Grounding Method - Nortel Meridian 1 Planning And Installation Manual

Grounding method

To prevent ground loops, power all chassis from the same dedicated
power panel. Ground all chassis to the power panel through the
grounding block.
The method of grounding used for the Option 11C Mini depends on whether
all chassis are powered by the same service panel.
The following three grounding scenarios are possible:
1 A single-chassis system
2 A multiple-chassis system powered by the same service panel
3 A multiple-chassis system powered by different service panels
Single-chassis system or chassis powered by one service panel
For each system chassis, a #6 AWG (#40 Metric Wire Gauge) ground wire is
connected from the chassis to the NTBK80 grounding block. See Table 6 on
page 31 for region-specific grounding wire requirements. The grounding
block is connected to a ground source (the ground bus in the AC power
service panel) and the Chassis Expander.
Chassis powered by different service panels
For each system chassis, a #6 AWG (#40 Metric Wire Gauge) ground wire is
connected from the chassis to the NTBK80 grounding block. See Table 6 on
page 31 for region-specific grounding wire requirements. If any chassis
cannot be powered from the same service panel, ground it separately from the
others back to the service panel that supplies it.
Note 1: A separately grounded chassis is grounded the same as a
single-chassis system.
Note 2: In the UK, the grounding wire can be connected from the
chassis to an NTBK80 grounding block or through a Krone Test Jack
Frame.
Chapter 3 — System and site requirements
CAUTION
Option 11C Mini
Page 35 of 590
Planning and Installation Guide