UL 746C:2018 pdf download.Polymeric Materials - Use in Electrical Equipment Evaluations.
4.4 Decorative parts are not required to be made of a matenal classed 5VA. 5VB, V.0, V.1, V•2, or HB, providing the part does not occupy a volume greater than 2 cubic centimeters (0.122 cubic Inch), does not have any dimension greater than 3 cm (1.18 inch), and is located so It cannot propagate flame from one area to another or bridge between a possible source of ignition and other ignitable parts.
4.5 The use of a flame-retardant coating applied to the inside of a polymeric endosure is not acceptable unless the coating/material interlace is found to be acceptable by separate investigation (see Flame-Retardant Coatings, Section 20).
5 Portable Unattended Household Equipment — Alternate Path
5.1 General
5.1.1 The basic flammability resistance requirement foi’ polymeric enclosures of portable unattended household equipment is the use of a V.0. V-I or V-2 rated material, or of a material that complies with the 12 mm or 20 mm end-pioduct flame tests as described in Sections 15 and 16. Alternatively, the use of HB rated materials as the enclosure of portable unattended household equipment is acceptable if the requirements in this section are met.
5.12 In addition to the requirements Outlined in Table 4.1, portable unattended nousenold equipment employing HB rated enclosure material shall comply with the Severe Conditions Test per 28.1, Mold Stress Relief Distortion Test per 29.1 (utilizing conditioning guidelines as outlined in 61.2) and Input after Mold Stress Relief Test per 30.1.
5.1.3 All electrical connections within the polymeric endosure of portable unattended household equipment employing HB rated enclosure material shall comply with 5.2, 5.3 and 5.4.
4.5 The use of a flame-retardant coating applied to the inside of a polymeric endosure is not acceptable unless the coating/material interlace is found to be acceptable by separate investigation (see Flame-Retardant Coatings, Section 20).
5 Portable Unattended Household Equipment — Alternate Path
5.1 General
5.1.1 The basic flammability resistance requirement foi’ polymeric enclosures of portable unattended household equipment is the use of a V.0. V-I or V-2 rated material, or of a material that complies with the 12 mm or 20 mm end-pioduct flame tests as described in Sections 15 and 16. Alternatively, the use of HB rated materials as the enclosure of portable unattended household equipment is acceptable if the requirements in this section are met.
5.12 In addition to the requirements Outlined in Table 4.1, portable unattended nousenold equipment employing HB rated enclosure material shall comply with the Severe Conditions Test per 28.1, Mold Stress Relief Distortion Test per 29.1 (utilizing conditioning guidelines as outlined in 61.2) and Input after Mold Stress Relief Test per 30.1.
5.1.3 All electrical connections within the polymeric endosure of portable unattended household equipment employing HB rated enclosure material shall comply with 5.2, 5.3 and 5.4.
