MX480 Chassis Grounding Points Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the router must be adequately grounded before power is connected. To ground AC-powered and DC-powered routers, you must connect a grounding cable to earth ground and then attach it to the chassis grounding points using the two screws provided.
Two threaded inserts (PEM nuts) are provided on the upper rear of the chassis for connecting the router to earth ground. The grounding points fit UNC 1/4–20 screws (American). The grounding points are spaced at 0.625-in. (15.86-mm) centers (see Figure 1 or Figure 2).
 | Note: Additional grounding is provided to an AC-powered router when you plug its power supplies into grounded AC power receptacles. |
Figure 1: Connecting AC Power to the Router
Figure 2: Connecting DC Power to the Router
