Owner`s manual
. A complete Parts List is available at www.MillerWelds.com
OM-242 880 Page 17
4-11. Electrical Service Guide
NOTICE − INCORRECT INPUT POWER can damage this welding power source. Phase to ground voltage shall not exceed +10% of rated input
voltage.
. 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 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 branch circuit sized for the rated output and duty cycle of the welding power source.
Single-Phase
Input Voltage (V) 208 230
Input Amperes (A) At Rated Output 48 42
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
50 50
Normal Operating Fuses
3
70 60
Min Input Conductor Size In AWG/Kcmil
4
10 10
Max Recommended Input Conductor Length In Feet (Meters)
55
(17)
68
(21)
Min Grounding Conductor Size In AWG/Kcmil
4
10 10
Three-Phase
Input Voltage (V) 208 230 380 460 575
Input Amperes (A) At Rated Output 27 25 15 12 10
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
30 30 15 15 10
Normal Operating Fuses
3
40 35 20 20 15
Min Input Conductor Size In AWG/Kcmil
4
12 12 14 14 14
Max Recommended Input Conductor Length In Feet (Meters)
68
(21)
83
(25)
148
(45)
216
(66)
341
(104)
Min Grounding Conductor Size In AWG/Kcmil
4
12 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.