10.1 Power and cooling 10.1.1 Power requirements and consumption Power requirements The z14 ZR1 server is a 19-inch, single-frame system that supports installation on a raised  floor or non-raised floor.  The following features are available to allow I/O cables and line cords to exit the frame from  the top, bottom, or both sides of the frame: This section describes the power requirements and consumption for z14 ZR1 servers. The z14 ZR1 is designed with a fully redundant power system. It has one or two intelligent  Power Distribution Unit (PDU) pairs to power the components of the server. To make full use  of the redundancy that is built into the server, the PDUs within one pair must be powered from  different power distribution panels. In that case, if one PDU in a pair fails, the second PDU  ensures continued operation of the server without interruption. The second PDU pair is installed when the second PCIe+ I/O drawer or the 16U Reserved  feature is ordered. For more information, see Figure 10-1 and Table 10-1 on page 345. Power cords for the PDUs are attached to 1-phase, 50/60 Hz, 200 - 240 V AC power. Figure 10-1 The PDU pairs in the rear of the frame 344  IBM 14 Model ZR1 Technical Guide GLYPH<SM590000> Top Exit cabling feature (FC 7917). For more information, see 10.3.2, “Top Exit cabling  feature (optional)” on page 350. GLYPH<SM590000> Bottom Exit cabling feature (FC 7919). For more information, see 10.3.4, “Bottom Exit  cabling feature” on page 352.