Patent ID: 8657473

Claim:
A fire barrier recessed lighting fixture arrangement comprising, in combination: a mounting pan; a lamp housing mounted on said mounting pan and having internal walls defining a lamp accepting cavity and lower edges; an outer enclosure mounted on said mounting pan and surrounding said lamp housing and spaced a first preselected distance therefrom and said outer enclosure have having an outer enclosure top wall and outer enclosure side walls, at least some of said outer enclosure side walls having outer enclosure lower surfaces engaging said mounting pan to support said outer enclosure thereon; an inner enclosure mounted on said mounting pan intermediate said lamp housing and said outer enclosure and spaced a second preselected distance from said outer enclosure to define an air gap between said outer enclosure and said inner enclosure, and said inner enclosure spaced a third preselected distance from said lamp housing, and said inner enclosure having an inner enclosure top wall and inner enclosure side walls, and at least some of said inner enclosure side walls having inner enclosure lower flange like surfaces for supporting said inner enclosure on said mounting pan; whereby said outer enclosure and said inner enclosure as mounted on said mounting pan prevent fire prevent fire from passing from said mounting pan to regions external said outer enclosure.