The maximum voltage to ground in a 480-volt, corner-grounded delta system is ___.

In a 480-volt corner-grounded delta system, the maximum voltage to ground is 480 volts because of the system's configuration. In this type of delta system, one corner of the delta is connected to ground, providing a reference point for the phase voltages.

In a corner-grounded delta, one of the phases is connected directly to ground while the other two phases maintain their full voltage with respect to ground. This means that the phase that is grounded can safely operate at the full line-to-line voltage of the system, which is 480 volts.

The other phase voltages can be considered to be at 480 volts relative to the ground because the corner-grounded arrangement means that there is no reduction in voltage when measuring from a phase to ground.

Thus, the maximum voltage to ground in this system remains at the system's rated line-to-line voltage of 480 volts, making it the correct answer.