Arista DCS-7020TR-48, Быстрый старт

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20 Quick Start Guide: 7000 Series 1 RU-Gen 3 Data Center Switches
Connecting Power Cables Chapter 4: Cabling the Switch
4.2.3 PWR-1900-DC Power Supply
Figure 4-5: PWR-1900-DC power supply
4.2.3.1 Wire and Lug Preparation
Before performing any installation actions, ensure power is removed from DC circuits by turning off the
power line servicing the circuits. Prepare the stranded wiring before you begin a DC power installation.
Step 1 Attach an ESD grounding strap.
Step 2 Stranded copper wiring is required.
• Commercially available 4 to 6 AWG wire is recommended for installations in the U.S.
• Wire size should meet local and national installation requirements.
• Grounding wires and grounding lugs are not supplied.
• Strip the wires to the appropriate length for the lugs.
The wires connecting the DC power supply to the power source must meet the following requirements:
• DC Input Wire Size: 4 – 6 AWG (21.2 mm
2
to 13.3 mm
2
).
• Primary Ground Wire Size: 4 – 6 AWG (21.2 mm
2
to 13.3 mm
2
) per power supply.
• The conductors are copper.
Step 3 Use agency-approved compression (pressure) lugs for wiring terminations.
Step 4 Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
• The lugs must be crimped with the proper tool.
• The tubing should extend over the lugs barrel and the wire's insulator.
• Shrink the tubing with a heat gun.
4.2.3.2 Connecting a DC Power Supply to Power Source
To connect a DC power supply to power source:
Step 1 Prepare the stranded wiring, see Section 4.2.3.1: Wire and Lug Preparation .
Step 2 Attach the appropriate lugs to the source DC wires.