NORA Lighting NFBIC-6INCATA 6" Line Voltage IC Airtight Fire Rated HousingNORA Lighting NFBIC 6INCATA NFBIC 6INCATA Product Description Specification grade fire rated new construction housing. The double wall fixture incorporates a non combustible fiber insulation to prevent passage of flames, toxic gases, ignitable gasses into ceiling plenums. The UL Classified housing is rated for a minimum of 2 hours protection. The noncombustible fiber fill also acts as sound deadening material eliminating the transfer of sound between