Preparing The Equipment Racks - Juniper ERX - RELEASE 11.1.X HARDWARE GUIDE 03-23-2010 Hardware Manual

ERX 11.1.x Hardware Guide
WARNING: Three people are required to install the router in a rack: two to lift the
system into position and one to screw it to the rack.
CAUTION: Evaluate the overall loading of the branch circuit before you install any
equipment into a rack.
WARNING: Connect the 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 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 can cause electric shock and serious burns.
WARNING: The ERX310 router AC model has more than one power-supply cord.
Disconnect two power cords before servicing to avoid electric shock.

Preparing the Equipment Racks

Following your installation plan, use a tape measure and marking pen to measure
and mark space on each equipment rack for each router component. For horizontal
spacing, follow Network Equipment Building System (NEBS) requirements. If you
choose not to install a plenum, be sure to include 2 U of space between each chassis
for proper exhaust. A plenum, however, is highly recommended.
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Rack-Mounted Installation