General Requirements
22 7705 SAR-A Chassis Installation Guide
Protective Safety Ground (Earth)
The cable used for safety ground should be at least the same gauge as the supply conductors,
green, or green and yellow, in color, and of sufficient length to connect the building earth
point to the chassis ground connection (refer to Chassis Ground Wiring for specific
instructions on connecting the chassis ground).
EMC Compliance
EMC compliance may require the use of shielded cables or other special accessories. Where
required, these special accessories must be installed as per the instructions.
To maintain EMC compliance, cables that are shielded and grounded at both ends must be
used on the following interfaces and ports:
• Management (Ethernet) and console ports
•ToD port
• Synchronization interfaces
• Ethernet interfaces
• T1 and E1 interfaces (variant with T1/E1 ports)
Regulatory Symbols
The 7705 SAR-A uses various regulatory approvals symbols. They may be used on product
markings such as approvals labels. These symbols are described in IEC 60417.
Figure 2 and Figure 3 show symbols of a terminal that you must connect to earth ground
before you make any other connections to the equipment.
Figure 2: Protective Earth (ground)
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