A 350-Amp, 277/480-volt, 3Ø, 4-wire service consists of three 500 kcmil ungrounded conductors and one grounded conductor. The smallest grounded conductor that can be installed for this service is ___ AWG or kcmil where the neutral load is unknown but could be the same as any ungrounded conductor since all the loads are 277-volt lighting. Select one: a.2 b.1 c.500 d.1/0 e.3
