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Grounding the SRX220 Services Gateway


To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must adequately ground the SRX220 Services Gateway before connecting power.

Figure 1 shows how to connect a grounding cable to the services gateway.

Figure 1: Grounding the SRX220 Services Gateway
Grounding the SRX220 Services

You ground the device by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points using one M3 screw.

Table 1 lists the specifications of the grounding cable used with the device.

Table 1: Grounding Cable Specifications for the Services Gateway

Grounding Requirement


Grounding cable

14 AWG single-strand wire cable

Amperage of grounding cable

Up to 4 A

Grounding lug

Ring-type, vinyl-insulated TV14-6R lug or equivalent


Before device installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you use. A cable with an incorrectly attached lug can damage the device (for example, by causing a short circuit).

To ground the device:

  1. Connect the grounding cable to a proper earth ground.
  2. Verify that a licensed electrician has attached the cable lug to the grounding cable.
  3. Place the grounding cable lug over the grounding point on the upper rear of the chassis.
  4. Secure the grounding cable lug to the grounding point with the screw. Apply between 6 in.-lb (0.67 Nm) and 8 in.-lb (0.9 Nm) of torque to the screws.
  5. Dress the grounding cable and verify that it does not touch or block access to the services gateway components and that it does not cause create a tripping hazard.


The device should be permanently connected to ground during normal operation.