Meridian Nortel 1 Option 11C Mini Installation Manual page 50

Page 50 of 332 Chapter 3 — System and site requirements
553-3021-209 Standard 3.00
Ground bus isolation (Canada and the United States)
According to the exception to article 384-20 in the United States National
Electrical Code (NEC), a panel's ground bus can be isolated from the
housing. This exception applies provided that the panel is not at the main
service entrance. This exception applies to some Canadian locations also. For
more information about ground bus isolation, refer to local electrical codes.
Do not isolate the ground bus from the housing unless permitted by
local electrical codes. Do not perform work inside electrical panels
unless you are a qualified electrician. Do not try to remove bonding
conductors without approval from qualified personnel.
Route ground conductors, between supply panels, through the same
conduit as the supply conductors. This safety requirement is part of
both the National Electrical Code (NEC) and the Canadian Electrical
Code (CEC).
Single Point Grounding (SPG)
Correct grounding of communications systems is necessary for protecting
equipment from the hazards of surge and noise interference. The Single Point
Grounding (SPG) method of protecting communications equipment is the
Nortel Networks standard for Meridian 1 systems.
The requirements for Single Point Grounding are in the following major
categories: Safety, Protection, EMC, Installation and Maintenance,
Powering, and Advances in Technology.
Safety
For a safe working environment, your grounding system must be able to
dissipate unwanted surge energies, such as lighting on the outside plant. The
grounding system must be designed so that fuse or breakers operate to disrupt
the excessive current flow caused by a power fault.
April 2000
CAUTION
CAUTION