Ok. I can’t wrap my head around a single pole 220v breaker. This only has 3 wires. Hot,Neutral and ground. I opened up the case expecting to see a transformer with two hot Leeds. Nope. ???
Do not ever weld galvanized inside If you do try to avoid at all cost but if you do you need more than proper ventilation you need 100% It stays in your lungs it will never leave The more you have the less function you will have but it won’t be noticeable for years later. It’s irreversible
