What fuse size is recommended for the PipeWorx 400 when running on 460-volt, three-phase input power?
For 460-volt, three-phase input power, the maximum recommended time-delay fuse rating is 40 amperes, and the maximum recommended normal operating fuse rating is 50 amperes. The minimum input conductor size recommended is 8 AWG. The input amperage at rated output for 460V is 34 amperes. (Page 22)
From the official Miller PipeWorx 400 Welding Machine manual, page 22
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