the source of illumination.
(2) The panel effectively isolates the Class I location from the area in which the lighting unit is located.
(3) The lighting unit is identified for its specific location.
(4) The panel is of a material or is protected so that breakage is unlikely.
(5) The arrangement is such that normal accumulations of hazardous residue on the surface of the panel will not be raised to a dangerous temperature by radiation or conduction from the source of illumination.
(D) Portable Equipment. Portable electric luminaires or other utilization equipment shall not be used in a spray area during spray operations.
Exception No. 1: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type identified for Class I, Division J
or Class 1, Zone 1 locations where readily ignitible residues may be present. [33:6.9 Exception]
Exception No. 2: Where portable electric drying apparatus is used in automobile refinishing spray booths and the following requirements are met:
(a) The apparatus and its electrical connections are not located within the spray enclosure during spray operations.
(b) Electrical equipment within 450 mm (18 in.) of the floor is identified for Class I, Division 2 or Class I, Zone 2 locations.
(c) All metallic parts of the drying apparatus are electrically bonded and grounded.
(d) Interlocks are provided to prevent the operation of spray equipment while drying apparatus is within the spray enclosure, to allow for a 3-minute purge of the enclosure before energizing the drying apparatus and to shut off drying apparatus on failure of ventilation system.
(E) Electrostatic Equipment Electrostatic spraying or detearing equipment shall be installed and used only as provided in 516.10.
FPN: For further information, see NFPA 33-2007, Stan- dard for Spray Application Using Flammable or Combustible Materials.
516.7 Wiring and Equipment Not Within Class I and II Locations.
(A) Wiring. All fixed wiring above the Class I and II lo- cations shall be in metal raceways, rigid nonmetallic conduit, or electrical nonmetallic tubing, or shall be Type MI, TC, or MC cable. Cellular metal floor raceways shall be permitted only for supplying ceiling outlets or extensions to the area below the floor of a Class I or II location, but such raceways shall have no connections leading into or through the Class I or II location above the floor unless suitable seals are provided.
(B) Equipment. Equipment that may produce arcs, sparks, or particles of hot metal, such as lamps and landholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make- and-break or sliding contacts, where installed above a Class I or II location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed so as to prevent the escape of sparks or hot metal particles.