AN1620 datasheet(24/50 Pages) ARISTA

24 / 50 page

4.2.2.1

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.

1. 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 mm2).

•

Primary Ground Wire Size: 4 – 6 AWG (21.2 mm

2 to 13.3 mm2) per power supply.

•

The conductors are copper.

Figure 17: Lugs Wiring Terminations

1 Insulated wire

3 Lug

5 1/2”

2 Heat-shrink tubing

4 1/4”

6 5/8”

2. Use agency-approved compression (pressure) lugs for wiring terminations with a single 5/16"

mounting hole. Two-hole lugs should have 1/4" mounting holes on 5/8" centers.

3. 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 lug’s barrel and the wire's insulator.

4. Shrink the tubing with a heat gun.

4.2.2.2

Connecting the PWR-1611-DC Power Supply

The PWR-1611-DC power supply connects to a circuit that provides -48 V to -60 V and 39 A. Ensure

the wires connecting the DC power supply to the power source meet the following:

•

DC Input Wire Size: AWG 6 (13.3 mm

2) or larger as appropriate.

•

Safety Ground Wire Size: AWG 6 (13.3 mm

2) or larger as appropriate.

•

Wire Terminal (Lug): 2-hole lug, 6-8 AWG, #8 (4 mm) screw.

•

Over-current protection: 40 A.

Important:

Ensure power is removed from DC circuits before performing any installation actions. Locate

circuit breakers or fuses on DC power lines servicing the circuits. Turn off the power line

circuits or remove the fuses.

AN1620 Datasheet(PDF) 24 Page - Arista Networks, Inc

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