UL 1598:2021 pdf download.STANDARD FOR SAFETY-Luminaires.
5 Mechanical construction
5.1 General
5.1.1 The requirements in Clause 5 shall be used in conjunction with the applicable supplementary requirements in this Standard.
5.1.2 A part removed during user maintenance shall be:
a) designed to prevent replacement in a position that would affect the intended operation of the luminaire; or
b) marked to indicate proper replacement, in accordance with Table 20.1.1, Item 1.33.
5.1.3 There shall be no sharp edges, burrs, or method of constwction that can damage electrical insulation or reduce electrical spacings.
5.2 Assembly and packaging
5.2.1 All splices and electrical connections shall be completed at the factory, unless packaging requires partial disassembly. Only assembly and electrical connections that can be accomplished with ordinary tools or tools supplied with the luminaire shall be completed at the installation site.
5.2.2 A luminaire that requires partial assembly in the field shall be provided with assembly instructions as specified in Table 20.1.1, Item 1.33.
5.2.3 All the parts required to complete a luminaire shall be shipped together, or shipped separately and marked in accordance with Table 20.11 Item 1.8.
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 of fire;
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.UL 1598 pdf download.