A grounded conductor is run in four parallel conduits with 4 sets of 250 kcmil service conductors to a 1000-amp 277/480-volt, 3-ph, 4-w switchboard. The minimum size of the neutral in each conduit is ___ AWG or kcmil.
Select one:
a. 4
b. 1/0
c. 2/0
d. 3/0
e. 250
The answer is b. 1/0 for 250 kcmil: T.250.102(C)(1) 2 AWG vs 1/0 minimum for parallel
