Gary -
The below may be a little more than you bargained for, but here goes. My
apologies, if this is more basic than your question.
Each of the drawings in Figures NAB.1 and NAB.2 show grounding electrodes at
the bottom. In Figure NAB.1, the electrode is used to earth the centralized
dc power
Gary,
WHY have the floating system? In order to reduce corrosion in the Outside
Plant wiring, telephone lines are held negative with respect to Earth. This
imposes a need to hold circuitry directly connected to them negative as
well. Specifically, both the tip and ring conductors are maintaine
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