60 Amp 240-Volt Non-Fused Indoor General-Duty Double-Throw Safety Switch

Depends on the load. It might be problematic for an electric vehicle charging station, for instance, because that requires a dedicated circuit. And both loads must specify the same breaker size. Both problems could be solved by using a small subpanel, optionally with a gen interlock. Cheaper that way too.

Probably not but ask your local inspector. Car chargers require a dedicated circuit. Instead use a subpanel here to switch between loads. 2 breakers, add a "generator interlock" between them if you don't want to upgrade your feed, so only one breaker can be on. Square D QO has a $25 interlock (QO2DTI). It'll be cheaper, too.

It is a 3-pole switch. You MUST switch neutral when dealing with 30A-scale portable type generators. The generator's GFCI will force this anyway. Ground must bypass the switch and be always connected. Do Not connect neutral to ground here.

15-1/2 in. Tall x 10-1/2 in. Wide x 5-1/2 in. Deep.

I have my doubts. But why bother? You can do it Code legal for sure with a subpanel for 1/3 the price. Get a QO 6-8 space panel so you can slap on a $25 QO2DTI interlock if the inspector complains. Siemens/Murray panels also have a cheap interlock.

As long as you do not exceed 30amps at 240volts it should work fine. I use mine to switch between the power from my utility company and my generator.

Yes, there are two lines in and one load out. the load out connections are located halfway between the load in connections, basically right under the switch bar.

Yes it is 3 phase.

Doesn't hurt to switch neutral, and it's often required. For generators, it's required.

I use it to separate 2 generators.