Transfer Switch; Type Automatic, Standard Transition; Voltage Rating 480 Volt at 60 Hertz 3 Phase; Main Current Rating 400 Amp; Short Circuit Rating 50000 Amp; Wire Type Aluminum/Copper; Wire Size (1) 4 AWG to 600 MCM; Enclosure NEMA 3R Aluminum, Indoor/Outdoor; Height 48.1"; Width 24"; Depth 13.5"; Application Generator; Approval UL 1008; Configuration 3-Pole 4-Wire, Solid Neutral; Inclusions/Features Interface Board, Contactor Electrically and Mechanically Interlocked, Double Throw Inherently Interlocked Design, Silver Alloy Main Contacts, Service Entrance Models; Optional Accessories Status Indicator Kit, Load Shed Kit; Operating Temperature -4 to 158 Deg F; Humidity 5 to 95 Percent; Weight 68 Lb; Warranty 5 Year Limited