Reference Guide

8 Unmanaged Switches System Information Guide
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• Do not step on or stand on any component when servicing other components in a
rack.
CAUTION: A qualified electrician must perform all connections to DC power and
to safety grounds. All electrical wiring must comply with applicable local or
national codes and practices.
CAUTION: Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate
electrical inspection authority or an electrician if you are uncertain that
suitable grounding is available.
CAUTION: The system chassis must be positively grounded to the rack cabinet
frame. Do not attempt to connect power to the system until grounding cables
are connected. Completed power and safety ground wiring must be inspected by
a qualified electrical inspector. An energy hazard will exist if the safety ground
cable is omitted or disconnected.
Modems, Telecommunications, or Local Area Network Options
• Do not connect or use a modem during a lightning storm. There may be a risk of
electrical shock from lightning.
• Never connect or use a modem in a wet environment.
• Do not plug a modem or telephone cable into the network interface controller (NIC)
receptacle.
• Disconnect the modem cable before opening a product enclosure, touching or
installing internal components, or touching an uninsulated modem cable or jack.
Caution: Safety Instructions (continued)
When Using Your System
Protecting Against Electrostatic Discharge
NOTICE: Only a certified service technician should perform repairs on your system. Damage
due to servicing that is not authorized by Dell is not covered by your warranty.
Static electricity can harm delicate components inside your system. To prevent static
damage, discharge static electricity from your body before you touch any of the electronic
components, such as the microprocessor. You can do so by periodically touching an
unpainted metal surface on the chassis.