Dave, I can't do that wrote:
On Friday, May 25, 2018 at 9:32:00 AM UTC-7, Terry Coombs wrote:
I think you'll find that those 3 pins are neutral and 220 on the
other 2 , with either hot to the neutral at 110 .

Thanks Terry,

It is only a 3-hole twist-lock socket on the generator. Looks like I
will have to crank it up and get the meter out. I seem to recall
using it to power something 220/240v about 6-years back, but no idea
what wiring I used.



Three wires is a common generator output. You will find that you have
110 - 0 - 110 volts. Just the same that feeds into a breaker box.
The fourth wire that you need is ground. On 99.9% of generators you will
find a ground lug on the generator head or near the output panel. That
goes to a good ground.



--
Steve W.