Is it true or false that ground fault protection of equipment is required for solidly grounded wye electrical services of more than 150 volts to ground?

Ground fault protection of equipment is indeed required for solidly grounded wye electrical services of more than 150 volts to ground. This requirement is based on the National Electrical Code (NEC) provisions that aim to enhance safety and reduce the risk of electric shock, fire, and damage to equipment caused by ground faults.

In particular, Article 230 of the NEC outlines specific conditions where ground fault protection may be necessary. For systems operating at voltages over 150 volts to ground, such protection becomes essential to ensure that any faults that may inadvertently occur can be quickly detected and isolated, thereby protecting both personnel and equipment.

The requirement applies regardless of the type of facility—be it commercial, industrial, or residential—ensuring that all solidly grounded wye configurations above this voltage threshold are equipped with the necessary ground fault protection mechanisms. This uniform requirement acts as a standard for electrical safety in various environments, promoting a consistent approach in protecting against ground faults.

While there are provisions that may allow for certain exemptions in specific circumstances, such as being dependent on the utility company's guidelines, the fundamental requirement stands firm for safety reasons in installations exceeding the specified voltage levels.