Grounding Cable and Lug Specifications for EX9200 Switches
To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect an EX9200 switch to earth ground before you connect power to the switch. You must use the protective earthing terminal on the switch chassis to connect the switch to earth ground.
The switch is installed in a restricted-access location. It has a separate protective earthing terminal on the chassis that must be permanently connected to earth ground to adequately ground the chassis and protect the operator from electrical hazards.
Before switch installation begins, ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.
Grounding Points Specifications for an EX9200 Switch
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the switch must be adequately grounded before power is connected. To ground AC-powered and DC-powered switches, 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 switch 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.
Additional grounding is provided to an AC-powered switch when you plug its power supplies into grounded AC power receptacles.
Grounding Cable Lug Specifications for an EX9200 Switch
The accessory box shipped with the switch includes one cable lug that attaches to the grounding cable (see Figure 1) and two UNC 1/4–20 screws used to secure the grounding cable to the grounding points.
Before switch 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 switch.
The same cable lug is used for the DC power cables.
Grounding Cable Specifications for an EX9200 Switch
The grounding cable that you provide must meet the specifications in Table 1.
Table 1: Grounding Cable Specifications
Quantity and Specification
One 6 AWG (13.3 mm2), minimum 60 °C wire, or one that complies with the by the local code
For DC-powered EX9214 switches, 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 one that complies with the by the local code.