Chassis Grounding; Connecting Power; Connecting Ac Power - Juniper J4350 Getting Started Manual

J4350 and J6350 Services Router Getting Started Guide

Chassis Grounding

To meet safety and electromagnetic interference (EMI) requirements and to
ensure proper operation, the Services Router must be adequately grounded
before power is connected. In addition to the grounding pin on the AC power
plug cord, a threaded insert (PEM nut), screw, and washer are provided on
the rear of the chassis to connect the router to earth ground.
CAUTION: Before router installation begins, a licensed electrician must attach a
cable lug to the grounding and power cables that you supply. A cable with an
incorrectly attached lug can damage the router (for example, by causing a short
circuit).
The grounding cables must be 14 AWG single-strand wire cable, and
must be able to handle amperage up to 20 A.
Each grounding lug must be a ring-type, vinyl-insulated TV14-6R lug, or
equivalent, to accommodate the 14 AWG cable.
To ground the router before connecting power, you connect the grounding cable
to earth ground and then attach the lug on the cable to the chassis grounding
point, with the screw. (See "Connecting Power" on page 86.)

Connecting Power

J4350 Services Routers have a single fixed power supply. J6350 Services
Routers have one or two field-replaceable power supplies. For more
information about the J-series power specifications, see "Power Guidelines,
Requirements, and Specifications" on page 74.
WARNING: DC-powered Services Routers are intended for installation only in
a restricted access location.

Connecting AC Power

The router must be connected to earth ground during normal operation. The
protective earthing terminal on the rear of the chassis is provided to connect
the router to ground. Additional grounding is provided to an AC-powered router
when you plug its power supply into a grounded AC power receptacle.
The AC power cord shipped with the router connects the router to earth ground
when plugged into an AC grounding-type power outlet. The router must be
connected to earth ground during normal operation.
86
Connecting Power