed
in table. If actual input voltage is outside this range, output may not be be available.
NOTICE − INCORRECT INPUT POWER can damage this welding power source. Phase to ground voltage shall not 10% of rated input volt-
age.
Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda-
tions are for a dedicated branch circuit sized for the rated output and duty cycle of the welding power source.
Three-Phase
Input Voltage (V) 208 230 380 400 460 575
Input Amperes (A) At Rated Output - 300 amps @ 32 volts 36 32 19 18 16 13
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
40 35 20 20 20 15
Normal Operating Fuses
3
50 45 30 25 25 20
Min Input Conductor Size In AWG
4
10 10 12 14 14 14
Max Recommended Input Conductor Length In Feet (Meters)
88
(27)
107
(33)
177
(54)
127
(39)
168
(51)
262
(80)
Min Grounding Conductor Size In AWG
4
10 10 12 14 14 14
Reference: 2008 National Electrical Code (NEC) (including article 630)
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” . See UL 248.
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amps), and UL class “H” ( 65 amps 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.
Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda-
tions are for a dedicated branch circuit sized for the rated output and duty cycle of the welding power source.
Single-Phase
Input Voltage (V) 208 230 460 575
Input Amperes (A) At Rated Output - 225 amps @ 29 volts 47 43 21 16
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
50 50 25 20
Normal Operating Fuses
3
70 60 30 25
Min Input Conductor Size In AWG
4
8 8 12 14
Max Recommended Input Conductor Length In Feet (Meters)
88
(27)
108
(33)
172
(52)
174
(53)
Min Grounding Conductor Size In AWG
4
8 10 12 14
Reference: 2008 National Electrical Code (NEC) (including article 630)
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” . See UL 248.
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amps), and UL class “H” ( 65 amps 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.