Power supplies

Hot-plug power supplies are not designed to be removed or installed with AC power connected to the power supply. To reduce the risk of electric shock or damage to the equipment when handling hot-plug power supplies:

•Install the power supply before connecting the power cord to the power supply.

•Unplug the power cord before removing the power supply from the product.

•If the system has multiple sources of power, you must unplug all AC power cords from the power supplies to completely disconnect power from the system.

Verify that the external power source connected to your product matches the type of power source indicated on the electrical ratings label. If you are not sure of the type of power source required, consult your HP authorized service provider or local power company.

Uninterruptible power supply (UPS) products

•To reduce the risk of electric shock and/or equipment damage when installing or servicing UPS products:

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The installation of options and routine maintenance and service of UPS products must be performed by trained service technicians who are knowledgeable about the procedures, precautions, and hazards associated with AC power products.

Hardwired UPS products require a direct connection to an AC branch circuit (AC mains). Connection should only be performed in accordance with National Electrical Code (NFPA70) Article 310 in North America or the equivalent local and national wiring regulations.

Use a Lockout/Tagout procedure to isolate hardwired UPS products from AC power before servicing the product or replacing a non-hot-plug component.

Do not operate a UPS that is disconnected from AC power. Use the TEST/ALARM RESET button to test the batteries. Disconnect all protected loads before disconnecting the UPS from AC power.

Pluggable UPS products must be disconnected and unplugged from AC power before servicing the product or replacing a non-hot-plug component.

Do not overload the output of the UPS. The total connected load should not exceed the rated output.

To reduce the risk of electric shock due to high leakage currents, ensure that there is a reliable grounded (earthed) connection before connecting power distribution products to AC power.

If a large number of products will be connected to a single UPS, it may be necessary to conduct an evaluation of the installation to verify the total amount of leakage current. The total combined leakage current should not exceed 5 percent of the input current for the UPS and associated load.

8Safety precautions