I'm not sure what is most common. Most people with a generator are only wanting to run the fridge, furnace and a couple pumps, all this can be arranged to run from a single 120v phase, and finding a 120v outlet one the right phase near the generator is easy enough. In particular no need to move the dryer when doing this. However larger generators have 240v and it is easy enough to plug them in. The only people I know who have done this used a 240v welder outlet, for whatever that is worth.
Personally I'm glad my house as an automatic transfer switch. power goes off, generator starts, and lights go back on. Last time the power went it was planned so I had the generator running and the transfer happened fast enough for my servers to stay up.
Personally I'm glad my house as an automatic transfer switch. power goes off, generator starts, and lights go back on. Last time the power went it was planned so I had the generator running and the transfer happened fast enough for my servers to stay up.