What is the indicated phase-to-ground voltage for an ungrounded 240-volt, delta-connected system?

In an ungrounded 240-volt, delta-connected system, the phase-to-ground voltage is the same as the line voltage due to the nature of the system's configuration. In a delta connection, each of the three phases is connected to one another in a triangular format, resulting in the line voltage being equal to the phase voltage.

Since the system is specified as 240 volts and is ungrounded, each phase still operates at that same voltage level relative to the other phases. Therefore, in such a configuration, the phase-to-ground voltage remains at 240 volts, matching the line voltage as there is no ground reference to alter this value.

In contrast, the other options do not fit this scenario: 120 volts would be the phase-to-ground voltage in a wye (star) configuration with a similar line voltage, while 480 volts and 600 volts exceed the specified system voltage and do not represent typical phase-to-ground values in this context. Therefore, 240 volts accurately indicates the phase-to-ground voltage for the given ungrounded delta-connected system.