Juniper E Series Hardware Manual page 47

Installing E-series Routers
CAUTION: Evaluate the overall loading of the branch circuit before you install
any equipment into a rack.
WARNING: Connect the E-series router or rack to ground (earth), and ensure that
a reliable grounding path is maintained in the rack.
WARNING: Do not work on the system or connect or disconnect cables during
lightning activity.
WARNING: Be sure circuit breakers for the power source are in the OFF position
before attaching power cables.
WARNING: Before servicing the E-series router, turn off the power.
WARNING: Remove jewelry (including rings, necklaces, and watches) before
working on equipment that is connected to power lines. Metal objects heat up
when connected to power and ground and can cause serious burns or become
welded to the terminals.
WARNING: Do not insert any metal object, such as a screwdriver, into an open slot
or the backplane. Doing so may cause electric shock and serious burns.
WARNING: The ERX-310 router AC model has more than one power-supply cord.
Disconnect 2 power cords BEFORE servicing to avoid electric shock.
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Rack-Mounted Installation