3/10/2024 0 Comments Amazing breaker level 70![]() In a 277/480 volt system, the voltage to ground is 277 volts. This rules out the typical 120/208 volt system where the voltage TO GROUND is 120 volts. This requirement is for the protection of the actual equipment, not personnel.Īlways keep in mind that one trigger for the GFPE requirement is that the voltage TO GROUND is more than 150 volts. ![]() A common example is a 1000 amp, 480-volt feeder or service disconnect. GFPE has been required for many code cycles for feeder and service disconnects rated 1000 amps or more and installed on solidly grounded wye electrical systems of over 150 volts to ground, but not exceeding 600 volts phase-to phase. Code Change Summary: A new section was added to require ground-fault protection of equipment (GFPE) for specific branch circuit disconnects.
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