Required wires• One UL 10 AWG, 2 m maximum (stranded) black wire [–(48–60) V DC]• One UL 10 AWG, 2 m maximum (stranded) red wire (V DC return)• One UL 10 AWG, 2 m maximum green/yellow, green with a yellow stripe, stranded wire (safetyground)Removing a DC power supply unitPrerequisitesWARNING: For equipment using –(48–60) V DC power supplies, a qualified electrician mustperform all connections to DC power and to safety grounds. Do not attempt connecting to DCpower or installing grounds yourself. All electrical wiring must comply with applicable local ornational codes and practices. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow all safety instructions that came with the product.CAUTION: The system requires one power supply for normal operation. On power-redundantsystems, remove and replace only one power supply at a time in a system that is powered on.NOTE: You may have to unlatch and lift the optional cable management arm if it interferes withpower supply removal. For information about the cable management arm, see the system’s rackdocumentation.Steps1. Disconnect the power wires from the power source and the connector from the power supply youintend to remove.2. Disconnect the safety ground wire.3. Press the release latch and slide the power supply out of the chassis.Figure 45. Removing and installing a DC power supply1. release latch 2. power supply status indicator3. power supply 4. connector104
