In a corner-grounded delta system, the voltage potential to the ground is considered safe up to ___ volts.

In a corner-grounded delta system, the voltage potential to ground is considered safe up to 480 volts. This specific configuration allows for one of the three phases to be intentionally grounded. The grounding serves several functions, including protecting equipment and providing a reference point for the system.

In this setup, the voltage between a phase conductor and ground can reach up to the line-to-ground voltage of the system. For a typical three-phase delta system, the line-to-line voltage often goes up to 480 volts, which is a standard voltage level used in industrial applications. Therefore, when a single phase is grounded, the potential to ground remains safe and manageable within this framework.

Lower voltages, such as 120 volts or 277 volts, might also exist in other configurations or as secondary service voltages, but the corner-grounded delta system primarily emphasizes its safety at 480 volts due to the grounding method employed.