Question: ( id: 1 1 1 9 1 2 ) Which of the following voltage and phase arrangements requires ground - fault protection of equipment for

(id:111912)
Which of the following voltage and phase arrangements requires ground-fault protection of equipment for each service disconnecting means rated at 1,000 amperes or greater?
a.120/240V, single-phase, 3-wire
b.208Y/120V,3-phase, 4-wire, wye-connected
c.480V,3-phase, 3-wire, delta-connected
d.480Y/277V,3-phase, 4-wire, wye-connected
( id: 1 1 1 9 1 2 ) Which of the following

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