Voltage-Selection Switch; Extension Cords And Related Devices - Lenovo ThinkStation D20 Safety And Warranty Manual

Do not use any power cords where the electrical contacts on either end show
signs of corrosion or overheating or where the power cord appears to have been
damaged in any way.

Voltage-selection switch

Some computers are equipped with a voltage-selection switch located near the
power-cord connection point on the computer and some computers do not
have a voltage-selection switch. Before you install your computer or relocate
your computer to another country or region, you must be certain that you have
matched your computer to the voltage available at your electrical outlet.
CAUTION:
You must know the voltage of the electrical connection (outlet) where your
computer will be connected. If you do not know the voltage, contact your
local electric company or refer to official Web sites or other literature for
travelers to the country or region where you are located.
If your computer has a voltage-selection switch, you must set the switch to match
the voltage available at your electrical outlet. Setting the voltage-selection switch
incorrectly will cause the computer to malfunction and might cause permanent
damage to the computer. Do not connect the computer to an electrical outlet until
you have verified that the voltage-selection switch setting matches the voltage
available at the electrical outlets.
If your computer does not have a voltage-selection switch, inspect the
voltage-rating label on the bottom of the computer and note the following:
• If the voltage-rating label shows a range of either "100-127 V" or "200-240 V,"
you must ensure that the voltage provided at the electrical outlet matches the
voltage rating on the computer label. If it does not match, do not attempt to
connect the computer to the electrical outlet, unless an external device such
as a voltage-converting transformer is used.
• If the voltage-rating label shows a dual range of "100-127 V" and "200-240
V," this signifies that the computer is suitable for worldwide operation and
the computer will automatically adjust to the voltage at the electrical outlet
regardless of the country or region where the computer is being connected.

Extension cords and related devices

Ensure that extension cords, surge protectors, uninterruptible power supplies, and
power strips that you use are rated to handle the electrical requirements of the
product. Never overload these devices. If power strips are used, the load should
not exceed the power strip input rating. Consult an electrician for more information
if you have questions about power loads, power requirements, and input ratings.
Chapter 1. Important safety information
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