Arista DCS-7304, Быстрый старт

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22 Quick Start Guide: 7300 Series Modular Data Center Switches
Cabling the DC Power Supply Chapter 4: Powering the Modular Switch
4.2.1 DC Power Adapter Installation
Before you begin, refer to the Arista Networks document Safety Information and Translated Safety
Warnings available at:
http://www.arista.com/support/product-documentation.
Preparation
Before performing any installation actions, ensure power is removed from DC circuits by turning off the
power line servicing the circuits.
Step 1 Attach an ESD grounding strap.
Step 2 Stranded wiring is required. Strip the wires to the appropriate length for the terminals. Wire
size should meet local and national installation requirements. Grounding wires and grounding
lugs (M6 x 1.0) are not supplied. Commercially available 2 to 4 AWG wire is recommended for
installations in the U.S
Step 3 Use approved ring or spade type lugs wiring terminations.
Step 4 Crimp the ground wire and pressure insulation (heat shrink tubing) onto the ground lug before
installation.
• Check the terminations for the appropriate wire size. Use a ground wire of at least 2 – 4
American Wire Gauge (AWG). Use only copper wire.
• Crimp each lug to the end of each power cable. The ground wire should have an
agency-approved crimped connector attached.
• Use pressure connectors at wire terminations.
• The connector must be crimped with the proper tool, allowing it to be connected to the
ground screws on the adapter.
• Place heat shrink tubing over each lug and power cable Be sure to allow for a minimum
1/4" overlap over any existing insulation or connectors.
4.2.1.1 Connecting the Power Cable Lug to the Terminal Studs
Ensure the wires connecting the DC power supply to the power source meet the following:
• DC Input Wire Size: 2 – 4 AWG (26.7 mm
2
to 21.2 mm
2
)
• Tightening Torque: 5.1 N•m (45 in. lbs.)
• Primary Ground Wire Size: 2 – 4 AWG (26.7 mm
2
to 21.2 mm
2
) per power supply
• Overcurrent protection: 100A.
Step 1 Remove the clear plastic cover protecting the terminal studs on the adapter by lifting the small
center tab. While releasing the tab, slide the cover off the adapter until the terminal studs are
exposed.
Figure 4-5: Remove the clear plastic cover from the adapter