That's a god way to electrocute a poor lineman while he is trying to restore your power. Having a generator connected to the house is a fine thing but do it to code man. Use an isolation transformer so you don't kill someone.
If one is attentive this can be done through the drier or any other 220v plug if the panel is configured for it before you plug into the aux. power source. The genny has to be capable as well.
Safety 1st.
When I 1st started posting in this thread I mentioned I powered up my house through the dryer plug. The ensuing dog pile was pretty deep.
Thing is I know wiring. Very well actually as I wired both the houses on the compound and have been around electrical my whole life. 1st step is drop the main any any other circuit's you will not need in the current emergency. In my panels they are well marked. We have ran the drill a few times.
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