Extreme Networks Summit X150 Series Hardware Installation Manual page 214

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Summit X450a-24xDC
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Summit X450a-48tDC
You must adhere to specific safety requirements when you connect to a DC power source for one of
these Summit switches.
Note
For centralized DC power connection, these products are intended to be installed in
Restricted Access Locations (dedicated equipment rooms, equipment closets, or the like) in
accordance with Articles 110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA
70.
An optional redundant power supply, the EPS-150DC, is available for use with the Summit
DC-powered switches. When the EPS-150DC is used with a DC-powered Summit switch, the
power supplies (internal and redundant) are fully fault tolerant and load-sharing. If one power
supply fails, the other power supply will provide sufficient power to operate the switch. See
EPS-150DC External Power Module (with EPS-T2)
Connecting the Internal DC Power Supply to the DC Source Voltage
Before you connect the switch to a power source, complete the physical installation of the switch in the
equipment rack.
If you are installing a Summit DC-powered switch, you must ground the chassis before connecting the
switch to the DC source voltage. (See
214.)
Grounding a Summit X250 or X450 DC-Powered Switch
Before you connect the power input cable to a Summit DC-powered switch, you must ground the
chassis, following the instructions in this section.
Gather the following materials to ground the Summit X250 or X450 DC-powered switch:
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Stranded copper wire cable, minimum size 14 AWG, maximum size 6 AWG
The wire should be long enough to reach from the installed switch to the facility ground point
•
Torque screwdriver with 1/4-inch flat blade
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Additional grounding hardware appropriate to the earth ground connection at your site
Warning
Be sure to connect the chassis ground wire before you connect any power cables.
To ground the switch:
1 At one end of the wire, strip the insulation to expose 1/2 inch (12 mm) of bare wire.
2 Identify the grounding lug on the back of the switch.
The grounding lug is next to the edge of the back panel, identified by the international symbol for
earth ground. Depending on the switch model, the grounding lug may be on either side.
Summit Family Hardware Installation Guide
for further details.
Grounding a Summit X250 or X450 DC-Powered Switch
Installing Summit Family Switches
on page
214