UL 1598-2021 pdf download – Luminaires.
5.2.4 Parts such as decorative glassware may be shipped separately and do not require identification. 5.2.5 An unassembled luminaire with accessible non-current-carrying parts that can be energized after the luminaire is installed shall be provided with means for fastening and bonding those parts. The use of screws or snap-in or tab-mounted parts shall meet the intent of this requirement. 5.2.6 The number of conductors shall not exceed 5 when using a twist-on wire connector for field wire connection. 5.2.7 Conductors intended for field connection shall have matching identification by color, number, letter, or other acceptable means. 5.2.8 A field connection between conductors of adjoining sections shall be accessible for inspection without the disconnection of any portion of the wiring. 5.3 Enclosures 5.3.1 A luminaire enclosure shall perform the following functions: a) reduce the risk of contact with live parts; b) enclose electrical parts and components that can involve a risk offire; c) protect internal parts from mechanical damage; and d) protect internal parts from the environment. 5.3.2 An enclosure shall be constructed of metal (see Clause 5.5), glass (see Clause 5.16), ceramic [3 mm (0.118 in) minimum thickness], or a polymeric material (see Clause 5.7). 5.3.3 All splices, open coil devices, capacitors, live parts (including traces on a printed circuit board having voltage levels that present a risk of shock or a risk of fire), leads or terminals for field connection of supply wires, and other arcing live parts shall be provided with an enclosure. 5.4 Barriers 5.4.1 A barrier shall be constructed of one of the following: a) ferrous or nonferrous metal at least 0.41 mm (0.016 in) thick; b) glass or ceramic at least 3 mm (0.118 in) thick;
5.6 Corrosion protection 5.6.1 All ferrous metal parts, including hinges, bolts, and fasteners, exposed after assembly shall be protected against corrosion by painting, coating, or plating. Copper, aluminum, alloys of copper and aluminum, stainless steel, and similar materials having inherent resistance to atmospheric corrosion are not required to have additional corrosion protection. 5.6.2 Edges, punched holes, and spot welds in prefinished steel, enclosed steel pipe, and hanger locations for painting or plating in ferrous metals do not require any corrosion protection. 5.6.3 The requirements of Clause 5.6.1 shall not apply to the following: a) bearings, sliding surfaces of a hinge or shaft, hinge pins, and similar parts located on the exterior of enclosures where such protection is not practicable; and b) decorative parts. 5.6.4 Vitreous enamels may be used as a protective coating for ferrous sheet metal having a minimum thickness of 0.6 mm (0.025 in). 5.7 Polymeric materials 5.7.1 General 5.7.1.1 Polymeric materials shall comply with the applicable requirements of Clauses 5.7.1.2 to 5.7.1.8. 5.7.1.1 (MEX) In Mexico, polymeric materials shall have minimum thickness in accordance with Table 5.7.1 (MEX).