The first box on the power center is non-GFI for the water pumps. The number two box is a
GFI that controls the rest of the power center. The entire unit is wired with 12/2 wire and designed to handle up to 20 amps of power. The plug that it will be attached to is an independent line in the house wiring, wired as a 20 amp circuit. Once I get things together I will put the power center in the DYI forum. If you need instructions sooner
PM me and I will send it to you.