680.25 Feeders. These provisions shall apply to any feeder on
the supply side of panelboards supplying branch circuits for
pool equipment covered in Part II of this article and on the
load side of the service equipment or the source of a separately
derived system.
(A) Feeders. Where feeders are installed in corrosive environments
as described in 680.14, the wiring method of that
portion of the feeder shall be as required in 680.14(B) or shall
be liquidtight flexible nonmetallic conduit. Wiring methods
installed in corrosive environments as described in 680.14 shall
contain an insulated copper equipment grounding conductor
sized in accordance with Table 250.122, but not smaller than
12 AWG.
Where installed in noncorrosive environments, feeders shall
comply with the general requirements in Chapter 3.
(B) Aluminum Conduit. Aluminum conduit shall not be
permitted in the pool area where subject to corrosion.