A. Service disconnects and feeder circuits rated 1,000A or more, supplied from a 4-wire, 3-phase, 277/480V wye-connected system must be protected against ground faults in accordance with Sec. 230.95 ...

For equipment-only receptacles ... protection whether or not the house wiring is grounded—that’s why they are called “ground fault” devices and not “shock-protection” ones. Over the years the NEC has ...

They also include their own GFPE (Ground Fault Protection of Equipment), which is intended to protect equipment and is permitted to trip at values larger than 5mA, often in the 15–20mA range.

Attempting to plug three-prong appliance and equipment cords ... the GFCI provides shock protection by tripping and stopping the flow of electricity during a ground-fault condition.

overcurrent protection components, and ground-fault protection devices. The ground-fault system should be capable of detecting a fault, indicating that a fault has taken place, and be able to ...

The prospective patent relates to Viking Protection's proprietary transmission line ground fault prevention system ... use of cutting-edge technologies, equipment, and controls that communicate ...

The requirements for ground-fault protection of equipment are outlined in Sec. 240.13 of the 2011 NEC. Ground-fault protection of equipment shall be provided for solidly grounded wye electrical ...