A 225 KVA, 480 delta to 208/120-volt, 3-ph, 4-w transformer is to be installed.• One set of secondary conductors is installed from the transformer to a 400-A MB panelboard. There will be two parallel conduits to this 400-A panel. Each conduit will contain 4 each 3/0 conductors. A second set of secondary conductors is installed from the transformer to a 225-A MB panelboard. One conduit will be installed between this 225-amp panel and the transformer. The conduit will contain 3 each 4/0 ungrounded conductors and the smallest permitted size grounded conductor. Almost all the connected load is 3-phase.The smallest grounded conductor you can install in the conduit to the 225-A PB is ___ AWG.
Select one:
a.1/0
b.2/0
c.3/0
d.2
e.3
