Welder Electrical Service Guide – Fuse Ratings, Wire Sizes, 200-575V 1/3-Phase

This document is Section 3-13, "Electrical Service Guide," from a welding power source manual (likely a Miller welder such as a Syncrowave/similar unit, given the filename 350P). It provides electrical branch circuit sizing recommendations for connecting the welding power source to 60 Hz single-phase and three-phase supplies at input voltages of 200, 230, 460, and 575 volts. For each voltage and phase configuration, the table lists: input amperes at rated output (ranging from 69 A at 200 V single phase down to 12 A at 575 V three phase), maximum recommended standard fuse ratings for both time-delay fuses (10–80 A) and normal operating fuses (15–100 A), minimum input conductor size in AWG (6–14 AWG), maximum recommended input conductor length in feet and meters (86–229 ft / 26–85 m), and minimum grounding conductor size in AWG (8–14 AWG). A safety warning states that failure to follow the recommendations could create an electric shock or fire hazard, and that the values are for a dedicated branch circuit sized for the rated output and duty cycle of the welding power source. Footnote markers 1–4 are present, but the footnote text itself is not visible on this page.