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5-6. Electrical Service Guide
NOTICE − INCORRECT INPUT POWER can damage this welding power source. This welding power source requires a CONTINUOUS supply of
input power at rated frequency(+10%) and voltage (+10%). Phase to ground voltage shall not exceed +10% of rated input voltage. Do not use a genera-
tor with automatic idle device (that idles engine when no load is sensed) to supply input power to this welding power source.
NOTICE − Actual input voltage should not be 10% less than minimum and/or 10% more than maximum input voltages listed in table. If actual input
voltage is outside this range, output may not be available.
Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda-
tions are for a dedicated circuit sized for the rated output and duty cycle of the welding power source.
In dedicated circuit installations, the National Electrical Code (NEC) allows the receptacle or conductor rating to be less than the rating
of the circuit protection device. All components of the circuit must be physically compatible. See NEC articles 210.21, 630.11, and
630.12.
Input Voltage (V)
Rated Maximum Supply Current I
Maximum Effective Supply Current I
Max Recommended Standard Fuse Rating In Amperes
Normal Operating Fuses
Min Input Conductor Size In AWG (mm
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG (mm
Reference: 2017 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
310.15(B)(16) and is based on allowable ampacities of insulated copper conductors having a temperature rating of 167°F (75°C) with not more than
three single current−carrying conductors in a raceway. 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.
Notes
.
A complete Parts List is available at www.MillerWelds.com
(A)
1max
(A)
1eff
1
2
Time-Delay Fuses
3
4
2
)
2) 4
50/60 Hz Three Phase
230
380
46.5
27.6
26.3
15.8
50
30
70
40
10 (6)
12 (4)
73 (22)
123 (38)
10 (6)
12 (4)
Elec Serv 2017-01
400
460
26.3
22.6
14.9
13.0
30
25
40
35
14 (2.5)
14 (2.5)
88 (27)
118 (36)
14 (2.5)
14 (2.5)
OM-245171 Page 19