680.11 Underground Wiring Location. Underground wiring
shall be permitted where installed in rigid metal conduit, intermediate
metal conduit, rigid polyvinyl chloride conduit, reinforced
thermosetting resin conduit, or Type MC cable, suitable
for the conditions subject to that location. Underground wiring
shall not be permitted under the pool unless this wiring is
necessary to supply pool equipment permitted by this article.
Minimum cover depths shall be as given in Table 300.5 .