Connecting the Ground Cable
Context
Grounding the switch helps protect it from lightning, electromagnetic interference, and electrostatic discharge, and is the prerequisite for a PoE switch to provide power for a PD.
The ground cable can be connected to a ground bar or a ground point on the cabinet or rack. The following procedure uses the connection to a ground point as an example.
The switch
must be grounded before it is powered on. This protects operators
from electric shock and avoids equipment damage caused by lightning,
electromagnetic interference, or electrostatic discharge.
If a cabinet or rack has a protective coating, remove
this coating from around the ground point to ensure a reliable connection.
Tools and Accessories
- ESD wrist strap or ESD gloves
- Phillips screwdriver
- Ground cable (one per switch)
- M4 screw (already installed on the switch ground point)
- M6 screw (one, purchased separately)
The ground cable is included in the installation
accessory package.
Procedure
- Wear an ESD wrist strap or ESD gloves. When wearing an ESD wrist strap, ensure that it is in close contact with your wrist and grounded properly.
- Use a Phillips screwdriver to remove the M4 screw from the ground point on the switch, as shown in Figure 1. Keep the M4 screw for later use.
- Attach the M4 lug of the ground cable to the ground point
on the switch with the M4 screw you removed in step 2. Tighten the
M4 screw with a torque of 1.4 N•m. See Figure 2.
The ground cable has an M4 lug at one end and an M6 lug at the other end. The M4 lug is the smaller of the two.
- Attach the M6 lug of the ground cable to a ground point on the cabinet or rack with an M6 screw. Tighten the M6 screw with a torque of 4.8 N•m. See Figure 3.
