Q. What is the Code rule for ground fault protection of equipment?
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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 [215.10 and 230.95]. The requirement for ground fault protection of equipment doesn’t apply to [240.13]: