I haven't seen this done in quite awhile so I thought I'd pick some of your brains. I'm on a large remodel and we are doing a 400Amp panel upgrade with a 200Amp sub-panel directly behind it in the garage. The owner just notified me (change order) that he would like to have a generator to back up the power if it goes out. He isn't interested in powering the entire house , just some lights here and there. I figured we would just back up power to the sub-panel (200A).

I'm curious how the connections would work from the transfer switch to the sub-panel. If someone wouldn't mind giving the a general feel for how this needs to be wired up that would be great.

Thanks,
Byron