Question 7Electricity & Electronics - 1st Asst/Chief

The correct answer is D) the average of phase to phase and phase to hull ground voltages. The nominal voltage represents the average of the phase to phase and phase to hull ground voltages, as this is the standard way to define the normal electrical system design voltage. This is determined based on the information displayed on nameplates, dataplates, schematics, or single-line diagrams. The other options are incorrect because they do not accurately represent the definition of nominal voltage. Option A refers to the phase to hull ground voltage, Option B refers to the phase to neutral voltage, and Option C refers to the phase to phase voltage, none of which fully capture the concept of nominal voltage as the average of the two.