Safety and Compliance Information for Server, Storage, Power, Networking, and Rack Products

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:
◦ 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 a dedicated AC branch circuit
(AC mains). Connection should only be performed by a licensed electrician 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.
8 Safety precautions