Nortel Networks 1000M User Manual

Page 128

128

Installing the system ground

DANGER

DANGER OF ELECTRIC SHOCK

Proper grounding is extremely important.
Failure to complete the following steps could result in a system
that is:

•

unsafe for personnel using the equipment

•

not protected from lightning or power surges

•

subject to service interruptions

Insulated ground wire must be used for system grounding.

Note: System ground is synonymous with system earth in the UK.

Cabinets or chassis powered by the same service panel

For each system cabinet in collocated multi-cabinet situations or for each
chassis, connect a #6 AWG (#40 Metric Wire Gauge) ground wire from
the cabinet or the chassis to an NTBK80 grounding block. Connect the
grounding block to a ground source (the ground bus in the AC service panel).

For an expanded Chassis system, consider the chassis and the chassis
expander as the same ground. Jumper the ground wire from the chassis
expander to the chassis. Then, connect the ground wire from the chassis to
the grounding block.

See

Table 20 "Region-specific grounding wire requirements" (page 129)

for

region-specific grounding requirements.

Cabinets or chassis powered by different service panels

For each system cabinet in collocated multi-cabinet situations or for each
chassis, connect a #6 AWG (#40 Metric Wire Gauge) ground wire from
the cabinet or the chassis to an NTBK80 grounding block. If any cabinet
or chassis cannot be powered from the same service panel, it must be
grounded separately from the others back to the service panel that supplies
it.

For an expanded Chassis system, all chassis and chassis expander pairs
must be powered from the same service panel.

See

Table 20 "Region-specific grounding wire requirements" (page 129)

for

region-specific grounding requirements.

Nortel Communication Server 1000

Communication Server 1000M and Meridian 1 Small System Installation and Commissioning

NN43011-310

01.04

Standard

Release 5.0

13 May 2008