Power distribution cabinet supports 20 to 60kVA 3-phase UPS power distribution in critical data center equipment racks. Full size rack enclosure with pre-installed 42-pole circuit breaker panel supports 3-phase 208V and single phase 208V and 120V output via optional corded receptacle whips. Breaker panel includes 225A 3-pole main breaker, ground and neutral bars, plus 1/2 and 3/4-inch knockouts. Rack enclosure offers secure front and rear doors, removable side panels and shares common dimensions and overhead wiring tray accessories as Tripp Lite SR42UB rack enclosures. Compatible with Tripp Lite SUBB-series breakers, SUWL-series corded receptacle whips and full line of compatible basic, metered, monitored and switched PDUs to support variety of advanced network configurations.