Product Overview 15
General Precautions for Rack-Mountable Products
Observe the following precautions for rack stability and safety. Also, refer to “Installing in a Rack” on page 22 and the rack installation documentation accompanying the rack for specific caution statements and procedures.
zSystems are considered to be components in a rack. Thus, component refers to any system as well as to various peripherals or supporting hardware.
Caution: 
CAUTION: Installing systems in a rack without the front and side stabilizers installed could cause the rack to tip over, potentially resulting in bodily injury under certain circumstances. Therefore, always install the stabilizers before installing components in the rack. After installing system/ components in a rack, never pull more than one component out of the rack on its slide assemblies at one time. The weight of more than one extended component could cause the rack to tip over and may result in serious injury.
zBefore working on the rack, make sure that the stabilizers are secured to the rack, extended to the floor, and that the full weight of the rack rests on the floor. Install front and side stabilizers on a single rack or front stabilizers for joined multiple racks before work- ing on the rack.
zAlways load the rack from the bottom up, and load the heaviest item in the rack first.
zMake sure that the rack is level and stable before extending a component from the rack.
zUse 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.
zAfter a component is inserted into the rack, carefully extend the rail into a locking position and then slide the component into the rack.
zDo 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.
zEnsure that proper airflow is provided to components in the rack.
zDo 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: 
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.