You mean a regular wall electrical outlet or a special line connected to your circuit breaker box?
No. Yank your meter off or.flip the whole house breaker. It works just like a phone line. Any outlet will do. Ive been throught a couple. If you need more easy to understand tech info ill post it from my laptop not phone.
Your amp.load depends on several factors sepending.on your ext cord size and length. Your house has two separate circuits
Our portable generator is 12.5kw and i have a electrical cord I made that hooks up from genset 220 to dryer plug outlet in the garage. Feeds the house and absorbs the surges from hvac, fridge etc just fine. Its a diesel genset so in an emergency I can feed it from the bed tanks on my diesel trucks if we run short of fuel if outrage is long term.