Electrical Service Guide - Miller Electric Spectrum 1251 Owner's Manual

4-7. Electrical Service Guide

Y CAUTION:
INCORRECT INPUT POWER can damage this welding power source. This welding power
source requires a CONTINUOUS supply of 50 or 60 Hz (+10%) power at +10% of 575V or −10% of 208V
input voltage. Phase to ground voltage shall not exceed +10% of rated input voltage. Do not use a gener-
ator with automatic idle device (that idles engine when no load is sensed) to supply input power to this
plasma power source.
Input Voltage
Input Amperes At Rated Output
Max Recommended Standard Fuse Rating In Amperes
Min Input Conductor Size In AWG
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG
Reference: 2005 National Electrical Code (NEC) (including article 630)
1 Consult factory for circuit breaker applications.
2 "Time-Delay" fuses are UL class "RK5" .
3 "Normal Operating" (general purpose - no intentional delay) fuses are UL class "K5" (up to and including 60 amp), and UL class "H" ( 65 amp 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.
Input Voltage
Input Amperes At Rated Output
Max Recommended Standard Fuse Rating In Amperes
Min Input Conductor Size In AWG
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG
Reference: 2005 National Electrical Code (NEC) (including article 630)
1 Consult factory for circuit breaker applications.
2 "Time-Delay" fuses are UL class "RK5" .
3 "Normal Operating" (general purpose - no intentional delay) fuses are UL class "K5" (up to and including 60 amp), and UL class "H" ( 65 amp 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.
OM-201 872 Page 14
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A complete Parts List is available at www.MillerWelds.com
1
2
Time-Delay
3
Normal Operating
4
4
1
2
Time-Delay
3
Normal Operating
4
4
60 Hz Three Phase
208 230 460
55 49 24
60 60 30
80 70 35
8 8 10
89 108 284
(27) (33) (87)
8 8 10
50 Hz Three Phase
400
28
25
35
12
155
(47)
12
575
19
20
30
12
268
(82)
12