This section was revised to require equipment enclosures, boxes,
conduit bodies, and fittings installed in agricultural buildings
to comply with the following requirements:
(C) Equipment Enclosures, Boxes,
Conduit Bodies, and Fittings.
(1) Excessive Dust. AEquipment
enclosures, boxes, conduit bodies, and fittings installed
in areas of agricultural buildings where excessive dust may
be present must be designed to minimize the entrance of dust
and have no openings (such as holes for attachment screws)
through which dust could enter the enclosure.
ignitionproof enclosures are not required and weatherproof
boxes could be used to meet this requirement.
(2) Damp or Wet Locations.
In damp or wet locations
of agricultural buildings, equipment enclosures, boxes, conduit
bodies, and fittings must be located or equipped to prevent
moisture from entering or accumulating within the enclosure,
box, conduit body, or fitting. In wet locations of agricultural
buildings, including normally dry or damp locations where
surfaces are periodically washed or sprayed with water, boxes,
conduit bodies, and fittings and must be listed for use in
wet locations, and equipment enclosures must be weatherproof.
(3) Corrosive Atmosphere.
Where wet dust, excessive moisture, corrosive gases or vapors,
or other corrosive conditions may be present in an agricultural
building, equipment enclosures, boxes, conduit bodies, and
fittings must have
corrosion resistant properties suitable for the conditions.