What size breaker do I need for a 220v MIG welder?

# Breaker Size for a 220V MIG Welder

Most home/hobby MIG welders running on 220V need a 30-50 amp breaker, but the exact size depends on your welder's amperage rating.

Here's the rule of thumb: - Check your welder's manual for its maximum output amperage and input current - Your breaker should be sized at or slightly above the input current requirement - Common setups: 30A breaker for smaller welders (130A output), 50A for larger ones (200A+ output) - Always use a dedicated circuit—don't share it with other equipment

Why this matters: An undersized breaker trips constantly and frustrates your work. An oversized one won't protect your equipment properly. Your welder's specs are your guide.

Pro tip: When in doubt, consult a licensed electrician. They can check your home's panel capacity and ensure proper grounding. It's a quick call and worth the peace of mind, especially if you're upgrading existing circuits.

If you're hiring a professional welder, they'll bring their own properly-equipped setup, so this is mainly relevant if you're building a home shop.