Reference

Worked MIG amp sizing examples

1/8 in, 3/16 in, 1/4 in, thick plate, and over-range cases with expected classes.

Thickness 0.125 → 130 A class (lnk_class_130).

Details

Starting amps ≈ 125 A. Typical auto body sheet.

Tools

Thickness 0.1875 → 200 A class (lnk_class_200).

Details

Starting amps ≈ 188 A. Light structural plate.

Tools

Thickness 0.25 → 250 A class (lnk_class_250).

Details

Starting amps ≈ 250 A. Top of consumer ladder.

Reference

Thickness 0.3125 → NO_MATCH (no CTA).

Details

Starting amps ≈ 313 A exceeds 250 A ceiling on this site.

Guides

Miller starting rule and class ladder explained.