INSTALLATION PROCEDURES
58 FOX615Installation
3.6.3.3 Subrack earthing
For reliable EMC results of the FOX installation it is required that the FOX
subrack is connected to the protective ground.
Attention to proper earthing. Risk of electric shock!
It is mandatory to connect the FOX subrack to a suitable protective ground
e.g. the Common Bonding Network!
There are two methods how to provide the earthing for the FOX subrack:
• The subrack is connected to the protective ground directly via the rack:
The 19-inch mounting flanges of the subrack are conductive and provide
a conductive contact to the rack if the rails of the rack also provide a con-
ductive surface. The rack must be connected to the protective ground.
This is the preferred method, providing a simple and reliable system
earthing.
• As an alternative the subrack is connected to the protective ground via an
earthing cable (refer to Figure 32):
The earthing wire must
− have a cross section of 10 mm
2
,
− be equipped with a crimp lug (10 mm
2
wire cross section, M6 screws)
on the FOX subrack side,
− be reliably connected to the Common Bonding Network (For details of
the Common Bonding Network principles, refer to ETSI EN 300 253
V2.1.1).
The rack normally provides a suitable terminal of the CBN.
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