UL 486C:2018 pdf download.Splicing Wire Connectors.
7.15.1 After being subjected to the test specified in 9.15, each sample set of wire connectors intended tobe installed in air-handling spaces shall comply with the following parameters:
a) The peak rate of heat release(HRRc) measured during each test shall be 100 kW or less.b) The peak normalized optical density measured during each test shall be 0.50 or less.c) The average normalized optical density (10 min test duration) shall be 0.15 or less.8 Sampling requirements
8.1 General
8.1.1 See Table 8 for the minimum number of specimens for test.
8.1.2 Separate specimen sets shall be used for each of the test sequences in Table 3 and Table 4.
8.1.3 Specimen sets shall be tested using both solid and stranded conductors for 30 -10 AWG (0.05-5.3 mm) sizes, and using stranded conductor for 8 AWG (8.4 mm2) and larger sizes unless the connectoris marked as specified in 10.8, in which case the conductor used shall be of the type or types marked onthe connector.
8.1.4 With reference to 8.1.3, for twist-on wire connectors, the dielectric-withstand test shall be performedon solid conductors only unless the connector is designed for stranded wire only.
8.1.5 lf the conductor range of a connector includes sizes 14-10AWG (2.1-5.3 mm2), and these sizesare not included in the test sample selection, additional sample sets shall be tested using the maximumsize solid conductor in the range of 14-10 AwG (2.1-5.3 mm2.
8.1.6 For a line of connectors of similar design but of different sizes, the following sizes shall be tested:
a) The largest and the smallest sizes if the line consists of four sizes or less;
b) The largest, smallest, and one representative intermediate size if the line consists of fivesizes;and
c) The largest,smallest,and two representative intermediate sizes if the line consists of morethan five sizes.
