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
