MX960 Router Grounding Specifications

MX960 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 right of the lower rear of the chassis for connecting the router to earth ground (see Figure 1 or Figure 2).

Figure 1: Connecting AC Power to the Router

Figure 2: Connecting DC Power to the Router

MX960 Router Grounding Cable Lug Specifications

Caution: Before router installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the router.

To ground AC-powered and DC-powered routers, connect a grounding cable to earth ground and then attach it to the chassis grounding points using two screws. The left pair of grounding points fits M6 screws (European), and the right pair fits UNC 1/4–20 screws (English). The grounding points are spaced at 0.625-in. (15.86-mm) centers. The accessory box shipped with the router includes the cable lug that attaches to the grounding cable (see Figure 3) and two UNC 1/4–20 screws used to secure the grounding cable to the right pair of grounding points.

Warning: The router is a pluggable type A equipment installed in a restricted access location. It has a separate protective earthing terminal (Metric [–M6] and English [–¼-20] screw ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earth terminal must be permanently connected to earth.

Figure 3: Grounding Cable Lug

MX960 Router Grounding Cable Specifications

The 48 VDC facility must be equipped with a circuit breaker rated 40 A (–48 VDC), or 60 A (–48 VDC), and the grounding cable must be minimum 10 AWG, or as required by the local code.

Note: Additional grounding is provided to an AC-powered router when you plug its power supplies into grounded AC power receptacles.

Warning: The router is installed in a restricted-access location. It has a separate protective earthing terminal (Metric [–M6] and English [–¼-20] screw ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earth terminal must be permanently connected to earth.