Grounding System Maintenance; Grounding System Diagrams; Tools Required - Nortel DMS-100 Series Maintenance Manual

4 Grounding system maintenance

Accurate diagrams and appropriate tools are essential to the maintenance of
the grounding system.

4.1 Grounding system diagrams

There should be an accurate schematic diagram of the grounding system, as
well as floor plan diagrams showing the location of grounding system
components at the DMS site. The schematic diagram should show:
The floor plan should show the location of each DMS cabinet or frame and
each ground bar in the grounding system. If such diagrams are not at the
DMS site, contact the operating company engineering group to obtain these
diagrams.

4.2 Tools required

Typical tools for performing maintenance on the DMS switch grounding
system are as follows:
DMS-100 Family Power and Grounding Routine Maintenance Manual Applies to all BCS/PCL levels
the various grounding bars
the grounding leads to each grounding bar
the magnitude and direction of the current on each grounding lead.
flashlight
stiff, non-metallic bristle brush
wire brush
voltmeter capable of measuring up to 100 V dc (or equivalent)
clamp-on ammeter (or equivalent)
torque wrench
blank cable tags
note pad for recording problems
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