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602.2.4 Loudspeakers and Recessed Lighting
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Loudspeakers
and recessed lighting fixtures, including their
assemblies and accessories, in plenums shall be listed and
labeled for use in plenums and shall have a peak rate of
heat release not exceeding 134 horsepower (hp) (100 kW),
an average optical density not exceeding 0.15, and a peak
optical density not exceeding 0.5, where tested in accordance
with UL 2043.
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