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Ground block
A ground block must be provided if multiple Communication Manager Branch i120s are being
installed. The ground block, intended for rack mounting, has terminals available for terminating
Supplementary Ground Conductors. Up to ten Communication Manager Branch i120s can be
grounded at the block installed close to the equipment (on a rack) and then a single ground
conductor can be routed from the same block to an approved ground. If the ground block is to
be used, you must supply it and have it installed by an electrician.
!
DANGER :
For customer-installed equipment, failure to install both grounds will void the
DANGER:
Product Safety certifications (UL and the CE Mark) on the product, as well as
allow a hazard to be present that could result in death or severe personal injury.
Restricted access location
In Finland, Norway and Sweden, the Communication Manager Branch i120 must be installed in
a Restricted Access Location, due to concerns with regional earthing. A Restricted Access
Location is defined as access that can be gained by only Service Personnel or Customers who
have been instructed about the reasons for the restricted access and any safety precautions
that must be taken. In these cases, access to theCommunication Manager Branch i120 is
gained by the use of a tool (such as a lock and key) or other means of security.
!
WARNING:
For installations in Finland, Norway and Sweden, the Communication Manager
WARNING:
Branch i120 relies on two ground connections (mains plug with an earth contact
and a Supplementary Ground Conductor).
Approved grounds
An approved ground is the closest acceptable medium for grounding the building entrance
protector, entrance cable shield, or a single-point ground of electronic telephony equipment. If
more than one type of approved ground is available on the premises, the grounds must be
bonded together as required in Section 250-81 of the NEC for the US or per the local electrical
code regulations in the country of installation.
Grounded Building Steel. The metal frame of the building where it is effectively grounded
●
by one of the following grounds: acceptable metallic water pipe, concrete encased ground,
or a ground ring.
Ground
Issue 3 May 2009
11
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