Miller Subarc AC/DC 1000, Owner'S Manual

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OM-246 011 Page 23
4-13. Electrical Service Guide
A. 1000 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.
Three-Phase, 60 Hz
Input Voltage (V) 460
Input Amperes (A) At Rated Output 158
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
175
Normal Operating Fuses 3 225
Min Input Conductor Size In AWG 4 1
Max Recommended Input Conductor Length In Feet (Meters) 379 (115)
Min Grounding Conductor Size In AWG 4 4
Reference: 2011 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. 1250 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.
Three-Phase, 50 Hz
Input Voltage (V) 380 400
Input Amperes (A) At Rated Output 179 176
Max Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
200 200
Normal Operating Fuses 3 250 250
Min Input Conductor Size In AWG 4 1/0 1/0
Max Recommended Input Conductor Length In Feet (Meters) 323 (98) 352 (107)
Min Grounding Conductor Size In AWG 4 4 4
Reference: 2011 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.