10 gauge is good for up to 30 amps input. I suggest a minimum of 8 gauge thhn.
Dan
__________________
Units owned
Longevity WeldPro LS200PI (IGBT) welder and Force Cut LP80 plasma cutter, Longevity auto dark welding helmet
Atlas 10x36" lathe
Craftsman 5HP 30 Gal compressor
Home made CNC router/plasma cutting table
Home built aluminum foundry, HF 4x6 bandsaw, O/A torch