Welding generators typically range in amperage output from around 20 amps for smaller, lighter-duty welders to 250 amps or more for larger, industrial-grade machines. The specific amperage needed depends on the type of welding being done and the thickness of the materials being joined.
Here's a more detailed breakdown:
Small, Home/DIY welders: May use 20-130 amps, often compatible with standard 13 amp, 3-pin plugs.
Medium-duty welders: Can range from 130-250 amps, requiring higher voltage (230V) or even 3-phase power for the larger machines