Juniper Networks EX8208 manual Grounding Cable and Lug Specifications for EX8200 Switches

Chapter 3: Component Specifications

Standards Supported by These Cables

The cables comply with the following standards:

•SFP mechanical standard SFF-843—seeftp://ftp.seagate.com/sff/SFF-8431.PDF.

•Electrical interface standard SFF-8432—see ftp://ftp.seagate.com/sff/SFF-8432.PDF.

•SFP+ Multi-Source Alliance (MSA) standards

Related Topics • Optical Interface Support in EX3200 and EX4200 Switches

•Optical Interface Support in EX4500 Switches

•Optical Interface Support in EX8200 Switches on page 60

•Installing a Transceiver in an EX Series Switch on page 163

•Removing a Transceiver from an EX Series Switch on page 222

Grounding Cable and Lug Specifications for EX8200 Switches

For installations that require a separate grounding conductor to the chassis, the switch must be adequately grounded before power is connected to ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements. To ground an EX8200 switch, connect a grounding cable to earth ground and then attach it to the chassis grounding points.

CAUTION: For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the EX8200 switch chassis to connect to earth ground. Before switch installation begins, a licensed electrician must attach a cable lug to the grounding cables that you supply. See “Connecting Earth Ground to an EX Series Switch” on page 167. A cable with an incorrectly attached lug can damage the switch.

A pair of threaded inserts (PEM nuts) is provided on the right side towards the top rear corner of the EX8208 chassis for connecting the switch to earth ground. The grounding points fit UNC ¼-20 screws. The grounding points are spaced at 0.625 in. (15.86 mm).

Two pairs of threaded inserts (PEM nuts) are provided on the EX8216 chassis for connecting the switch to earth ground. The first pair is located on the right side towards the top rear corner of the chassis. The second pair is on the rear of chassis towards the right bottom corner of the chassis. Both pairs of grounding points fit UNC ¼-20 screws. The grounding points are spaced at 0.625 in. (15.86 mm).

NOTE: EX8216 switches have two protective earthing terminals provided on the chassis. Only one of these protective earthing terminals needs to be permanently connected to earth ground. See Chassis Physical Specifications of an EX8216 Switch for the location of the protective earthing terminals.

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