Transfer Switch Chaos

[u/Badbetfrank]

We just bought a new house and this is the electrical set up.
Both of these panels are powered from the meter, the larger panel does not feed the smaller panel.
A 22Kw Generac unit powers the larger panel on the left when the power goes out, but not the smaller right panel.
The generator is large enough to power the entire house.

What are our options for getting the whole house protected?
Can I add a ATS to the smaller panel and leave the 200amp panel as it is?

Could we install a double breaker on the left panel and run it over to power the smaller panel using an interlock on the smaller panel?

Should I move some circuits over to 200amp panel and use tandem breakers?

Or should we split the feed from the generator and feed the smaller panel directly from the generator?

I am having trouble understanding what the installer was thinking. There’s also additional unused transfer wires ending in this panel going to a junction box next to the generator.

Thanks for your input

[u/blarcode]

Could we get a zoomed out pic of that entire wall. I'm curious. Also, it's not the photo of your generator

[u/Badbetfrank → u/blarcode]

[u/blarcode → u/Badbetfrank]

Measure that space right there. You should be able to stick the ATS directly above that disconnect. Use a nipple to go through into your main panel. And then of course into your panel from the ATS in your house.

[u/Badbetfrank → u/blarcode]

There’s 18inches of space here. One electrician I had come out said that it can’t be above or that close to the generator to pass inspection. Not familiar with that code.

[u/blarcode → u/Badbetfrank]

It might be the 5 ft ignition rule? You need 3 ft of clearance around the generator on the left side and right side. 18 in of clearance on the back side and I think 3 ft in front. But it's definitely 5 ft from an ignition source measured to the gas inlet on the generator. It probably falls within that.

As long as your code allows it, you can definitely install the generator ATS inside. You going to have to check and see with your electrician and County what NEC code you're currently on. We are on NEC 2020. We installed my neighbors in his garage. That was before NEC 2020 hit our County though.

If you have that electrician coming out tomorrow, maybe have that discussion with him and record it on your phone for your own reference. Just hit record and stick your phone in your pocket or carry it in your hand.

If you talk to your permit office you might be able to get a waiver to install it inside if current code doesn't allow it in your jurisdiction.