Miller Electric Auto-Axcess 450 manual Electrical Service Guide, Hz Three Phase Input Voltage

3-12. Electrical Service Guide

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.

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.

.Actual input voltage should not exceed ± 10% of indicated required input voltage. If actual input voltage is outside of this range, output may not be available.

		60 Hz Three Phase
Input Voltage	208	230	400	460	575
Input Amperes At Rated Output	67	59	34	29	23
Max Recommended Standard Fuse Rating In Amperes
Circuit Breaker 1, Time-Delay 2	80	70	40	35	25
Normal Operating 3	100	90	50	45	35
Min Input Conductor Size In AWG 4	4	6	8	10	10
Max Recommended Input Conductor Length In Feet (Meters)	173	136	263	228	356
	(53)	(42)	(80)	(69)	(108)
Min Grounding Conductor Size In AWG 4	8	8	8	10	10

Reference: 2005 National Electrical Code (NEC) (including article 630)

1Choose a circuit breaker with time-current curves comparable to a Time Delay Fuse.

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).

4Conductor 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.

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