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Central Office Ground Procedure
The system ground should be connected to the building’s principal ground point (Central Office
Ground). The conductor size must conform to local standards.
Centralized Architecture:
Follow local practice for Centralized Architecture
Distributed Architecture:
Connection to the power system is through the M10 studs located on the distribution return bus.
See Figure 5 - 6 (full - height cabinet).
Central Office Ground for Distributed Architecture
Step Action
Run and connect the system ground lead to the initial cabinet return bus. This connection will connect the re-
turn side of the dc system to earth ground.
Torque connections as specified in Figure 5 - 6.
Cabinet Ground Procedure
The next step is to ground the cabinet framework. Local grounding practices will determine the
grounding method and the size of cable connected to the cabinet. A 2 - gauge pigtail (847992070), as
shown in Figure 5 - 6, is provided for this purpose.
Cabinet Ground and Central Office Ground
Cabinet Ground
Step Action
Run and connect the framework ground lead as shown in Figure 5 - 6.
Torque connection as specified in Figure 5 - 6.
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