Dell OptiPlex GX240 - Manual (Page 14)

12 Setup and Quick Reference Guide
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When Using Your Computer System
As you use your computer system, observe the following safety guidelines.
CAUTION: Do not operate your computer system with any cover(s)
(including computer covers, bezels, filler brackets, and front-
panel inserts) removed.
• To help avoid damaging your computer, be sure the voltage selection
switch on the power supply is set to match the AC power available at
your location:
– 115 volts (V)/60 hertz (Hz) in most of North and South America
and some Far Eastern countries such as South Korea and Taiwan
– 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan
NOTE: The voltage selection switch must be set to the 115V position
even though the AC supply in Japan is 100 V.
– 230 V/50 Hz in most of Europe, the Middle East, and the Far East
Also be sure your monitor and attached peripherals are electrically
rated to operate with the AC power available in your location.
NOTE: Auto-select power supplies do not require a voltage selection
switch. Your power supply may not have this switch.
• To help prevent electric shock, plug the computer and peripheral
power cables into properly grounded power sources. These cables are
equipped with three-prong plugs to help ensure proper grounding. Do
not use adapter plugs or remove the grounding prong from a cable. If
you must use an extension cable, use a three-wire cable with properly
grounded plugs.