The SLP-338 is a 2U high 19" rack mount (220 Volt, 30 Amp, three phase) power distribution bar. This model has a NEMA L21-30 for a Main Inlet connector. There are six independent 20 amp breakers located on the front panel. Each of the X1 & Y1 breakers distribute power to a T-slot duplex U-ground receptacle located on the rear panel. In addition, the X2 & Y2 breakers distribute power to a split T-slot duplex U-ground receptacle located on the rear panel which is also parallel connected to a split T-slot duplex U-ground convenience receptacle located on the front panel. The remaining two 20 Amp breakers, Z1 & Z2, on the third phase, distribute power to a split T-slot duplex U-ground receptacle located on the rear panel.