A very long branch circuit has been installed underground in Schedule 40 PVC. The circuit extends from a 120/208-volt, 3-phase, 4-wire panelboard to the load. The branch circuit conductors are connected to a 20-A circuit breaker in the panel. Due to voltage drop considerations, 1 AWG circuit conductor has been installed. The smallest EGC that can be installed in the PVC is ___ AWG or kcmil..
Select one:
a. 12
b. 6
c. 1
d. 4
e. 8
The answer is c. 1.
