Siemens HiPath 1120 - Connecting a Safety Ground Wire; Figure 4-45 Protection and Grounding Connection Diagram

Installation
4-184 Service Manual
Recommendations concerning the Power Supply and Protection of the System
The connection between the HiPath 1100 system and the distribution box must be made using
multipair cables, preferably foil shielded. This type of flat cable has a special grounding wire that
must be connected to the safety ground, but only at the distribution box end
.
Figure 4-45 Protection and grounding connection diagram
4.14.2 Connecting a safety ground wire
For the safety of the user and the technician the HiPath 1190 system has a dedicated terminal
for grounding its metal enclosure. This terminal is located on the back of the enclosure.
Connecting a ground wire protects the accessible metal parts of the equipment against high
voltage and power levels in the event of a surge or a failure.
The ground connection is critical and must be wired before connecting the system to a power
grid or an internal or external telecommunications network. To make this connection, follow
these guidelines:
For the RSA version the primary protection for external lines and extensions must
be provided according to local regulations.