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Hello, 3 phase requires that the utility company fit a 3 phase transformer on the pole (or in their vault), you will pay more for the service, and gain nothing because you still have the same wire size limitations and 100amp panel limitations.
It is most likely possible that you can increase your panel size to 150 or 200 amps with the utilities approval (depends on which pole transformer they have in place and how many other houses are on it etc.)
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