Juniper EX4600 Series User Manual

Connecting Earth Ground to an EX4600 Switch
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect the EX4600 switch to earth ground before you
connect it to power.
For installations that require a separate grounding conductor to the chassis, you must
attach a protective earthing terminal bracket on the EX4600 switch left front mounting
bracket to connect to the earth ground (see Figure 21 on page 147).
Before you connect earth ground to the protective earthing terminal of a EX4600 switch,
ensure that a licensed electrician has attached an appropriate grounding lug to the
grounding cable.
CAUTION: Using a grounding cable with an incorrectly attached lug can
damage the switch.
NOTE: Mount your switchin the rackor cabinetbefore attachingthe grounding
lug to the switch. See “Mounting an EX4600 Switch in a Rack or Cabinet” on
page 141.
Ensure that you have the following parts and tools available:
•
Protective earthing terminal bracket—This bracket attaches to the EX4600 switch
chassis through the left front mounting bracket, providing a protective earthing terminal
for the switch.
•
Grounding cable for your EX4600 switch—The grounding cable must be 14 AWG
(2 mm²), minimum 90° C wire, or as permitted by the local code.
•
Grounding lug for your grounding cable—The grounding lug required is a Panduit
LCD10-10A-L or equivalent.
•
Two M4 hex nuts with integrated washers—Two nuts and washers are used to secure
the grounding lug to the grounding lug bracket protective earthing terminal. Four nuts
are provided in the accessory kit.
•
7-mm wrench or socket with driver to attach the two nuts.
An AC-powered EX4600 switch chassis gains additional grounding when you plug the
power supply in the switch into a grounded AC power outlet by using an AC power cord
appropriate for your geographical location. See “AC Power Cord Specifications for an
EX4600 Switch” on page 79.
To connect earth ground to a EX4600 switch:
Copyright © 2014, Juniper Networks, Inc.146
EX4600 Switch Hardware Guide

Juniper EX4600 Series Specifications

General

Product Series	EX4600
10GbE ports	24 or 48
Cooling	Front-to-back or back-to-front airflow
Rack Units	1 U
Virtual Chassis	Up to 10 members
MAC address table size	288, 000 entries
Memory	8 GB DRAM
Layer 3 Routing	Yes
AC Power Input	100-240V AC
Ports	24 or 48 x 10GbE ports
40GbE ports	4
100GbE ports	0
Power Supply	Dual redundant, hot-swappable AC or DC
Jumbo frames	9216 bytes
Operating temperature	0°C to 45°C
Input voltage	100-240 VAC, -40 to -72 VDC
Operating relative humidity	5% to 90% noncondensing
Fans	Redundant
JUNOS OS	Junos OS
Storage	16 GB flash
DC Power Input	-40 to -72 VDC