. A complete Parts List is available at www.MillerWelds.com
OM-265 363 Page 19
4-11. Electrical Service Guide
Elec Serv 2011−0
A. Electrical Service Guide For DC 650/800 Digital Models
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.
60 Hz Models (DC 650 Digital) 50 Hz Models (DC 800 Digital)
Input Voltage (V) 230 460 575 380 400 440
Input Amperes (A) At Rated Output 126 63 50.4 77 73 66
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
150 70 60 90 90 80
Normal Operating Fuses 3 200 90 80 125 110 100
Min Input Conductor Size In AWG
4
(mm
2
)
1 (50) 6 (16) 6 (16) 4 (25) 4 (25) 4 (25)
Max Recommended Input Conductor Length In Feet (Meters)
208
(64)
328
(100)
513 (156)
335
(102)
371
(113)
449 (137)
Min Grounding Conductor Size In AWG
4
(mm
2
)
6 (16) 8 (10) 8 (10) 6 (16) 6 (16) 8 (10)
Reference: 2014 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). 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.
B. Electrical Service Guide For DC 1000/1250 Digital Models
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.
60 Hz Models (DC 1000 Digital) 50 Hz Models (DC 1250 Digital)
Input Voltage (V) 230 460 575 380 400 440
Input Amperes (A) At Rated Output 180 90 72 111 105 96
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
225 110 90 125 125 110
Normal Operating Fuses 3 250 125 110 175 150 150
Min Input Conductor Size In AWG
4
(mm
2
)
3/0 (95) 3 (35) 4 (25) 2 (35) 2 (35) 3 (35)
Max Recommended Input Conductor Length In Feet (Meters)
204
(62)
337
(103)
438 (134)
322
(98)
357
(109)
358 (109)
Min Grounding Conductor Size In AWG
4
(mm
2
)
4 (25) 6 (16) 6 (16) 6 (16) 6 (16) 6 (16)
Reference: 2014 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). 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.
To Next Page
