When installing polyvinyl chloride conduit (PVC) or reinforced thermosetting resin conduit (RTRC) as a Class I, Division 1 wiring method for an underground installation in a tank farm area, which statement is not true?
A. The conduit(s) must be installed with 24 in. of cover over the top of the concrete, which encases the conduit.
B. The conduit(s) must be covered by at least 2 in. of concrete.
C. The conduit(s) must be encased in a concrete envelope by at least 2 in. of concrete....More