Don't have a portamig, but I'd expect about 150A or so.
Maybe you need a C type breaker, rather than a B type, if that's what you're using?
All the Best,
CJ
I understand about the 150A limit, but don't understand what setting on the welder this relates to.
There are 12 voltage steps and the range is from 15A to 185A. So... 170/11 = 15.5(ish)
So by my reckoning the steps are:
1 = 15A
2 = 30.5A
3 = 46A
4 = 61.5A
5 = 77A
6 = 92.5A
7 = 108A
8 = 123.5A
9 = 139A
10 = 154.5A
11 = 170A
12 = 185A
Is this right? If so as long as I don't go above setting 9 (2 course 3 fine) I should be okay?