2-6
Grounding the device
CAUTION:
•
Correctly connecting the grounding cable is crucial to lightning protection and EMI protection.
When you install and use the device, first ground the device reliably.
•
Ensure a minimum resistance of 5 ohms between the device and the ground.
A grounding cable is provided with the device.
Grounding the device through the grounding terminal on the rack
IMPORTANT:
Make sure the rack is reliably grounded before grounding the device.
To ground the device through the grounding terminal on the rack:
1.
Remove the grounding screw from the grounding hole in the rear panel of the chassis.
2.
Use the grounding screw to attach the ring terminal of the grounding cable to the grounding
hole. See
3.
Remove the hex nut from a grounding post on the grounding terminal of the rack.
4.
Use needle-nose pliers to bend a hook at the other end of the grounding cable. Attach the
hook to the grounding post and use the hex nut to secure the hook to the post.
Figure2-7 Connecting the grounding cable to the device
Grounding the device with a grounding strip
If a grounding strip is available at the installation site, connect the grounding cable to the grounding
strip.
To ground the device with a grounding strip:
1.
Remove the grounding screw from the grounding hole in the rear panel of the chassis.
2.
Use the grounding screw to attach the ring terminal of the grounding cable to the grounding
hole.
3.
Remove the hex nut from a grounding post on a grounding strip.
4.
Use needle-nose pliers to bend a hook at the other end of the grounding cable. Attach the
hook to the grounding post and use the hex nut to secure the hook to the post.
Grounding the device by burying a grounding conductor in the earth ground
If the installation site does not have any grounding strips, but earth ground is available, hammer a
0.5 m (1.64 ft) or longer angle iron or steel tube into the earth ground to serve as a grounding