A typical configuration for the ac power system showing the neutral and grounding conductor is illustrated in figure 2-2. (To simplify this figure, the redundant buses in the switchgear and the redundant feeds are not shown.)
Other changes include the following:
Typically, every transformer between the ac power source and the load is a delta-primary/wye-secondary configuration, thus establishing a separately derived source at each transformer. Furthermore, the neutral is usually not run between intermediate switchgear.
Context Considerations
For example, although the neutral is usually present in the intermediate switchgear, it is usually not continued to the next successive transformer/switchgear assembly. It commonly begins at the last transformer prior to a single-phase load and is then routed with the phase conductors through the remaining switchgear and distribution panels to the loads.
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