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As I said I would not recommend it for someone who is unsure of anything .
I agree your method would work as long as you limit total current draw to the amount the circuit breaker for the drier outlet is rated for. But the issue of being there personally to handle the switchover would trouble me considering you have frequent power outages.
At my house, I'm only interested in running either the sump pump in the basement or the furnace depending on circumstances (whether it's raining or whether it's very cold). I have an 1,850 watt continuous generator.
To run the sump pump (by far my biggest worry if we have a power outage), I can just run an extension cord since it plugs into a standard outlet.
I was just noodling how to get the furnace hooked up when I saw this thread and it looks like the Reliance manual transfer switch others have posted would work great! It also looks like something I could easily install myself and DW could handle the changeover. I think I'll order one.