The Siemens EQ 125 Amp 4-Space 8-Circuit Main Lug Indoor Load Center is single phase, 3 wire and rated for a maximum of 240-Volt and has a 100,000 Air. The center is NEMA Type 1 rated for indoor use. This product has a G90 hot-dipped, galvanized-carbon-steel enclosure that helps provide corrosion protection and an additional powder coating of polyester paint, using an electrostatic process, that enhances the corrosion protection and gives a great-looking finish, free of drips and runs.