What auxiliary power receptacles are included on the Big Blue 400 Pro?
The auxiliary power panel includes a 50A 125/250V flush-mount receptacle (part number 182954, NEMA 14-50) and two GFCI 15/20A receptacles (part number 280236). The panel also includes a 2-pole 50A 240VAC supplementary protector (CB5) and two 20A supplementary protectors (CB4, CB6) to protect the circuits.
From the official Miller Big Blue 400 Pro Welding Machine manual, page 10
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