What breaker for 230 volt 225 amp AC 125 amp Dc lincoln

Another factor is service distance to your utility. They tell me, (and I haven't looked in my electrical book), that there's a 10% loss in a 100ft. So you may not get the 100 Amp mentioned if your line is too long. If your not sure about the
volt drop, up the gauge of your service wire. That would be a #8 instead of a #10 for your 30Amp
service. That should make up for your service loss.

I am exactly 100Ft from my house panel
and I have a 40Amp breaker. It will sustain a continuous weld at 150Amps without tripping, but
I imagine that I'm at the limit.

You'll need quite a hefty service wire to
carry your 60Amps if you want to go max. I forget
the gauge but I imagine it would be something like
a #6 wire.

Make sure you break at the source panel. Any short in your underground service or overhead will be caught at the breaker.

Since very often you end up with at least lights, and grinders & more stuff by a welder, you probably do want a 60 amp, with good thick wiring to it.

--->Paul

Maxmium breaker is 125% of duty amps found on the welder or other equipment.

A couple cases of beer buy alot of proffessionl help for this type of job or trade what for you do best.

T_Bone