My Gas Generator Set-up

I have been using two 3k generators that I back feed through outlets. One outlet is on one leg of the panel and one on another.
Eventually I will set up a transfer switch.

I recently ran a 220 line out to the garage for an arc welder I bought.

MY QUESTION:
If I use one generator and back feed through the 220 outlet I should energize both legs, Right?

#1 - If you are going to feed 240 to the house, the generator should have a 240/120 outlet. They are usually twist lock deals like so:



#2 I'd recommend against just back feeding a regular outlet, as to do that you are giong to have to make a double male end, a.k.a. suicide cord. You might never forget to plug it in before starting the gen, but the one time you do forget will be the last. Better option is to get a dedicated generator inpout box so you can use a regular male to female cord.


#3 For the same reason as above, if you are planning to backfeed the panel get an interlock breaker. Its cheap (under $100) insurance. All it takes is a moment of forgetfulness, accidentally leaving he main breaker on when you hook up the genny and you can kill a lineman.