Well 2800 watts at 115V is 24 amps, so you need a 30 amp outlet to plug it in to and cordage good for 25 amps or more. And the current might be higher with the line voltage actually being 125 or so. So you really need 10 gauge wire. On a 30 amp breaker at the breaker panel, leading to a 30A outlet where you are going to plug it in.