Grounding a Summit X250e or X450a 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 X250e or X450a DC-powered switch:

  • 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
  • Additional grounding hardware appropriate to the earth ground connection at your site
    Warning

    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: ../Graphics/earth_ground.png

    On a Summit X250e series switch, the grounding lug is on the right side.

    On a Summit X450a series switch, the grounding lug is on the left side.

  3. Insert the stripped wire into the grounding lug.
  4. Using a straight-tip torque screwdriver, tighten the retaining screw to 20 in‑lb (2.25 N m).
    See the following figures.
    Click to expand in new window
    Attaching the Ground Wire to a Summit X250e Series Switch
    ../Graphics/SH_069_ground_X250e.svg
    Click to expand in new window
    Attaching the Ground Wire to a Summit x450a Series Switch
    ../Graphics/SH_061_ground_switch.svg
  5. Connect the other end of the wire to a known reliable earth ground point at your site.
After grounding the switch, follow the instructions in Connecting the X250e or X450a DC Wiring Harness to the DC Source Voltage.