D-Link DES-1048G Manual - page 8

D-Link DES-1048G Unmanaged Layer 2 Ethernet Switch

Safety Instructions (continued) 

Always load the rack from the bottom up, and load the heaviest item in the rack first. 

Make sure that the rack is level and stable before extending a component from the rack. 

Use caution when pressing the component rail release latches and sliding a component into or out of a rack; the 

slide rails can pinch your fingers. 

After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide the 

component into the rack. 

Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should not 

exceed 80 percent of the branch circuit rating. 

Ensure that proper airflow is provided to components in the rack. 

Do not step on or stand on any component when servicing other components in a rack. 

NOTE: 

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.

Protecting Against Electrostatic Discharge 

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. 

You can also take the following steps to prevent damage from electrostatic discharge (ESD): 

1.  When unpacking a static-sensitive component from its shipping carton, do not remove the component 

from the antistatic packing material until you are ready to install the component in your system. Just 

before unwrapping the antistatic packaging, be sure to discharge static electricity from your body. 

2.  When transporting a sensitive component, first place it in an antistatic container or packaging. 

3.  Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and 

workbench pads and an antistatic grounding strap. 

viii