IBM 866011U Hardware Maintenance Manual - Page 189

Hot-swap power supply installation The server comes with one power supply. You can add a second power supply to provide redundant power. After you install a power supply, check the power-supply status indicators to verify that the power supply is operating properly. See "Power supplies" on page 224 for details. Caution Never remove the cover on a power supply or any part (power backplane and ac box) that has the following label attached. Hazardous voltage, current, and energy levels are present inside the power supplies, power backplane, and ac box. There are no serviceable parts inside the power supplies, power backplane, or ac box. Refer to the following illustration while performing the steps in this procedure. Note You do not need to turn off the power to the server to install hot-swap power supplies. Netfinity 5500 - Type 8660 181